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Sticky Chasing and Solving Powerflite and Torqueflite leaks - Back of trans
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   Forward Look Technical Discussions -> Transmission and Rear AxleMessage format
Posted 2022-01-12 8:16 PM (#618352)
Subject: Chasing and Solving Powerflite and Torqueflite leaks - Back of trans

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Posts: 9894
Location: Lower Mainland BC
The Powerflite 2 spd automatic transmission was introduced in 1954 and it soldiered on until at least 1961. The 3 speed cast-Iron A-466 Torqueflite was an evolution of the 2 spd Powerflite and,
as such, shared more than a few parts. It started in late 1956 model year in some Imperials and Chryslers and became more available in 1957. It too soldiered on until 1961 when it was replaced in
the 1962 model year with the aluminum case "727" Torqueflite.

This post relates to leaks that could come from the rear of either a 1954-61 Powerflite or 1956-61 cast-iron Torqueflite. Nothing to do with the 1960 "904" Torqueflite.

The main source of potential leaks from the rear of these transmissions would be the rear seal on the output shaft. The good news (sort of) is you shouldn't have to
remove the transmission to replace the seal. That said, you will have to remove the emergency/part brake drum and everything involved with that brake.

You need to remove that drum (etc) on the end of the output shaft

You will need to first remove the driveshaft so you can then remove the big nut at the end of the output shaft.

Then with the eBrake mechanism removed:

You will now be staring at the leaking culprit, the output shaft seal:

The early rear output shaft seal was PN 1671 763 which seems to go to a Timken 8160S and others (see below). This stayed with both the Powerflites to the end and until
1959 for the Torqueflites when there was a new number 1824 075.

That 1671 763 rear seal stayed with the Powerflite to the end. It was also the Torqueflite rear output shaft seal until almost the end
in 1961 when a different seal was specified (I don't know why) (??)

One of the listings for the OE seal was Chicago Rawhide/National 7588:

Edited by 56D500boy 2022-01-12 8:44 PM









Attachments 56DodgePowerfliteOutputShaftShowingRearSeal_7588.jpg (95KB - 159 downloads)
Attachments 1961PowerFliteRearOutputShaftSeal1671763.jpg (117KB - 157 downloads)
Attachments 1671763TorquerfliteRearOutputShaftSeal.jpg (167KB - 159 downloads)
Attachments 1959MoparTorquefliteRearOutShaftSeal1824075.jpg (131KB - 157 downloads)
Attachments 1961MoparTorquefliteOutPutShaftSeals1942401and1824075.jpg (141KB - 154 downloads)
Attachments Mopar1671763ToSKF15620Details_ShowingCrossOver.jpg (116KB - 159 downloads)
Attachments PFRearOutputShaftSeal1671763ToTimken8160S.jpg (109KB - 156 downloads)
Attachments SKF13535EquivalentTo1824075RearSeal.jpg (85KB - 156 downloads)
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