To clarify, what AJeepZJ said is you have a QT-I not the QD-I or QD-II
2008 Jeep Commander 3.7L V6 4x4, Rocky Road 2.25" lift, Bilstein Struts, Monroe Sensa-Trac Load Leveler Shocks, Rusty's Adjustable Track Bar, K&N CAI 63, Flowmaster Super 44 Offroad Muffler, Bull bar w/ driving lights.
Maybe the gasket talk is about removing the cover and needing either a gasket or RTV to seal it back up.
So either you have to pump out the old fluid, or remove the cover and seal it back up. No teflon tape because the fill hole is just plugged with a rubber stopper.
I have been using the RTV you can get from your local auto parts store that is made just for gear oil. Never had a leak and have been using it since day 1 with mobil 1 (75w140). I now have 105,500 miles. No friction additive is needed in your Jeep. The only guys who need friction additive are the ones that have QD II and it says QUADRA-DRIVE II just below the gear shifter in the area of the 4 low t-shaped handle. Mostly HEMI Jeeps and a select few with the 4.7 Have QD II
2007 4.7 Liter XK | Front Modified OME HD Lift | Rear 4" Superlift | JBA UCA's | Rusty's Rear Adjustable Track Bar | Rysty’s Adjustable Upper and Lower Rear Control Arms w/Heim Joints | Mickey Thompson Classic III 17x9 Wheels | 315/70R17 Goodyear Duratracs | Airflow Snorkel | Flowmaster 40 Series Muffler | Superchips Flashpaq | Mopar Skids | 4xGuard Belly Guard | American Rebel Rear Diff Cover | Rear Powertrax No-Slip | Front Electronic Locker | Rear Heat/AC Delete
GREEN RTV Gasket maker for differentials.
Follow the directions on the back of the package. A lot of people make 2 common mistakes... they either:
1) wait too long to put the cover back on, thinking they're doing a good thing by letting the RTV start trying first or
2) immediately torque the bolts and squeeze out all of the gasket maker
So for people like me who have not used RTV in the cover... About how long are we waiting to seal it... Eould you recommend applying the RTV and then hand torqueing the bolts, and then torqueing to spec after 10 mins.
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