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-   -   T-350 leak (http://www.hotrodders.com/forum/t-350-leak-217914.html)

cullencombs 04-07-2012 05:23 PM

T-350 leak
 
For the life of me I cannot find the leak on this transmission. it will drip off of the pan at the front passenger corner after sitting a while and continue to drip even after not being driven for weeks! I have installed a new oring on the dipstick and checked the kickdown cable, so Im guessing pulling the pan is next?
this transmission only has 200 miles since a rebuild. :confused:

richard stewart 3rd 04-07-2012 06:44 PM

Hi
Are you sure it's transmission fluid & not engine oil?
Are the pan bolts tight?
After you turn the engine off the trans pan fills with the fluid that was circulating while running, so it could be seeping past the gasket.
Rich

cullencombs 04-07-2012 07:14 PM

Quote:

Originally Posted by richard stewart 3rd
Hi
Are you sure it's transmission fluid & not engine oil?
Are the pan bolts tight?
After you turn the engine off the trans pan fills with the fluid that was circulating while running, so it could be seeping past the gasket.
Rich

No its definitely transmission fluid. Im gonna change the pan gasket tomorrow.

SSedan64 04-07-2012 07:34 PM

Clean it off good with Brake Clean, spray some Baby/Talc Powder on the Trans so you can trace the leak before changing parts.

454 Rattler 04-07-2012 07:38 PM

If changing the pan gasket works let us know. Lots of Turbo 350's seem to leak after sitting for a while.

In fact I have a 200r4 in my 36 and it leaks if I don't drive it.

I've changed all the gaskets and o-rings without success.

Good Luck.


454 RATTLER

scholman 04-07-2012 07:41 PM

cullencombs;

I would replace the seal on the shifting shaft on the drivers side.

Scholman

yzair 04-07-2012 10:47 PM

I chased a leak on mine for 6 months check your speedo cable it will drip down catch the trans pan and stop at the shifter seal when it is parked. there are 2 different speedo bullets which is what the speedo cable is attached to, by a retaining clip for the th350 I changed mine to the bullet style and the leak stopped. I replaced the pan gasket and the shift shaft seal twice. but in my case it was the speedo bullet. When it was parked the trans fluid would run forward and when I would drive it the wind would blow it back which made me think it was trans pan gasket or shift seal

T-bucket23 04-08-2012 09:16 AM

I chase a leak that ended up as a pin hole in the pan. You could not see it but it would just weep. I finally went under and cleaned it and then watched to see where the drip was and it formed on the middle if the side part of the pan

beertracker 04-08-2012 09:27 AM

[QUOTE=yzair]I chased a leak on mine for 6 months check your speedo cable it will drip down catch the trans pan and stop at the shifter seal when it is parked.

X2. I had the same problem. It was a leaky speedometer cable bullet seal. What gave it away was trans fluid inside the speedometer cable at trans end.

BT :)

anglia427 04-08-2012 06:23 PM

350 leak
 
if everything above checks out ok it could be you 1/2 acculiminator cover o ring its only charged in 2nd gear and is also on the passenger side of your trans case if you could jack up car and run it in 2nd gear it will leak

jamesl002 04-09-2012 06:37 AM

it could be seeping past the gasket.http://www.infoocean.info/avatar4.jpg


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