Since more planetary gears distribute the load over a higher number of parts, the four-pinion type is naturally stronger. Stalling for Speed: Be Realistic Next to a re-programmed valvebody, nothing transforms TorqueFlite performance more than a higher-stall torque converter. Because the transmissions were shifted by , the transmission had a reverse blocker valve that shifted them into Neutral when drivers accidentally punched Reverse while moving forward. You can follow Jefferson on Facebook Jefferson Bryant , Twitter 71Buickfreak , and YouTube RedDirtRodz. We spent an entire day rebuilding the 727 in a transmission shop. Stage 2 Chrysler TourqueFlite Transmissions The dependable workhorse of Chrysler for over 40 years, these TourqueFlite units get a thorough rework with high performance race clutches and wide bands, high performance Transco shift kit and too many other upgrades to list.
Like an engine block, the transmission case is subject to a degree of physical distortion under heavy load. This was a major boon for drivers, making the powertrain more responsive to sudden demands for more but not full-throttle power. There are 4 major designs on 727, most of the internals are the same, but there were changes along the way that require specific parts and setting for that year range of transmission. Both of these fluids are natural Petrolium based. The TorqueFlite also adopted variable line pressure for reverse, which could range from 150 to 260 psi, rather than staying at 260 psi. Three or four times doing this fixed my problem. As seen here, levers with 2.
Shift transmission into reverse and let run approximately 3 minutes. Convert the Stock Front Drum to 5-Clutch Hemi Specs The front drum handles power flow in Drive gear so any extra load-bearing surface area is good. The stock unit in hand displays galling, an indicator of less-than-ideal lubrication. In 1989 and 1991, integral overdrives were added, resulting in the A-500 based on the A-904 and the A-518 based on the A-727 ; the engine computer controlled an electric overdrive unit built into the extension housing. 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! Remember to soak all of your clutches in transmission fluid for thirty minutes before you install them. Full manual valve body - Reverse Shift pattern. The TorqueFlite was not just used by Chrysler; it was adopted by luxury automakers , , , Aston Martin, Maserati, and , as well as domestic rival and commercial-vehicle makers International Harvester, Land Rover, Iveco, Karrier, Matbro, Stonefield, Sirmac, Boss Motor, and Mitsubishi.
The unit on the left has fifteen spring locating pins and is common to 383 four-barrel and larger engines. The reverse servo simplifies the application and eliminates the breakage issue. Even used ones are in demand. On the other hand, slowing the band application too much can lead to flare slippage. Ron says it is vital to check the transmission fluid level with the fluid warm and the engine idling in neutral. All Torqueflites had the same internal ratios, until, starting in 1980, a wide-ratio gearset was created for most of the 998 and 999 transmissions 2.
Our rebuild kit came with blondes, but we swapped those out with some Alto hi-energy clutches. Note: Performance Automatic Chrysler transmissions do not include the driven gear for a cable driven speedometer or vehicle speed sensor. Finished off with a deep sump pan and complete dyno testing, and you will have a Chrysler 727 transmission unit backed by a one year warranty. Any increase in load-bearing surface area gets more power to the tires. Application Built for drag racing, off-road, tractor pull, and limited street. All the front-drive transaxles on non-turbo engines except for one used with the 2.
The stock drum explodes above 12,840 rpm. Valve body- The stock valve body is more than capable of handling its job in a performance transmission, but it needs some tweaks. Rated to handle up to 750 horsepower. We set out to show you a few of the tips and tricks for building a high-horsepower 727 transmission. All Street Smart Systems come complete and ready to install. At the time, the rear-drive version of the TorqueFlite transmission had a non-electronic lockup. The differential gear ratio and rear tire diameter are required to purchase this item separately.
The billet steel retainer is also vastly superior to the stamped stock unit. These torque converters have the ability to multiply the engines torque during the stall phase. For our 727, we went with an overseas Kevlar band because they are just as good as the Raybestos brand, but less costly. For ours, Trans-Go dictates tightening the threaded studs to 72 in-lb then backing off two full turns front servo and 2. Too loose, and it slips. Your Legs Might Thank You. In 1977, a low-slip torque converter, pictured above, increased the rea of the oil path from the impeller to the turbine and back by way of the stator by 20%, cutting friction while increasing torque capacity.
A clutch on the other hand, simply is along for the ride by connecting the engines power to drive-line. Moving up the chain are high-energy clutches, Red Eagles, and Raybestos Blue Line. We do not recomend synthetic transmission fluids. These could be used on past transmissions. Street Smart Packages are not intended for all out race vehicles or for extended use above recommended horsepower ratings. There are two main types of steels- stock and Kolene. .
The backbone of Chrysler for over 40 years these units get a thorough rework with High Performance Racing clutches and bands, high performance shift kit and too many other upgrades to list. If these break, you lose the ability to drive, which happens a lot on these transmissions. Product Details Skip the endless searches. Powered by a 470hp 496-cube low-deck that makes 523 lb-ft, and packing 3. Many 1978 rear drive cars also had a major new addition: , which used a mechanical lock instead of the usual fluid interface in the torque converter. Or you can buy a valvebody reprogramming kit and tackle the job yourself. Improved High Gear Oil Supply The stator support is fed oil from a single quarter-inch hole pen points.
Flashes to 3,700 are expected. Ron is also a believer in synthetic automatic transmission fluid and says the old standard Type-F is outmoded today because it breaks down and foams more readily. Its 510hp runs directly into a lightly modified 1963-vintage push-button 727 TorqueFlite packing three-pinion innards like these. It is important to assure that the bushing is pressed in all the way to the machined chamfer on the front side of the pump housing, which faces the spinning torque converter in operation. On the left, pens point out the wider bushing and load areas. We retained the stock 10-spring apply piston. Likewise, a pawl was added to the 904.