So not too proud of this, but my 2005 Wrangler X is at 61,000 and has never had the fluids of the differentials (front and rear), transmission (6 speed man), or transfer case changed.
Am I going to find some serious gunk down there when I change it out this week? Is it worth swapping the fluids, driving around a bit, and then swapping them out again (within a week or so) in order to get out as much stuff as possible? Is some sort of flush needed?
Haven't had any issues since I got it new. Regular oil changes at least. Just finished a 2 inch Skyjacker lift and got new 31s and figured the extra strain on the vehicle warranted some maintenance attention.
I don't think you'll find any gunk. If the 60k miles were normal driving I bet the fluids won't be bad at all. Changing the transfer case fluid is easy but you'll need a way to get the fluid in...either a pump or those tubes that screw onto oil quart as there's not much room under there. Same goes for the diff fluid. I always let the tranny place do the tranny flush for $99 and never had a problem...most guys on here prefer to do it themselves.
Thanks for all the info guys. Definitely a relief to here all that!! I still plan on doing the maintenance, if anything just for the experience. I'll post some pics of the mess!!! Had to special order the 14mm and 17mm Allen sockets for the trans. Any reasons I should also order new plugs for everything (drain/fill for diff, t-case, trans)?
Also, those sockets are 1/2" but my torque wrench is 3/8". Would using an adapter screw up the required 30 ft-lbs torque on the plugs?
I'd venture a guess that less than 1% of the cars & Jeeps on the road ever had the gear lube in their axles changed. So far as the transfer case and transmission go, it's only time for them to be changed now so no sweat that you haven't changed them yet... and yes of course change the axle lubes too.
My father always used to tell me "diff fluid is a lifetime fluid." Ran my 99 Dakota to 160k miles and never touched the transmission, 8.25 diff or coolant. Plenty of burnouts, hauling, towing, hard driving, etc. Never a problem. No need to worry.
Jeep on the other hand gets treated to regular fluid changes even if it can't haul, tow, drive hard, or dream of doing a burnout.
'99 SE: The "It could be worse..." jeep
Was able to get under the TJ today and replace the trans and t-case fluids. Royal Purple Synchromax for the 6 speed and NAPA ATF+4 for the t-case. I plan on using NAPA 80W-85W-90 for the differentials later this week.
I had no problems with the plugs on either thanks to some PB Blaster a day or two before. Lets just say that my "homemade" funnel for the transfer case drain hole didn't work out so well. Probably half a quart on the pavement. Probably why the Property Manager of the apartment complex came by to let me know that people can't work on the cars in the parking lot. Oh well.
Originally Posted by TroubleNEO
Iíll also bet money that your ATF in the TCase will look like brand new fresh fluid.
The oil in both did not look bad at all, but I was a bit concerned with the amount of metal shavings on the magnet of the trans drain plug.
Any problem there, or is that expected after 7+ years of use and ground gears from 3 people learning stick shift.
Much better after cleaning it out. There really was a lot in there.