Pinless Accumulator Piston Kit 77998-03K. Note the release pressure in Reverse. Please confirm if this is correct. The top line exiting the rad should be routed to the bottom line of the external cooler, read it stops (aeration), then route the coolers top return line back to the trans top inlet. 210 pound of force, divided by these two figures offers an internal torque converter pressure of 119 psi to 100 psi, respectively. Fax 410-298-3579. $135. Put it in a safe place until reassembly of the unit. 5. An accurate determination of the pressure drop of a compressible fluid flowing through a pipe requires knowledge of the relationship between pressure and specific volume of the fluid. Steady: In steady fluid flow, the fluid’s density remains constant at every point. IN-LINE MIXER. Description. Cooler th400 gm 700r th350 4l60 rebuild 700r4 transmissions reverse pickup k1500 truckforum 4l65 fti r42001 chevrolet silverado transmission cooler. The performance of a heat exchanger such as heat transfer rate and pressure loss strongly depends on the flow regime in the heat transfer system. In this zone of extremely low flow rate the fluid flows strictly in one direction and the friction factor shows a sharp dependency on flow rate as defined by the = = +oscillatory fluid behavior. full. Our base model TH350 has lived at over 600 HP reliably. Mark this point on the Chart. This style of dipstick requires 2 holes drilled into the firewall to mount which gives you easy access to the dipstick top check or top up fluid. The diagram indicates the flow directions, safety and control measures, and pressure ratings of a system through visual symbols. B) TH-350 and 700-R4 – Remove the long clip holding the governor cover to the case and remove1973-89 Pre-Bent Transmission Lines. " The bottom transmission line runs to the bottom of the radiator. If the trans cooler section of your radiator is vertical, connect the bottom port on the trans to the bottom port on the cooler, the top port on the cooler to the top port on the trans. As this figure shows in pure materials, by decreasing the pressure at a fixed. Ninety nine percent of hydraulic symbols use one of these three as a foundation. The fluid is returned from the top port of the radiator and connects to the bottom port on the TH400. The laboratory work is carried to determine the type of flow in fluids like laminar, turbulent, and transitional flows. The Laminar zone is the part on the extreme left. Identifies symptoms and recommended solutions for quality rebuilds. where. The TH700 uses a unique torque converter that will bolt right up to a TH350's flexplate. The refrigerator extracts heat Q c Q c from a cold-temperature reservoir at T c T c when the ideal gas expands isothermally. The tire is 36 inches tall (static—it grows 2-inches in the traps), and the rear gear ratio is 4. It has sealing rings that seal it to the direct drum, allowing it to transfer fluid to the drum to apply 3rd gear, and reverse. 1. 5 out of 5 stars. * Means extra charge will be $20. It is 26¼ inches long and boasts a 310mm torque converter. Check Details Strong shifts with tci's th400 billet valve body. Fluid flow in open tubes: 1. 0 bar) or, typically, on a 4-20mA electrical signal for industry or a 0-10V signal for HVAC systems. On the radiator the top is in and the bottom out. In other words. Compare. External transmission cooler to upper transmission cooler line port. With 75% of its components as that of TH400, it’s not new, it is strong. Instrumentation detail varies with the degree of design complexity. A data flow diagram typically shows the inputs, processes. The TH400 is 24. Moody diagram showing the. . Web most 1964 to 1967 models are equipt with a cooler bypass system. Figure 12-4: Typical schematic diagram. Stop at the wrist. Position jack stands securely under the vehicle. It is absolutely necessary that chemical engineers know how to read process flow diagrams because it is the primary method of detailing the process and design information. Like the 4L80E, there are also differences between the 4L85E and the TH400 transmission. Billet aluminum handle and billet aluminum fittings complement Lokar's Flexible engine Dipsticks. That said, I prefer and recommend Mobil 1, Royal Purple, or Amsoil synthetics. Turbo 400s use three tail shaft lengths; the most preferred units for a GM swap would have the short 4-inch tail shaft. Control signals for pneumatic systems are typically based on a pressure range of 3 to 15 psi (0. It was like that for a about 2 weeks or so, so a lot of other fluid drained as well besides the initial fluid that poured out at the beginning. Most 400s use 5/16" flare fittings, and 5/16" lines, most radiators do too. Description. Radiator with side tanks: Bottom = Feed/In from bottom Trans line. Use the adjusters on the transmission jack to keep the transmission well aligned with the engine. Billet Aluminum Powerglide Wicked Quick Valve Body®. Fluid Power Systems. Change the filter. Because the oil from the impeller is moving toward the turbine, it reacts to the force and flow of the oil. Chrysler . 40 1. $5,995. Older-style transmissions that don’t have overdrive can make it difficult to drive these cars on the freeway. These readings can be obtained by attaching a 300 psi fluid pressure gauge to the appropriate pressure port on the transmission, and running the engine at 2000 rpm. 8972 TH400 STREETFIGHTER® SERIES VALVE BODY 1965-87 MANUAL/AUTO VALVE BODY INSTALLATION INSTRUCTIONSTo read a Moody Chart, first calculate the relative roughness of the pipe, ε/D. TH350 Fluid Capacity. 6204 posts · Joined 2007. Routing of th400 tx fluid cooling lines. We will see in the next section that when the fluid is moving its pressure may change even if the fluid stays at the same height. Type F does not add friction modifiers to the fluid. , the 700R4, 4L60, TH350C. The trans was divided into sections, each section had a diagram and part. Customer read that it's the hot ticket. The type of flow expected in a given system can be determined by using the Reynolds number (Re): the ratio of inertial force and viscous force Re = ρ u dp/η Where: ρ = solvent density. Fluid mechanics is a branch of continuous mechanics which deals with a relationship between forces, motions, and statical conditions in a continuous material. 06:1 ratio. It is absolutely necessary that chemical engineers know how to read process flow diagrams because it is the primary method of detailing the process and design information. With more than. The TH350 has an aluminum case, and can easily be identified by the five-sided oil pan. Just as the heated coolant flows into the top of the radiator. 04 $ 73. Some are simply one square, such as pressure valves, but others use three joined. Modifications and options include: * Fully blueprinted and equipped with high-flow lube circuits, increased torque capacity, and hard chrome oil. Laminar flow is a type of a streamline flow in which there is a smooth movement to the fluid flow, the velocity, pressure and cross sectional area are constant at a given point of observation and time. TH400 Transmission, Rebuilt TH400 Transmission, TH400, Monster Transmission offers free shipping on TH400 transmissions, also offering completely rebuilt TH400 transmission and turbo 400 transmissions, TH400 rebuild. Hi Guys I was wondering if anyone could tell the direction of the fluid flow on a turbo 400 . Th400 fluid flow diagramTurbo gm trans th400 Th400 reverse manual valve bodyTh400 valve body diagram. in. MAN01 Click here to view special tools for this transmission. 47. This is a special hollow bolt; oil must flow through it to the intermediate clutch. Twin turbo setup. COA-23420 - TH400 FLUID OVERFLOW TANK. The fluid flow should pass through the valve body, the torque converter, and the cooler before entering the transmission. Follow ATI. 4L80E. In this diagram, all components are mapped out chronologically, making it a basic visual representation of a process. Size of Converter. This is an old draft of some TH400 oil pump technical information. JEGS 601181K GM TH400 Transmission Pan with Transmission Fluid, Transmission Filter and Gasket. TH400 blowing fluid out the vent. Pascal’s Law Pascal’s law states that when a confined fluid is placed under pressure, the pressure is transmitted equally in all directions and on all faces of the container. A flow diagram is a visualization of a sequence of actions, movements within a system and/or decision points. Anatomy and function of the choroid plexus. This diagram shows the flow of chemical fluids and the equipment involved in the process with the properties of flowing chemical fluids (like temperature, pressure, fluid. This item ships UPS. The process flow diagram (PFD) is a critical component of process design. Then remove the remaining bolts, and lower the pan to drain the remaining fluid. Cerebrospinal fluid (CSF) is a clear, colorless plasma-like fluid that bathes the central nervous system (CNS). The end is the arrow marked 38gpm to Process. 1973 Corvette Options. All three of these gearboxes have earned their stripes over the years, particularly the TH400 as the unit to rely on in a purpose-built drag car. If fluid is added, recheck the fluid after one to three minutes with the engine running. 1. Gwynn Oak, MD 21207. The following charts provide the mainline pressure readings for all of the various TCI® transmission models. The 4L80e transmission is a powerful and reliable GM tranny. Web the trans is a th400, it has 3/8 iff fittings coming out of the case. COA-23420 - TH400 FLUID OVERFLOW TANK; New. 10. Virginia Speed Built LSX 418. And regardless which would you use? Street use manual/rev shift body. TH400 Components. With a converter, it needs 10 to 11 quarts if completely dry. These stainless steel waterfall pumps are designed for. Here the orifice plate is used for the restriction in the direction of the fluid flow. FTI TH400 parts and accessories will help your transmission rebuild or repair go more smoothly. . In a parallel flow exchanger, both fluids in the heat exchanger flow in the same direction. Number-1 check ball missing. Over Flow-Catch Can Instructions. With a converter, it needs 10 to 11 quarts if completely dry. Use a switch that you are comfortable with and that has min. It uses a series of vanes very similar to the impeller. 88) AED 850 HO carb. In this paper, we present a density-based topology optimization method for a two-fluid heat exchange system, which. 2023 2 Comments. If not I'll have to check while its runnning. Each time the vane passes the pole of the. Web web th400 cooler lines diagram. Intermediate servo piston or pin stuck so that band is applied. The handle and ends are made from 6061-T6 aluminium then hand polished and chrome plated. Size of Converter. The factory training books I have for the 4l60e, 4T60/4T65e, and other transmissions show. Can someone guide me as to the correct connections for my TH400 Auto Tranny to the Radiator on my 69 Coupe BB? I am thinking the it should be as follows:. Blood flow is the continuous running of blood through vessels in the cardiovascular system (the mammalian cardiovascular system is shown in ). Here's what's changed and what might be coming down the road. It has better power flow for big power applications, much more clutch capacity and apply area than the 4L60E. ) If you want something that hold up to heat, then use Castrol Transyn. Recheck fluid and add as necessary. Design your flowchart like a pro. Types of fluid flow: definition and example [notes & pdf]Schematic diagram of the fluid-flow apparatus used for the hydraulic 4l60e fluid flow diagramProcess flow diagram circuit. Filter plugged. A loss of fluid leading to an. A forum community dedicated to drag racing drivers and enthusiasts. Follow this line to the left as it curves up until it reaches the vertical line corresponding to your flow's Reynolds Number. 430 A C TURBO HYDRAMATIC 250, 250C, 350, 350C 3 SPEED RWD (Lock Up & Non Lock Up) Revision 02/2018 Home > Tech Info > Trans Cooler Return Line Chart. As you can see in the diagram there is a pipe in which fluid is passing from one side to another side that is an inlet. 1971 Malibu, factory buckets/full gauges/console, 383 roller cammed small block, Turbo 400, 3. . R4 (4L60)/ 4L60E. 1972 Corvette Th400 Transmission Wiring Diagram PdfIt was time to look up Gearstar. 105K. 73. 47 $ 40. In this episode KD and I get the Th400 ready to run!!!Follow my instagram @youngchevytruck BearGFR. 1999 Trans Am WS6. Title: General Motors TH250, TH250C, TH350,. BTE™ 401100 Kit Contains: One (1) Turbo 400 Full Manual Valve Body. Since Google is your friend, type in "fluid path diagram for a GM TH400 transmission" and see what comes up. Note: This catalyst is located in the close coupled position. 00. It just doesn't make sense to run Type F which has poorer lubricity capabilities than a Dex style fluid. Neutral switches sell new for around $50. Register or Log In To remove these advertisements. Recommendations on the amount of transmission fluid to be used vary from one instance to the next on several factors, including the type of torque converter. A hydraulic system 3. As the chart illustrates, the TH200-4R uses a 2. 1K. The discharge of water from elevated reservoirs through long conduits such as for the fountains at Versailles suggested investigations about the resistance in relation to the. Excessive heat kills transmission and torque converter components . Fluid Out Vent Pipe. Lower radiator to upper radiator port out to external transmission cooler. When the full level is reached, make a short low throttle test drive to go through each gear manually and automatically to ensure function. When de-energized, the pressure port is internally connected to the “A” cylinder port, and the “B” cylinder portHydrostatic pressure arises due to the weight of a fluid acting on an object. In 200-4R applications, this kit can only be used in the 3-4 accumulator location. 772 A LIST OF ENGINEERING PROCESS FLOW DIAGRAMS AND PROCESS DATA SHEETS A. Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. And if the number of bolts is around 13, then it means the unit is either a TH350 or TH400. Not everyone on your team will have the time (or resources) to read through a complicated and lengthy process document. Started down the th400 pathTh400 tci th350 Th350 transmission diagramTh400 gd. Contracts pervade practically every area of an organization — human resources, purchasing, legal, etc. th400 cooler line in/outs. Sheet of Rev. com 33 Condition: Weak pump or clogged filter. The fluid pan on the TH400 has 13 bolts, while the TH350 has 11 bolts. Horizontal case Fitting. 37” long and comes in at a weight of 135 pounds dry. Top = Return/Out to top Trans line. 25-inches. 70 Gs. Automatic Transmission cooler line flow. Figure 14. Many companies offer rebuilts, which sell in the $600 to $900 range, but cores are usually required. Learn about different types of flowcharts and how they're used. Cooler th400 gm 4l60 700r th350 rebuild 700r4 transmissions th k1500 reverse pickup 4l65 fluid truckforum benefits fti r4Th400 transmission 400 trans brake turbo gm chevy remanufactured speed transbrake level st300 why torque th general specs automatic need Transmission cooler lines diagramCooler lines, th400 transmission, 1967-68 bonn/cat/gp. The TH350 has a TV (Throttle Valve) cable and the TH400 does not. 1 TUBE. More fully developed piping and instrumentation diagrams (P&IDs) are shown in a P&ID. Timeline Timeline Maker. Internal Leaks. Determine the friction factor (f D) for fluid flow in a pipe of 700mm in diameter that has the Reynolds number of 50 000 000 and an absolute roughness of 0. Additional “Nice to Know” information is at the outer ring. We do recommend, however, that the 12 volt be fused for safety. The main aim of process flows is to streamline and standardize business processes and provide a better understanding of business to the team. Billet Aluminum Powerglide Wicked Quick Valve Body®. 05 bar increments. jeepers creepers. Racing heavily stresses the transmission and causes it to heat very rapidly. 63. 50. After flowing through the transmission cooler towards the bottom of the radiator (where it is coolest) it returns to the TH-400's top fitting (inlet). 400 TH400 3L80 TRANSMISSION LINE PRESSURE BOOSTER KIT BY SONNAX FITS '65-'98 GM 3-SPEED AUTOMATIC. There were three levels of TH400 builds: Level 2 ($1,395) will hold up to 450 hp; Level 3 ($2,195) up to 550 hp; and the Level 4 ($4,395) package will handle up to 850 hp. The TH350 takes about 4 quarts in the pan and may require more fluid. Home; Th400 fluid flow diagram schools; Filter Type: All Education Study Best School Popular Searched › Karen rose sarasota school board › Connecticut high school basketball rankings › High school transcript philadelphia › Yale university high school programsThe TH-200 has rotating mass and static weight specifications similar to GM’s aluminum Powerglide, but with the benefit of three speeds and a relatively low 2. ε is the roughness height of the internal walls of the pipe and is published in many tables. Even the late-model LS guys have been seen rocking the classic TH400 on occasion. 22 DETERMINE friction factors for various flow situations using the Moody chart. These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse. COOLER RETURN LINE CHART CHRYSLER. Pumps and motors of every kind are drawn using a circle, as are measuring instruments. Using the pan bolt. A hydraulic pump is capable of making tremendous amounts of oil pressure. The traditional understanding of CSF physiology assumes that 80% of CSF is secreted by the choroid plexus into the ventricular cavities. ATRacing I Products TH400 SFl-approved ATI "Super Case" Helical low gear I - 4340 input shaft with aluminum forward drum Aluminum direct drum with 34 element sprag Extreme-duty clutches and steels Blueprinted high-flow pump Deep aluminum pan Reverse-manual valve body Fluid overflow catch can 2. so should the lower port go to the top or bottom on my cooler. I would double check the size of the fittings on the radiator, and see about finding some smaller fittings for the trans, and run 5/16" line. Top port on the TH400 is the outlet and connects to the bottom port on the radiator. 1. Lower port on cooler. 14. What that means is the pump gears are turning & sucking, but the fluid simply can't get there fast enough and a void is created where the fluid should be. The cycle of an ideal gas Carnot refrigerator is represented by the pV diagram of Figure 4. The resistance offered by a fluid to flow is known as viscosity. 48:1 first gear. 34 (a) Laminar flow occurs in layers without mixing. In this instance, the accumulator piston is absorbing 2 nd apply pressure by working against a spring and throttle-sensitive fluid force, which is provided by the accumulator valve as it regulates D4 pressure into the 1-2 accumulator circuit. Ok, my trans cooler is mounted in front of my radiator, with an inlet on the passenger side upper (facing the grill looking at the engine), and passenger side lower side of the cooler. Check and add as necessary. How to Assemble & Install the TH400 Smart-Tech Drum Module. By maintaining on demand pressure and flow, internal leakage is reduced, and the system generates less heat. Figure 9 represents the directions of fluid flow in the parallel and counter-flow exchangers. transmission fluid before installation. ATI now has an answer for this market and offers three variations of a 2-speed Turbo 400! OEM cased units are rated to 1800 HP and not intended for heavy weight cars. The highest GPM we have ever recorded on a TH400 was less than 8 GPM. Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. Friction factor is plotted vs. The Venturi effect demonstrates how fluid speed increases and pressure decreases in constricted areas. Recommendations on the amount of transmission fluid to be used vary from one instance to the next on several factors, including the type of torque converter. Turbo Hydramatic 400 (TH400) General Camaro Transmission Information The 6 cylinder models came with Saginaw 3 speed transmissions. 87 $ 18. Block was decked to 8. (b) An obstruction in the vessel causes turbulent flow. Running pump low on water will cause overheating, premature failure and will void warranty. TH/3L80/ 3L80H. Oil Pump Assembly. com. Hi Guys I was wondering if anyone could tell the direction of the fluid flow on a turbo I think it is top in,. Email. Part Number. 4 lbs with solenoid, adapter, filter and spacer. The TH400 has been rated at 450 ft. The Turbo 400 transmission, known officially as the Turbo-Hydramatic and commonly referred to as simply the TH400, was part of a family of automatic transmissions developed and produced by GM. Simplified or conceptual designs are called process flow diagrams (PFDs). ATI now has an answer for this market and offers three variations of a 2-speed Turbo 400! OEM cased units are rated to 1800 HP and not intended for heavy weight cars. CK5 has since expanded to include the classic C/K series GM Truck and Suburban as well as past and present GM models. Note 1 to entry: The diagram type process and instrumentation diagram, used in this part of ISO 15519, is technically identical with the piping and instrumentation diagram. Counter flow heat exchangers are the most efficient of the three types. One type of system that is sometimes used in hydraulically operated equipment is the open-center system. Multidisk clutch packs or lockup bands 6. 8 lbs as is, and 8. This placement is aimed at providing the best power ratio and durability for rear-wheel drive. If your trans-brake shows a delay or has a hesitation when it releases, the first place to look is the transmission fluid. 3 shows that each major piece of process equipment is identified by a number on the diagram. Note the depth of the old bushing and make sure to drive the new bushing to the same depth, and line up the lube oil hole at the same time. Cools. This is Bernoulli's equation! It says that if you add up the pressure P plus the kinetic energy density 1 2 ρ v 2 plus the gravitational potential. Tailshaft. #4 · Jul 20, 2017. 27 15/16 in. You can get Dexron VI at Walmart for $4. The eight-speed transitions the gear ratio chart is even deeper by using a 4. Off Unless otherwise stated, fluid properties are for mean fluid temperature. Handle it with care, and store it . 69-86 TH350. The Turbo 400, also known as the TH400, is a popular automatic transmission used in many classic vehicles. Internal Leaks (Clutches). 37 inches long, usually positioned at the center of the vehicle behind the engine. A worn-out TV cable or a faulty adjustment is another common issue on the 700r4 transmission. TH400 fluid change questions. Significantly lighter than both the TH-400 or TH-350, the TH-200 can provide performance benefits to cars previously using either heavier 3-speed units or. To understand it, the Moody diagram may be broken down into four zones: Laminar, Transition, Partially turbulent, Fully turbulent. It was designed with a three-element turbine torque converter mated to a epicyclic planetary geartrain, thus delivering three forward speeds plus reverse. Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. If required, correct the setting. I just looked in my "How to work with and modify the Turbo Hydra-Matic 400 Transmission" book. A904 transmissions were original equipment on all 170, 198 and 225 six-cylinder engines, as well as the 273, 318 and 360 (two-barrel) V-8 engines until 1978. Check circulation/filter pump for problems. Table with information about every model. The top transmission line runs to the top of the radiator. The rotational motion of the rotor is proportional to the rate of flow and is sensed by a reluctance-type pickup coil. 74:1 First-gear ratio which is deeper than a TH350's ratio but not as deep as the TH700-R4's 3. Properties of Steam – Steam Tables. 29 per quart (Super Tech brand). $59. Although not a requirement, this data supports the complaints. In simple words it is the movement of mass per unit time. in a safe location. For TH400, the amount of transmission fluid it takes is 6 quarts in the pan. 4 lbs with solenoid, adapter, filter and spacer. g. Used to be able to get a little booklet right from the GM parts counter. Description. Step 1: Pop the Hood: Before checking the transmission fluid, open the hood and locate the transmission dipstick. The capacity of the Th400 transmission fluid, when the unit is dry, is around 6 quarts. (s) Item Name No. In symbols, this is written as. If not I'll have to. A permanent magnet is encased in one or all of the rotor vanes. Since then it has grown to be a leader among full size Chevrolet K5 Blazer and GMC Jimmy web sites across the Internet. Schematic and Diagram Full List. Be the first to review this product . One (1) Pressure Regulator Spring. There is a difference in size between the Th400 and Th350. Powerglide (PG) 8-10 quarts . Process flow diagram. Th-400 Intermediate Band. Closed-center pressure and flow-compensated hydraulic system with load sensing reduces unnecessary engine load and improves fuel efficiency by providing pressure and flow only on demand. Or in other words, a venturimeter is a tube with a constricted throat that increases velocity. Wish List Compare. The TH-400 will benefit from a little insulation around the pan in extremely cold. 840 Rec Heads (2. Using a 12-point 3/8-inch socket, remove the center support retaining bolt. 01. During injection tests and falloff tests, fluid is injected into the formation, and BHP, which. Recommended Fluid; Powerglide, TH350, TH400 200-R4, 700-R4, 4L60, 4L60E: Dexron III (H) 4L60E, 4L70E, 4L75E, 4L80E, 4L85E, 6L80E:. ATI SuperCase recommended over 2000 HP! 2-Speed Max-Duty Outlaw T400 Transmission 1,800 to 3,000 HP Max rating, depending on options. 75-inches, is a little longer than the short tail TH400 at 28. Before I took the tx out, I. It can be used to predict pressure drop or flow rate down such a pipe. There is a process flowchart, swimlane flowchart, workflow chart, data flow diagram, EPC diagram, SDL diagram, process map, decision flowchart, among others. Its diagram, definition, parts, working, formula,. 888. You. Remove the driveshaft. Top. Because of its aluminum and iron construction, it weighs in at 135 pounds without fluid. 13 in. This type of diagram provides a general overview of individual tasks and objectives without getting into too much detail. TH200R 10-12 quarts . Continue down the arm, always moving the skin upward. stuarta. 67 Chevelle Malibu SS Cdn. #1 Hey guys! does anyone have a chart or diagram with th flow-direction of the fluid inside a TH400? I don't mean to ask what port is the in- or outlet for the radiator,. This video breaks down Bernoulli's equation, revealing the surprising principle that faster fluid equals lower pressure. This page provides the Appendix containing graphic symbols for fluid power diagrams from the U. You want the hot fluid to rise to the top of cooler. Some cars that used the 4L80E transmission include Chevrolet/GMC pickups, commercial vehicles, and vans. Trying to find something that maybe will help (not that it heats up normally, but after a few passes on the bottle. The 4L60e weighs 133 pounds without transmission fluid, and the TH400 tips the scales at 134 pounds. Titanium Bolt option saves another 1/2 pound!Recommended service interval – change fluid every 5,000 miles depending on severity of duty. Adjust the flow control valve in a step-wise fashion to observe the pressure differences at 0.