When the governor signal moves the 2-3 shift valve, fluid is applied to the release side of the front servo and the front clutch is applied. It was equipped with five direct friction plates. Trans fluids for mid 80s and later cars had a reduced temp tolerance due to transmission lock-up features which greatly reduced transmission temperatures. The A727 incorporated a parking pawl, with the sole exception of the 1962 Chrysler version, which had an extension-mounted drum brake. Along with application of the front clutch, fluid is directed to the low-reverse servo, which locks the low-reverse band tightly around the low-reverse drum-rear planet carrier assembly. Both the input shaft and the output shaft were heavily scored where the thrust washer rode between them.
The bearing supports the loads imposed on the output shaft by the internal mechanisms of the transmission, and maintains the correct end play in the gear train. Engine torque can now be transferred through the transmission. Our rebuild kit came with blondes, but we swapped those out with some Alto hi-energy clutches. Not only were automatics originally used for general driving comfort, they quickly found a place in competition vehicles. By following simple recommendations available from Transgo, a home mechanic can really assemble a neat package. These units are configured to meet or exceed current offerings in the market place.
Many car parts stores sell a funnel with an attached hose, which fits perfectly into the tube. If you are interested in more detail than I have given, get the. The pan and filter were updated during the 1998 model year with some Dodge applications which has a deeper oil pan and a redesigned oil filter which is held with 2 valvebody screws the single oil port filter does interchange with the older A500 and A904 derivatives along with the oil pan. Once the plates and discs are locked in the rear clutch assembly, power can be transmitted through the input shaft, to the locked clutch-pack and to the front annulus gear see planetary assembly photo. This creates a sprinkler head effect and much improved oil flow. Usually the higher performance transmissions use a 3. This is what you would find in a stock transmission and stock rebuild kits.
Part-throttle downshift functionality was extended to V8 A-904s in 1969, and to most A-727 transmissions in 1970 to 1971. Many thanks to David Frey, Vicki Milley, Debbie Hoflo, and a very special thank you to Tom Mallot for his photographic help. Fireball Performance Automatics in Williamsburg, Ontario has converted these to shift via cable linkage, allowing owners of older cars to update while keeping their. I am wanting to build a awesome auto transmission with reverse manual valve body for a large horsepower big block stroker motor with taller gears to enjoy the auto like a four speed without the need for a clutch, due to needing a knee replacement on my left knee. The pins locate coil springs, which help engage Drive gear. His career began in the car audio industry as a shop manager, eventually working his way into a position at Rockford Fosgate as a product designer. Well it worked just fine, the car shifted as it was supposed to, didn't slip, and never overheated again.
Hand walks you through the TorqueFlite rebuild with color photos showcasing step-by-step procedures with highly detailed, easy-to-follow text. Reasons for Modifications Stock Torqueflites, since the very beginning, have been very reliable. All the front-drive transaxles on non-turbo engines except for one used with the 2. These and other driver errors can explode the over-running clutch unit also called the sprag and send shrapnel through the floor and through the headliner! This will fill the converter which gives a quicker vehicle response. Great photos and detailed instructions make it much less intimidating to start ripping apart your transmission for a rebuild. Looking at this in order, it happens like this: The front clutch is appliedm transferring engine torque through the sun gear driving shell, driving the sun gear in the same direction as the engine.
The upgrades were already present on the Road Runner trans. For our 727, we went with an overseas Kevlar band because they are just as good as the Raybestos brand, but less costly. The block diagram 1 has the converter and pump shaded to show they are the only units in operation. This vitally important cast-aluminum item supports the rear drum. Up to that point in time, only the Powerglide was seriously used in G. The flexible bands are flimsy and suffer from spot-welded band anchors. Slow to get a fully automatic transmission on the market, Chrysler wasted no time in getting past its two speed.
Direct Drive is named for the fact that engine speed is transferred directly in a 1:1 ratio through the transmission. Torqueflite automatic transmission: major components by Tom Hand Courtesy of the with our most sincere thanks. In Mopar circles, they have become synonymous with strength, durability, and performance. Beware, the valvebody is a complex item and reworking is often beyond the skill set of the novice. Two cast iron sealing rings, the governor body-park pawl assembly, and the governor valve-governor weight assembly all work together to send the governor signal to the valve body to tell it to operate various shift valves, controlling up and down shifts.
You should not attempt to rebuild an automatic transmission using a 4-page magazine article; you need a real tech book that is dedicated to that particular transmission. The book covers some history and identification, along with operation, troubleshooting, disassembly, component prep, assembly, torque convertors and performance mods. This particular servo piston is called a controlled load servo; it cushions the three-two downshift. Performance Automatic's Comp Transmissions combine the latest technology and track proven durability to provide the drag racer with a product he can rely on round after round and season after season. We upgraded our servos with a set of billet servos from our local Transtar transmission component supplier. Personally, I don't think it really makes that much difference.