rear pinion leak - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 15 (permalink) Old 11-20-2011, 12:29 PM Thread Starter
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rear pinion leak

So I just installed a thrush on my 06...while under there I decided to give it its usual look over for upcomming issues since its last oil change...damnit if I didn't find one...must have started 3k ago but I noticed some drips comming from the rear pinion seal...enough that I have the fling drip line on everything underneath. I havnt had to pull a diff in years, so im a bit rusty on what ill run into, obviously drive shaft needs dropped(ill end up doing u-joints too) but im wondering if I can get this done without having to pull axels out...

'06 XK 245/70R17 Nitto Terra Grappler, Thrush 30" glasspack, My Custom LED taillights, Euro fog/bumper light mod, LED accent lights...working on more to come :-)
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post #2 of 15 (permalink) Old 11-20-2011, 07:10 PM
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You don't need to take the axle off, but you will need room to move under , specially using the torque wrench, took me a few hours last year taking my time,
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post #3 of 15 (permalink) Old 11-20-2011, 08:30 PM
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Just an FYI. You cant change the u-joints on the rear drive shaft. You have to replace the entire drive shaft once they go bad! As for the pinion seal swap, it isnt all that bad. Did mine a while back and only took about a half hour or so provided you have the right tools.




2007 4.7 Liter XK | Front OME MD Springs w/Superlift Preload Spacer | Rear 4" Superlift Springs | Bilstein 5125 Rear Shocks | JBA UCA's | Rusty's Rear Adjustable Track Bar | Black Rock 997 Wheels | Fred Goeske 1/4 Inch Wheel Spacers | 305/70R17 Goodyear Wrangler MT/R w/Kevlar | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front E-Locker | Rear Heat/AC Delete
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post #4 of 15 (permalink) Old 11-20-2011, 11:19 PM
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mines leaking too is it hard to do what tools

2006 jeep commander many mods.
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post #5 of 15 (permalink) Old 11-21-2011, 07:16 AM
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If you have never done one before I wouldnt recommend doing it. There are two ways to do it. The way the service manual states and the way i did it. They way i did it apearently you are taking chances that its not done properly. I have put thousands of miles on the XK since the pinion seal install without any issues. adamag25 posted a how to right out of the service manual. I think he put it in his garage thread.




2007 4.7 Liter XK | Front OME MD Springs w/Superlift Preload Spacer | Rear 4" Superlift Springs | Bilstein 5125 Rear Shocks | JBA UCA's | Rusty's Rear Adjustable Track Bar | Black Rock 997 Wheels | Fred Goeske 1/4 Inch Wheel Spacers | 305/70R17 Goodyear Wrangler MT/R w/Kevlar | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front E-Locker | Rear Heat/AC Delete

Last edited by 07JeepXK; 11-21-2011 at 07:19 AM.
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post #6 of 15 (permalink) Old 11-21-2011, 11:39 AM
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Pinion_Seal1.pdf

Pinion_Seal2.pdf

.

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post #7 of 15 (permalink) Old 11-21-2011, 03:37 PM
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thanks guys im tackling it tomorrow

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post #8 of 15 (permalink) Old 11-21-2011, 04:14 PM Thread Starter
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oh god that will be easy, ill back it onto my ramps...I didnt realize the u-joints were on a flange lol. all i need a bar torque wrench to get a reading on it...

'06 XK 245/70R17 Nitto Terra Grappler, Thrush 30" glasspack, My Custom LED taillights, Euro fog/bumper light mod, LED accent lights...working on more to come :-)
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post #9 of 15 (permalink) Old 11-22-2011, 08:19 AM
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Thats how i did mine differently. I didnt use a torque wrench to measure the rotational resistance or anything like that. Used and inpact to take off pinion nut, pulled old seal, reinstalled new seal, reinstalled pinion nut with impact and reinstalled drive shaft. No problems here and I replaced it thousands of miles ago with plenty of off roading in between!




2007 4.7 Liter XK | Front OME MD Springs w/Superlift Preload Spacer | Rear 4" Superlift Springs | Bilstein 5125 Rear Shocks | JBA UCA's | Rusty's Rear Adjustable Track Bar | Black Rock 997 Wheels | Fred Goeske 1/4 Inch Wheel Spacers | 305/70R17 Goodyear Wrangler MT/R w/Kevlar | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front E-Locker | Rear Heat/AC Delete
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post #10 of 15 (permalink) Old 11-22-2011, 08:54 AM
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Quote:
Originally Posted by 07JeepXK View Post
Thats how i did mine differently. I didnt use a torque wrench to measure the rotational resistance or anything like that. Used and inpact to take off pinion nut, pulled old seal, reinstalled new seal, reinstalled pinion nut with impact and reinstalled drive shaft. No problems here and I replaced it thousands of miles ago with plenty of off roading in between!
Didn't you also have someone very experienced helping you? People who have experience building diffs are usually able to check the rotational force by hand and know if its too loose or too tight.

But yeah, I would never do a pinion seal like that. YOU got lucky and didn't over tighten it. If you happened to have over tightened it with the impact you'd have to spend a lot more replacing those pinion bearings by now. Not worth the risk IMO. A beam style torque wrench is cheap and it doesn't add a lot of time.... its not like you saved hours, maybe 10-15 minutes?

-Matt
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