Today I changed the gear lube on my '06 WK 5.7L Hemi with QDII.
This WK is not lifted, stock suspension, but easy to reach everything.
I used Amsoil Severe Gear 75W-140 lube and their Slip Lock additive for the limited slip diff's.
Also used a fluid pump from Lowe's. Not endorsing any products here, but thought you'de like to know.
The photo's are pretty much self explanatory;
Removed the rubber plug from the rear diff.
Used the drill/pump to remove the old gear lube, it was black.
Bought the WK with over 60K miles and it doesn't look like this has ever been changed before?
The pump made this painless and quick!
Added the "Slip Lock" first.
Pumped in the "Severe Gear" Lube, big difference in color from the old lube.
Took 2 whole quarts, so I think I got most of the old stuff.
Replaced the rubber plug, took about 10 min. tops.
Front diff was more challenging;
Removed the skid plate with 13mm socket, removed rear bolts, and loosened front bolts. The front slid out of the way easily.
Removed top fill plug, but a socket wrench wouldn't fit with the 14mm hex socket I had. So I used a 15mm craftsman wratcheting wrench on the 14mm hex to get it loose, necessity is the mother of invention.
Removed the lower drain plug with a socket and 14mm hex socket.
Diff drained easily into oil bucket.
Replaced drain plug using teflon tape, FSM says torque to 15-25 ft./lbs.
I used a torque wrench at 20 ft./lbs. here.
Added "Slip Lock" here too.
Used pump to fill the upper hole, routed hose over crossmember.
Once it was full, took less than 2 quarts, I replaced the plug.
Just used the wrench trick again, but couldn't measure torque,
good and tight.
Everything was easy to reach from my back on the driveway.
Took about an hour.
We'll see how the Amsoil performs, but I expect no problems.
Maybe even get more mpg's too!