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post #1 of 7 Old 10-27-2005, 05:34 AM Thread Starter
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We have a 2003 Jeep Liberty Sport 4X4. Have only used the 4 wheel drive twice since new for short distance. Is it necessary to change the transfercase oil & differential oil every 12,000 miles as indicated in owners manual? The dealership wants $300.00 to change. The jeep is currently in shop due to rear main seal leak with just 29000 miles. Only have 5 more months of warranty. Thanks,

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post #2 of 7 Old 10-27-2005, 07:10 AM
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Yes, cheap insurance. Even though you don't use 4wd much, there are still many important parts spinning around in there that will cost you way more than $300 to replace. Also check around because at my local dealer it costs $99+fluid for the 4x4 service.

Or if you're feeling adventurous do it yourself it really isn't that hard, just smells bad.

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post #3 of 7 Old 10-27-2005, 08:38 AM
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For the tcase i would say 30k, and the front axle. The rear axle would be ok to change it at 12k. The rear axle has torque on it all the time, the front axle does not. $300 is not that bad for the front rear and tcase. But i could never bring myself to pay that, i do all that myself. I got 5gallons of 75-140syn for $68 and maybe $10 for tyhe tcase.
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post #4 of 7 Old 10-27-2005, 09:29 AM
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$300!!! Wow, here in Orange County CA, both axles $140. With coupon $80.
I still changed them myself.

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post #5 of 7 Old 10-28-2005, 09:21 PM Thread Starter
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Thank You for your advise. We have never had a 4X4 before so this is all new to us. Thanks again...JR
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post #6 of 7 Old 10-29-2005, 03:27 AM
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If you have an hour or two, a few sockets, some gear oil, some RTV (red or black) and a siphon for the gear oil, you can do it yourself. Total cost for everything except the hand tools shouldn't really exceed 30 bux, and that's saying you go overboard and buy synthetic fluid and an electric pump for the gear oil.

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post #7 of 7 Old 10-29-2005, 05:34 AM
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I am doing all 3 services (F and R Diff, and TC) at 30,000 miles (that's 2k away)
QUESTION------- is the stock Diff fluid synthetic already?

Will probably do an AAMCO (or whoever does it) transmission power purge as well. Some say it can wait till 36k or even 45k miles, but I say the stock tranny fluid has taken a beating and needs all new fluid. From there I will let it run for 45 or 50k miles, with probably 1 quick 5 quart drain and refill in-between.

One thing I am suprised is that the dealer wants me to replace my spark plugs at 30k miles. I would hope they at least keep working till 36k miles. Anyone else think that 30k is a little early for spark plugs?

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