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Unread 02-03-2013, 05:31 PM   #1
dirtdad
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1996 ZJ 
 
Join Date: Nov 2007
Location: california
Posts: 333
trans leak

'96 ZJ with 318 and NP249 transfer case. When parked uphill on my very steep driveway, it would leak out between the transfer care and the trans. I removed the transfer case and replaced both the tailshaft seal on the trans, and the input shaft seal on the transfer case. All seemed fine for a couple of weeks. It has been parked on the driveway, facing uphill, and about 4 days ago, I noticed it is leaking again, good size puddle. I got to thinking about things, and I am wondering. In the past, I have had issues with the torque converter draining down, and the trans taking a little while from a cold start, before it would engage, have not gotten around to it, but think I want to replace the leak down check valve on the cooler hose, to prevent this. Is it possible that when the torque converter leaks down, the trans fluid level in the trans increase to the point it is above the seal of the tailshaft, and just plain seeps around the tailshaft? It doesnt seem right that the fluid level when parked, even if uphill, would be high enough to be at the seal heigth. Or did I just plain screwed up putting the seal in, and need to do it again? The only time I have actually noticed leaking, is when parked uphill in my driveway.

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1996 ZJ 5.2
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Unread 02-03-2013, 10:41 PM   #2
jtackerman28
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1997 ZJ 
 
Join Date: Nov 2011
Location: Flint, Michigan
Posts: 2,131
I don't know if that is possible or not, but I have no check valve at all and don't have a problem parking on my rather steep driveway. Try leaving it parked over night and comparing the level in the trans from sitting warm to see how much it is coming up
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