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1st Gen Transmisson Leaking

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1966G10

Number of posts : 138
Location : Wisconsin
Registration date : 2009-10-14

1st Gen Transmisson Leaking

Post by 1966G10 on Sun Jan 08, 2017 9:33 am

Looking for some advice here.

I have been battling a transmission leak on my 66 sportvan for a while now. I took the trans out and replaced both front and rear main seals thinking that was the problem. I drive it around the yard and what not, I park it and after a day or so there is a good size puddle under the trans.

I can't even see where it is coming from to be honest. Is there any place to look for on these Powerglides?
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1966G10

Number of posts : 138
Location : Wisconsin
Registration date : 2009-10-14

Re: 1st Gen Transmisson Leaking

Post by 1966G10 on Sun Mar 26, 2017 7:48 pm

Anyone else have issues with the 2 speed trans leaking?
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Digz

Number of posts : 3715
Location : United States Six Lakes MI
Registration date : 2008-05-17

Re: 1st Gen Transmisson Leaking

Post by Digz on Sun Mar 26, 2017 8:03 pm

I'd suggest checking the dip stick tube. Pan gasket also. Fluid level rises at shut off.
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savage

Number of posts : 1827
Location : Where Rust Never Sleeps in Ft Wayne IN
Registration date : 2008-05-15

Re: 1st Gen Transmisson Leaking

Post by savage on Mon Mar 27, 2017 5:25 am

I got PG in the 65 (Rat ina Box)with the 454 & the 68 G-20 (Ghost)with the 307 & they both leak if they set for very long. Replaced gasket , filters,& fluid on both pans (few times??)and still leak
Mine seem to be wet on pan(Have also checked them)
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panelmanrd

Number of posts : 763
Location : kcmo
Age : 56
Registration date : 2009-10-04

Re: 1st Gen Transmisson Leaking

Post by panelmanrd on Mon Mar 27, 2017 6:33 am

shifter shaft seal, speedo drive gear are possible leak
areas, dry it all with brake cleaner and let it sit for
a couple of days and see what gets wet. a shift seal leaking
will also look like a pan gasket leak. hope this helps
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kookykrispy

Number of posts : 1434
Location : Tacoma, WA
Age : 43
Registration date : 2009-05-22

Re: 1st Gen Transmisson Leaking

Post by kookykrispy on Mon Mar 27, 2017 7:37 am

After 50 years of service, the pan can become deformed, especially around the bolt holes.

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Re: 1st Gen Transmisson Leaking

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