Mopar Friction Modifier: use another brand! -
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Unread 08-21-2011, 08:24 PM   #1
Registered User
2008 WK 
Join Date: Apr 2008
Location: Philadelphia/Marlton, NJ
Posts: 126
Mopar Friction Modifier: use another brand!

I have a '08 WK w/QDII. I bought Lucas 10122 75/140 Synthetic Gear Oil and went to the local dealership yesterday to pick up the Mopar friction modifier. Figured I could get this done quickly today (Sunday).

Some interesting things I've learned:

1. Dealer charges $10 per bottle!
2. Service/Parts manager didn't know who manufactures the friction modifier, but said Mopar used to have a relationship with Mobile1 and that has recently changed.
3. Service/Parts manager said I can use any other brand friction modifier as long as the manufacturer states that it meets Chrysler 4318060 standards.
4. Here's the biggest lesson I've learned today: the front axle's fill plug is on the PASSENGER's side. The drain plug is on the DRIVER's side. I thought that fill plug looked low! Dumped the entire amount of fluid onto my garage floor (luckily it's epoxied for easy cleanup).
5. Take the front skip plate off - it's easier to get to the drain/fill plugs. BTW, take the rear two bolts out completely, just loosen the front two. The skid plate will slide a bit and then it drops down (leaving the 2 front bolds and washers still in place.)
6. The fill plug still doesn't have a lot of access room: I had to put the hex bit onto an open-end wrench instead of using a ratchet.
7. A simple fluid transfer pump from Harbor Freight did the job, easily.
8. Gear oil stinks, really bad. Awful smell.

Overall, a fairly simple job. Changing axle fluid and spark plugs is an easy way to save money every 30k miles. Local dealer wanted $229 to change the axle/diff fluid and $339 to change the plugs. My cost was < $100. Not bad.

2008 Jeep Grand Cherokee Limited, Hemi QDII, RER, Tow Package, 18" Chrome clad.
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