Transmission Fluid Leak - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bluec10 · 11-12-2003, 12:54 AM

I asked this question on the 67-72 board, but I thought I'd ask it again here in case someone with a newer truck has some experience with it.

My '76 has a TH350. After putting in a new engine, I noticed a pretty steady transmission fluid leak. I checked and it seemed to be coming out of the tail housing where the yoke enters the transmission. After almost killing myself (literally - its a long story) installing a rear transmission seal, the leak is still there.

It leaks worst when the truck is pointing up hill, Which is why I always back onto my sloped driveway. I've been told that it could be the speedo o rings, but they look OK. It still looks like its dripping from the back end of the tranny.

**swervin ervin** · 11-12-2003, 01:48 AM

Here you go.

http://www.73-87.com/garage/yokeleak.htm

bluec10 · 11-12-2003, 02:11 AM

Thanks for the link. The advice is EXACTLY what I needed. Now I'll just have to get over my truck-rolled-off-the-ramps phobia and get to work.

*Zilverado* · 11-12-2003, 03:36 PM

Quote:

Originally posted by swervin ervin
Here you go.

http://www.73-87.com/garage/yokeleak.htm

Mike to the rescue again.

GREAT STUFF!!!

Hey wasn't the "Lone Ranger's" ride WHITE as well??? hmmmm, curious...

11-12-2003, 12:54 AM	#1
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	Transmission Fluid Leak I asked this question on the 67-72 board, but I thought I'd ask it again here in case someone with a newer truck has some experience with it. My '76 has a TH350. After putting in a new engine, I noticed a pretty steady transmission fluid leak. I checked and it seemed to be coming out of the tail housing where the yoke enters the transmission. After almost killing myself (literally - its a long story) installing a rear transmission seal, the leak is still there. It leaks worst when the truck is pointing up hill, Which is why I always back onto my sloped driveway. I've been told that it could be the speedo o rings, but they look OK. It still looks like its dripping from the back end of the tranny. __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said.

11-12-2003, 01:48 AM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Here you go. http://www.73-87.com/garage/yokeleak.htm __________________ Mike 1985 Chevy C-10

11-12-2003, 02:11 AM	#3
bluec10 Registered User Join Date: Apr 2002 Location: Manitoba, Canada Posts: 663	Thanks for the link. The advice is EXACTLY what I needed. Now I'll just have to get over my truck-rolled-off-the-ramps phobia and get to work. __________________ Present: 2015 Tacoma. Yeah, not a GM, but I love it. 1969 GMC 32,000 - fix, drive, relax, fix... 2019 BMW R1250 GSA - Yahoooooooo 1979 Honda GL 1000 - retro touring at its best. Past: '05 Sierra 4x4 - Had 270,000 KM and running well when it was written-off by a stop sign runner. '94 F-150 from the "F word" company. I'll admit it...good truck. Sold what was left of it for $800 to a guy who came to pick it up at 11:00 PM with cash in hand. Hmm. '79 Sierra Grande (Black) organ donor - perfect rebuildable 4-bolt 350 and a good TH350. '76 Sierra Grande (Orange) - hate isn't too strong a word. Kid who bought it turned it into a hot rod. '68 C-10 R.I.P. - Dad's old truck...too far gone to resurrect. '59 C-50 - with hoist. Truck is gone, wife isn't. Nuff said.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.