Small slow leak from rear diff cover - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 5 (permalink) Old 05-18-2013, 10:01 PM Thread Starter
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Small slow leak from rear diff cover

Hey everyone,

Noticed a few oil spots in the garage under the rear diff case. I took a look and it looks like it is definitely coming from the cover and not from the front. I assume that it is sealed up with RTV not a gasket, right? Not sure if the last change was just poorly done or if this is a sign of something that I need to look into further. What do you think?

Thanks.
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post #2 of 5 (permalink) Old 05-19-2013, 09:27 AM
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The rear is sealed with RTV. Just keep an eye on the fluid level so it doesn't get low. I would try to pull the cover in the next few weeks and do a fluid swap with new RTV




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 #3 of 5 (permalink) Old 05-19-2013, 09:40 AM Thread Starter
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Plan on doing that this evening. Any recommendations on brand and weight oil?
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post #4 of 5 (permalink) Old 05-19-2013, 09:53 PM
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Mobil 1 synthetic 75w140 gear oil. If you have Quadra Drive II with the ELSD reat diffetential you will need a bottle of friction additive. If your not sure which axle you have count the rear diff cover bolts. If you have 10 then no modifier needed. If you have a 12 bolt then you need it




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 #5 of 5 (permalink) Old 05-20-2013, 08:37 AM Thread Starter
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Quote:
Originally Posted by 07JeepXK View Post
Mobil 1 synthetic 75w140 gear oil. If you have Quadra Drive II with the ELSD reat diffetential you will need a bottle of friction additive. If your not sure which axle you have count the rear diff cover bolts. If you have 10 then no modifier needed. If you have a 12 bolt then you need it
The shop near me that I went to yesterday did not have 4 quarts of M1 so I got this, Valvoline Full synthetic. I also got some K&W Posi-Trac gear oil additive (7 oz). Is that the right FM? I ready in another post that I am supposed to use 4 oz with the 4 quarts in the rear diff. Sound right?
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