When it comes to a racing transmission, we would consider this 904 to contain the minimum modifications necessary to handle a moderately powered, somewhat heavy drag car. Choose from all of the popular transmission models such as 904 and 727 automatics and A833 4 speed manuals. These units were all cast iron. The Overdrive bell housings use a unique clutch fork mount that you will not find on regular three speed or four speed bell housings. A 904 Race TorqueFlite to back up a powerful late-model Hemi Of all the components that make up a Mopar performance vehicle, the automatic transmission is likely the least understood both by the general public, enthusiasts, and even some mechanics. The length is also shorter than the 727 so if you want to swap in a 727 for your 904 drive shaft shortening is necessary. On top of all that, the hole in the lever that the linkage rods fit into changed in diameter at some point during the four speed shifter years.
In this case, you could simply purchase a 4. I have a Aston Martin Virage Volante of 1994 with a 4-speed transmission A-727-A 4, no overdrive, just for gears the car have 35. The trans-brake uses an electric solenoid to actuate the reverse band while the shifter is in first gear, and once the button controlling the reverse solenoid is released the car almost instantly leaves the line. With the exception of a single bolt, the bell-housing pattern is the same, but the rear crankshaft flange of the late-model Hemi protrudes further aft than that of a small-block, requiring either a spacer or special flex-plate. Your hub for horsepower Get first access to hit shows like Roadkill and Dirt Every Day Join free for 14 days now Finding a 727 or 904 in a scrap yard is relatively easy. And while some may argue that a 727 would be the logical choice for this application, we picked a 904 for its lighter total weight and lower internal friction.
If you had a much longer yoke like I did, could you just have a machine shop cut off and redress the yoke instead of cutting, rewelding and balancing a driveshaft? This ring must maintain the hole's exact center! This way I can go to the junk yard and pull a valve body from another 727 transmission. Additionally, the A-body Overdrive A-833s used a different 3rd-4th rod to accommodate the up-side-down shift operating lever. Again, no information, but likely a barrier to swapping the transmissions and the resultant carnage it could create. Mopar has re-released the 10. The late-model Hemi crankshaft also utilizes eight bolts to hold the flywheel or flex-plate, but the spacing and bolt-circle is different than early Hemis. It also controls a relay to the aux electric fan and cuts it off at 28 mph. For drag racing applications a solid non-lube design U-Joint is recommended because of the tremendous initial shock load, or short duration of high torque the joint must be able to withstand.
Then I put it side by side with the old driveshaft and the transmission yoke was quite a bit longer. To handle the task we enlisted local Mopar shop and transmission specialist Tod Struck of Inline Performance Specialists. This is a 1975 number, no doubt later bell housings used other numbers. The cross member mount flange is the 2 bolt pad on the bottom of the tailshaft that serves as a mount point for the cross member. The good news is that the torque converter register remained the same size as it has been since the mid-sixties! Chrysler installed the 833 four speed behind the Slant Six at two different times.
He's gonna have to drive 200 miles to my house for me to do the swap. It's the same as the 68 Barracuda shaft, only longer. A 1963-67 flywheel must be used with a 1963-67 crank and a later flywheel must be used with a later crank. The other important change at this point is the new for 1965 slip yoke on the propeller shaft replacing the ball and trunnion design. As I recall, the Ujoint book listed about 30-40 different adapter style ujoints.
The six-speed manual from the Vantage also became optional late in the Virage's production run. The casting numbers for the early cast iron bell housings are 2463025, 2463027, and 2468431. Why not eliminate the hassle once and for all? A much cheaper and plentiful bell housing to use is the 1975-81 A-833 Overdrive Slant Six bell housing. I have it set for 28mph- below that the trigger to the relay is cut and the trans unlocks. The pinion part numbers found on Tom's site is outdated but can be cross-referenced by your Mopar dealer. As far as strength is concerned, outside of the input shaft, the input bearing, the retainer and some special gear sets, there were no additional measures added to A-833s for Hemis. They can Mic it for you, and check the books to see if what you need is available.
Torque converters: 360 Torque converter balance kit part number: P4120241. A stiffener plate, Torque shaft bracket shown below, is also welded to the outboard driver's side frame rail just behind the front suspension area. Whether you go that route or install a used '64-up pan, save yourself a bunch of current and future hassle: discard the floppy cork or rubber pan gasket that comes with the filter kit. Just trying to get everything lined up beforehand. There is a difference between the small block and the big block cases so they do not interchange. These can currently be purchased from.
Gerd Thank you very much! The '66-up filters have only one, and if you use them on a '65 or earlier transmission, you'll starve the rear pump and damage it; it'll get noisy. This kit includes all the normal high-quality pieces needed to rebuild our 904, including the clutches, steels, bands, seals, gaskets, and even bushings. That's my question, why so much difference in length?. Keep in mind that this was done using bellhousing casting 2468372. Some auto machine shops that make truck driveshafts have this equipment. The drive shaft yoke on the 904 series transmissions is smaller than the 727 so they are not interchangeable. Both '64 and '65 models carried the flanged output for the ball-and-trunnion style universal joint.
You will need transmission type, Rear U-Joint Series and shaft measurements. This valve body requires some internal modifications to the transmission to work properly, but Tod at Inline Performance Specialists handled the mods with no problems. Just curious about the different lengths. Appropriate horse power range is up to 500 in circle track or road racing, small tire drag racing and 4×4. Also available: Performance Dynamic Cryo Joint.
. If Pinion Yoke does not have Placement Tabs that retain U-Joint, measure from flat of yoke inside to inside. Another option is to leave the back-up light switch out and stick a thin probe through that hole to help align the fork to the cover lever detents. The overdrive gear is very small and as a result, the mainshaft journal and splined hub is smaller. Thank you in advance Torqueflite 727 4speed in a Aston Martin Good mornig from Germany! I knew that I needed to shorten the driveshaft to account for the differences in the required length. I found your forum while i searchd for torqueflite 727 Gearbox.