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07-03-2024, 06:07 PM
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#1 |
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Registered User
Join Date: Apr 2017
Location: TX
Posts: 257
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never ending leak - transmission
Where the transmission meets the driveshaft I have a leak that will not be fixed. Had the seal replaced twice. No luck.
And it doesn't leak constantly. It will be fine for a while, then I will come out one day and there will be a 16oz puddle under it. I do not drive it often which makes it weirder.
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1979 Chevrolet Bonanza/305/4L60/Edelbrock Performer/Holley 600 Classic |
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07-03-2024, 06:24 PM
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#2 |
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Senior Member
 
Join Date: Dec 2009
Location: TN.
Posts: 8,303
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Re: never ending leak - transmission
The driveshaft yoke and rear bushing are probably worn cause your leak.
Is this a 4L60 transmission in your signature?
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________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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07-03-2024, 07:09 PM
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#3 | |
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Registered User
Join Date: Apr 2017
Location: TX
Posts: 257
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Re: never ending leak - transmission
Quote:
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1979 Chevrolet Bonanza/305/4L60/Edelbrock Performer/Holley 600 Classic |
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07-03-2024, 10:35 PM
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#4 |
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Registered User
Join Date: Sep 2014
Location: Central MN
Posts: 288
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Re: never ending leak - transmission
Certainly sounds like a tail shaft bushing. Also check that the u-joints are in good shape.
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-400/400 1979 K25 350/SM465/205/44HD/14FF 1985 K20 400/400/208/10/14 1987 V10 TBI350/700R4/208/10/10 '85 Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=643968 |
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07-04-2024, 05:57 AM
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#5 |
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Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,583
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Re: never ending leak - transmission
Not sure about the 4L60 but my TH350 had a similar problem. After replacing the tail shaft seal did nothing to fix the leak, further investigation revealed that there is an inner rear seal that also needs replacing. After having that replaced, no more leak.
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07-06-2024, 10:18 AM
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#6 |
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Registered User
Join Date: Jul 2011
Location: SW Ontario
Posts: 1,208
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Re: never ending leak - transmission
Had the tailshaft off the trans? Theres a cup and oring to help keep oil from getting out the tailshaft yoke vent hole. Mine is plugged with rtv to stop the drip.
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07-06-2024, 05:32 PM
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#7 |
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Registered User
Join Date: Apr 2017
Location: TX
Posts: 257
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Re: never ending leak - transmission
Thank you for all the replies!
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1979 Chevrolet Bonanza/305/4L60/Edelbrock Performer/Holley 600 Classic |
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