Jeep Wrangler Problems

Front and Rear Differential Pinion Seal and Transfer Case Leaks on Jeep Wrangler

Problem Description and Possible Solution

Leaks at the front and/or rear differential pinion seal and from the transfer case are common. Leakage from the transfer case normally occurs at the case-mating surfaces and require removal of the transfer case to reseal.

(76 people reported this problem)

Jeep Wrangler Vehicles With This Problem

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Average mileage: 71,866 (11,290–175,000)
Drive Trains affected: 4WD, Automatic Transmission, Manual Transmission
20 model years affected: 1994, 1995, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013, 2014, 2015
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Viewing 1-20 of 38 comments
im a chrysler technician and own a wrangler myself, this is the bigget problem on the wrangelers up to 2006 the front and rear pinion seals leak. these cars are industructible though nothing can stop the 4.0liter inline 6
Currently have a small leak in my transfer case. I got an estimate and it looks like it will cost around $500 to fix.
Took my Jeep in for it's 30k mile check up and they found the seals leaking. The technicians even researched all kinds of warranty/recall data since they said they would not expect to see this problem so soon
Differential service, front and rear. Gaskets replaced, pinion seals leaking. I had the problem at roughly 70,000 miles and same issue at 100,000 miles
I was inspecting the under side of my jeep the other day and noticed it was leaking. I took it to the dealer and they said it wasn't covered by the warranty. So I'm in the process of having it fixed now!
Leaking rear pinion seal in transfer case was noticed during regearing of differentials. Replaced it.
Had my diff seal replaced on front end 6 months ago, its leaking again.
transfer case is always wet, leaking. haven't fixed it. Now front right wheel inside is dripping something and the car won't move.
Started leaking from the front me and my friends did a diagnostics and we seem to have concluded that it's the transmision leaking
Leak found during an oil change - nothing suspicious happening to cause any notice. Front differential was leaking, and Jeep replaced the pinion seal. Thankfully it was under warranty.
Leaking fluid out of junction of pan and case. Huge puddle underneath middle of vehicle. Taking it to the man tomorrow.