Join Date: Nov 2016
Location: Toronto, Canada
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Back inside the house, showered and cooling off. All 3 drivetrain fluids are done. I feel better just knowing fresh fluid is circulating throughout all the major components.
Couple of things I noticed while doing these jobs:
The trans drain plug and transfer case fill plug uses an 8mm allen head key, use one that is part of a 3/8" drive socket so you can use your ratchet to loosen and tighten it to specs. MAKE SURE you are square on those plugs before you try to loosen it cause if you are not you will round off the female allen head side of the plug and YOU ARE SCREWED. You will need a clear tube about 4 ft. long 7/16" diameter to be able to fill the transfer case and diff, run the tube up through the engine compartment for the transfer case and from the diff out near the RR wheel area. Keep a downward angle on the tube so the gear oil you put in will drain into those components when refilling. 2 people doing this part will be better (I was underneath holding the tube in while the GF pour the oil above, she needed to put in the sweat equity too).
The transfer case drain plug and diff plugs use a 15/16" socket, you probably have to use a 1/2" drive ratchet for that size plug to loosen and tighten it. The diff fill plug does fit a tad loose with the socket than the other ones (I tried a 22 and 24mm socket and they either didn't fit or was too loose, I think it's a 23mm socket which is an odd size but 15/16" socket will work). The diff and transfer case drain plugs are also magnetic and there were quite a bit of filings on them when removed, if you purchased your car new I would recommend doing it after about a year and a bit of driving then afterwards you can drain and refill those after about 4 years. The trans I'm going to do again in about 1.5-2 years since you can't drain out all the fluids. This will keep the fluids constantly fresh without running them for too long.
Always replace the washers when you do this service (part of the manual servicing) and tighten the plugs to the proper specs.
Dab a bit of anti-seize on the transfer case plugs and diff plugs before reinstall, this ensures you can remove them down the road when your car is exposed to numerous winters in salty areas, do the same for the bolts on the splash shield you need to remove to be able to change out the trans fluid and transfer case fluids.
The trans calls for 3.3L to refill after draining, I put in 3L then after everything was all done the GF went for a drive to make sure all the fluids were good. I then rechecked the trans level when she came back and it was right on the mark. I will recheck it after a few days and if need be I will top it up. You will need a funnel with a long down spout to be able to fill the trans via the dipstick tube.
Not too bad to do, having the QJ made it easy to get the car up and lots of room under there when in the air, happy that I made the purchase (still have to get it to work with lifting up my Shelby).
Last edited by Cman; 07-01-2018 at 08:22 PM.