This ball-check valve lets that fluid that is under pressure from the clutch assembly spinning and throwing the fluid out due to centrifugal force out of the clutch cylinder or drum. This book is really well put together and extremely thorough, and definitely a must-have if you plan on taking on this kind of project. The fluid level should be at the full mark on the transmission dipstick, or slightly below it — definitely not above Full. The new automatics were only used on pickups and Jeeps, while cars got more advanced and more troublesome units. I promise you that the next transmission I have to replace or any other person I hear of needing a transmission I will be heavily promoting Monster Transmission and tell them that I personally use Monster Transmission.
Introduction to the TorqueFlite The automatic transmission is a convenience item for most people. In Mopar circles, they have become synonymous with strength, durability, and performance. The 904 uses different kickdown bands to hold the front clutch retainer drum during second gear. Now torque is applied to the front annulus gear by the rear clutch and torque is also applied to the sun gear driving shell by the front clutch the driving shell is attached to the sun gear. As the rotor spins, fluid is picked up in this gap and is forced out where the teeth are meshing creating pressure to drive the fluid through various passageways of the pump body The 904 pump is physically smaller and the pump body and reaction shaft support each make up one-half of the pump body assembly.
As the input shaft turns 2. When the sun gear and the front annulus gear spin at the same speed the planet carrier has to rotate at that speed gear train rules dictate that when two members of the same gear rotate at the same speed, the whole gear set rotates at that speed. The A-727 and A-904 were very different from the A-488s, sharing no parts. The only special tool required is a clutch pack spring compressor. With bracket racing coming alive in the 1970s, it has been almost mandatory to have a good automatic in 90% of the classes if you want to be consistent and win races. This was with a front clutch retainer that still had the narrow bushing, proving that reduced end play plays a greater role in preventing failure than the wider bushing. This is done by a piece of linkage that connects to the parking gear lever and the valve body manual gear lever.
The book also goes over troubleshooting and preparations and much-needed information before beginning. Again, these firm, properly timed shifts eliminate slippage of friction material during shifts. Torqueflite automatic transmission: major components by Tom Hand Courtesy of the with our most sincere thanks. Apply the parking brake firmly with the engine at idle, then shift into each gear, momentarily ending in Neutral — not Park. This particular servo piston is called a controlled load servo; it cushions the three-two downshift. Please contact us for details and pricing if you do not find what you need on our website. Do I have a 727 or a 904? When the vehicle is stationary, the over-running clutch will hold the drum, but when the vehicle is already out of low gear, the drum is free wheeling and can only be stopped by the low-reverse band.
Below it are the cooler line fittings, the shifter shaft seal, and neutral start switch. If you want it strictly original, no. I'll give my recommendations shortly. The right stall speed 904 torque converter for your exact application will insure maximum performance and long trouble free service. The output shaft has four sets of splines cut into it.
But if you want added reliability and performance and you have some mechanical skill or a friend that does, set aside a couple of hours and start on your transmission. Introduction Of part one of this series has been read, it will probably be bringing up a few questions as to why a Torqueflite could be so well designed yet still need modifications. These transmissions were coded A-488s and were standard on 1957 Imperials and other Chrysler models. The shield is made to fit with stock or deep trans pans holding up to 2 additional quarts of fluid. Because the A-500 and A-518 were essentially made by adding and an overdrive planetary gearset to the A-999, gear ratios were not optimal; they were not redesigned to match the torque curve and torque rise of the mated engine.
Usually the higher performance transmissions use a 3. When it shifts from 1st to 2nd its got a really smooth shift and it puts a smile on your face. The TorqueFlite also adopted variable line pressure for reverse, which could range from 150 to 260 psi, rather than staying at 260 psi. When installed in Dodge trucks and vans, the transmission was marketed as LoadFlite. Your 360 produces more torque than a 318 , and couple that with the fact you've given it a mild build would account for the higher stall than a stock 318. The other type of servo assembly does not use an internal spring-piston assembly, and is usually found in high performance applications where soft shifts would be detrimental.
The kickdown servo assembly consists of the retaining snap ring, cast iron seal ring, the aluminum pin guide, the large servo return spring, and a controlled-load servo with its cast iron rings below it. Pat Blais was working on this last time I talked to him about five or six years ago. Not shown is the filler tube and the dipstick, used both for checking the level and for filling the system. Too loose, and it slips. Whether you need a torque converter for towing, street performance, street and strip use, pulling events, or all out drag racing, we have the right stall speed converter for your project. The rear pump was eliminated, which simplified and cost-reduced the transmission but rendered push-starting impossible; Chrysler engineers reasoned that improved electrical and fuel systems reduced the need to push-start vehicles, and safety concerns weighed against doing so. These changes have been incorporated on A-904s and 727s since 1966.