When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Now that the new windshield is in and the car is back on the road, I've noticed a very slight leak of manual transmission gear oil. I've topped it off, and it wasn't that low. Looks like it might be coming from the back of the transmission where the driveshaft connects. Anyone know if this is a common problem and what is involved in the fix? I assume there is a rear seal there, but just noticed this yesterday evening before a drive with the roofs off.
If I'm noticing this, it's a good bet at least a few folks on this forum have already had to deal with it. Any comments or help appreciated...
It is a common problem for a car that hasn't been driven in a while. I am not sure on your specific transmission, but typically involves removing the driveshaft, removing the seal and then installing the new one.
St. Jude Donor '11-'12-'13-'14-'15-'16-'17-‘18-'19-'20-'21-'22-'23-'24
To be sure it is actually the rear seal, I suggest cleaning the tranny and then checking for leaks after a short drive. All tranny fluid leaks will appear at the rear since air flow will push it there while driving.
If the rear seal is in fact leaking and you do decide to change it, (not a terribly difficult job) by all means check the condition of the tailshaft bushing(upper left below).
If the bushing is worn excessively, the new seal will not last long. As you withdraw the driveshaft yoke from the tail housing of the transmission it should have little or no lateral movement until just before it pulls free of the seal.
Assuming this is a 32 spline output shaft ST-10:
Rear seal is a Chicago Rawhide p/n 18662 or National p/n 3946; which has literally 3 pages of interchange part numbers (AMC, Chrysler, GM, Ford, New Process Gear and several industrial pieces).
Assuming this is a 32 spline output shaft ST-10:
Rear seal is a Chicago Rawhide p/n 18662 or National p/n 3946; which has literally 3 pages of interchange part numbers (AMC, Chrysler, GM, Ford, New Process Gear and several industrial pieces).
Rear bushing is a p/n 3941 or Clevite 02745
Some of them left the factory with Saginaw transmissions in them as well. Would these also use the same seal and bushing?
Assuming this is a 32 spline output shaft ST-10:
Rear seal is a Chicago Rawhide p/n 18662 or National p/n 3946; which has literally 3 pages of interchange part numbers (AMC, Chrysler, GM, Ford, New Process Gear and several industrial pieces).
07-28-2015, 04:30 PM
1978 SA Edition 4 Speed Manual Minor Leak
