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Old 10-12-2010, 03:40 PM
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2001 Wrangler SE fluid change

like stated in the title i have an 01 wrangler SE. i bought it a couple months ago and i have decided to change the differential fluid since i have no clue when it was done last. it has 117xxx miles and i never did this before and have a few questions.

1. i did some research and came to the conclusion that my SE has a dana 35 rear and a dana 30 in the front. is this right? and if so should i do anything special to either of them like additives or something. (do not know if they are limited slip or not)

2. should i change the transmission fluid too? and how bout the t-case. never did those either so if i should can u give me some pointers that would be appreciated.

3. and when i idle there is this little squeaky rattle coming from underneath the driver side door i think. every time i look under there i go wtf cause theres so much going on haha. (im new to jeeps obviously)

thanks for the help sorry if they are beginner questions but like i said im new and i dont wana screw anything up. thanks again.

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Old 10-12-2010, 04:44 PM   #2
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1. Yes you are right 30/35. Unless the previous owner installed a limited slip or locker nothing but gear oil has to be added. this should help
Jeep Axle Differential Fluid Change Service

2.it's up to you if you want to change the tranny fluid but you might as well, if it's a manual it's easy. Drain it and refill it until fluid starts to ooze out of the fill hole. T-case is also easy, drain it and refill it with a good quality atf +4 again until it begins to ooze out of the fill hole, make sure you do all of this on level ground. this should help depending on your tranny and t-case but it will give you an idea.
Jeep NV3550 Transmission & NP231 Transfer Case Service

3. as for the idle could be many things but I will give you a starting point. Can you feel it under your feet on the drivers side floor? if so it is most likley the shift linkage. A very well known problem, I fixed mine at 40k so if you made it 112k your doing well. It was also a chrysler TSB. part's are $20 and it's a very simple fix. Another link to show you exactly what to do.
Jeep TJ Transfer Case Shifter Knocking TSB

All generic info, if you need specifics provide your tranny type, t-case and engine etc... but that should get you started.
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