3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

Leaking tranny and front diff pinon seal

Thread Tools
 
Search this Thread
 
Old 02-04-2007, 12:05 AM
  #1  
Registered User
Thread Starter
 
el toro's Avatar
 
Join Date: Feb 2007
Posts: 32
Likes: 0
Received 0 Likes on 0 Posts
Leaking tranny and front diff pinon seal

I just did my first oil change (at least the first one I did myself) and was under the truck looking around. I noticed some oil residue that looked like it had leaked out of the tranny near the torque converter inspection plate. Then I also noticed that the bottom and rear of the front differential looked wet, and had some oil just barely leaking down from the pinon seal. This truck is relatively new (8000 miles) and just a few weeks ago I did give it a pretty good 4x4 workout. The leaks are not bad at all, and there hasn't even been any drips, I just notice a "wetness" in these two locations. Should I be concerned? Or might this be normal as new seals expand and seat? Thanks.
Old 02-04-2007, 12:19 AM
  #2  
Registered User
 
53 willys's Avatar
 
Join Date: Mar 2005
Location: Utah
Posts: 6,259
Likes: 0
Received 1 Like on 1 Post
is the oil between the engine and transmission, trans fluid(red) or engine oil?
the crank case breather tube also vents down onto the front axle so make sure it is not just vent tube oil.
there have been quite a few pinion seals go from what I have seen around here.
the seals on the pinion shaft defiantly do not expand and seat, the seal lip rides on the pinion shaft and keeps the fluid in if it expanded it would leak for sure.

Mark

BTW you need to fill out your Sig
Old 02-05-2007, 11:37 PM
  #3  
Registered User
Thread Starter
 
el toro's Avatar
 
Join Date: Feb 2007
Posts: 32
Likes: 0
Received 0 Likes on 0 Posts
The stuff near the torque conv is def tranny fluid. Looks like it came out of the bottom of the inspection plate.

I'll check the front axle a little better. I know where the crankcase vent is and this sure looks like a pinon seal leak.

Any thing else?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
crazybryan
3rd Gen Engine and Drivetrain -> 2003-2007
3
02-06-2013 06:59 PM
UT Fan
3rd Gen Engine and Drivetrain -> 2003-2007
12
12-17-2009 06:58 AM
SDHNTR
3rd Gen Engine and Drivetrain -> 2003-2007
17
04-02-2009 10:19 AM
KMKDiesel
3rd Gen Engine and Drivetrain -> 2007 and up
9
01-07-2008 05:43 AM
grishfish
3rd Gen Engine and Drivetrain -> 2003-2007
4
06-27-2007 01:24 PM



Quick Reply: Leaking tranny and front diff pinon seal



All times are GMT -5. The time now is 01:29 AM.