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Old 11-12-2003, 12:54 AM   #1
bluec10
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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.
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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.
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