3 speed tranny leaking? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sonicman · 09-09-2010, 09:23 PM

My 3 speed manual tranny is leaking fluid inside the bell housing. It seems to be leaking where the bell housing connects to the tranny. I don't believe it is the rear main seal on the oil pan. I just don't know what I'm looking. I know nothing about this area of my truck or anything about transmissions. I need some old truck wisdom please.

Dark Knight · 09-09-2010, 10:52 PM

If it smells like 80W-90 (stinks really bad), it's probably the input shaft bearing retainer seal. Not too terribly bad to get to, just pull the trans, remove 4 bolts on the bearing retaining collar and pop the seal out. Let's hope it's not the rear main...

Sonicman · 09-09-2010, 11:29 PM

Thanks Dark Knight. Is that something that can be fixed? Will someone like O'Reily's have the parts?

Wrenchbender Ret · 09-10-2010, 03:36 PM

Easy fix. After you pull the trans. You remove the 4 bolts holding the front retainer & remove the retainer. Do not try to remove the shaft. The seal is in the retainer. If the gasket is not torn you can reuse it. The seal is avail at the local parts store.

09-09-2010, 09:23 PM	#1
Sonicman Registered User Join Date: Jul 2010 Location: Denton, TX Posts: 155	3 speed tranny leaking? My 3 speed manual tranny is leaking fluid inside the bell housing. It seems to be leaking where the bell housing connects to the tranny. I don't believe it is the rear main seal on the oil pan. I just don't know what I'm looking. I know nothing about this area of my truck or anything about transmissions. I need some old truck wisdom please.

09-09-2010, 10:52 PM	#2
Dark Knight Registered User Join Date: Dec 2008 Location: Pleak, Texas Posts: 420	Re: 3 speed tranny leaking? If it smells like 80W-90 (stinks really bad), it's probably the input shaft bearing retainer seal. Not too terribly bad to get to, just pull the trans, remove 4 bolts on the bearing retaining collar and pop the seal out. Let's hope it's not the rear main... __________________ -1967 Chevrolet Fleetside LWB- 350 V8 w/thumpr cam, NV3500, 3.08 gears, A/C, PS -1983 Chevy Silverado C1500- 383 stroker, TH400 -1989 Chevy Silverado K1500 SWB- 5.3L swap, 700R4, 3.42 gears -And a '66 Ford Mustang- 200 I6, C4 trans, rust bucket "The only thing we have to fear is fear itself." -FDR (and maybe rust too) You've gotta be able to stop and steer before you can go fast!

09-09-2010, 11:29 PM	#3
Sonicman Registered User Join Date: Jul 2010 Location: Denton, TX Posts: 155	Re: 3 speed tranny leaking? Thanks Dark Knight. Is that something that can be fixed? Will someone like O'Reily's have the parts?

09-10-2010, 03:36 PM	#4
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,204	Re: 3 speed tranny leaking? Easy fix. After you pull the trans. You remove the 4 bolts holding the front retainer & remove the retainer. Do not try to remove the shaft. The seal is in the retainer. If the gasket is not torn you can reuse it. The seal is avail at the local parts store.



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