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View Full Version : 4r70w Massive trans fluid leak...Need to trouble shoot



ram360
08-02-2008, 07:38 PM
So I'm driving and decide to get on it a little from a 30mph roll....car was WOT for a few seconds and I let off. Car is 94 gt w/ 4rw70 trans (shift kit, atco clutches, 3200 stall) . car shifted fine, no noises, anything unusual. Trans was totally build less than 12k agao. I look in my rearview and see this huge clowd of white smoke pouring from my car. I imm. pull over and find trans fluid pouring onto my exhaust. Basically emptied 4qts or more the trans in a matter of 1000ft. the fluid stream was def towards the pass side of the car (which is where the lines are) and once it parked I had a huge puddle directly under the bellhousing. I can't really determine what's leaking even after being under the car. Fluid was nice and red, no burnt smell, etc...

Fast foreward to today, I filled the trans and restarted the car. The car totally pours trans fluid from the bellhousing as soon as I start the car. So apparently it's not a line. Is there a blown out seal of some sort in there or what? Is this a common problem? Should I take it to a shop or something I can do myself? thanks

Stuart
08-03-2008, 09:45 AM
The front seal probably popped out.

Replacing it is not a big problem.

Determining why it popped out may take some doing.

Defective seal, poor return, worn pump area, bushing pulled forward?

That's what you have to discover.

ram360
08-03-2008, 09:58 AM
The front seal probably popped out.

Replacing it is not a big problem.

Determining why it popped out may take some doing.

Defective seal, poor return, worn pump area, bushing pulled forward?

That's what you have to discover.

thanks for the reply. Any idea of what something like this will cost to fix (just ballpark) I mean I'm very proficient w/ car repair but never really feel comfortable w/ auto trans. I have a good shop that can do the work (i'd rather do it myself) but given my limited experience w/ auto's not really sure if I'd be able to determine the exact cause. I'm trying to debate attempt it myself or have it taken to a shop. :( Either way I don't want to go thru this again. Trans has 12K since a complete rebuild just hoping it's a defective seal....

Stuart
08-03-2008, 12:30 PM
Only one way to find out.

Yank the mofo and have a look see.

:-D

ram360
08-03-2008, 02:56 PM
Only one way to find out.

Yank the mofo and have a look see.

:-D

yea, that's never any fun...:-(