Drivetrain Fluid Intervals & Capacity's & Types

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bmanice

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Wondering if someone can give me a rundown on this...


what type of oils are best for each (motor, trans, tcase, diff) and how much is needed, and the due date to change it out for new...

thanks

-Brandon
 

jnaut

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I think for motor oil, the 100% synthetics are coming into high favor. I believe there's a thread on this subject somewhere else? Little bit of arguing too, like what is a "true" synthetic vs. a highly refined and additive-laden traditional oil.
 

jeepkj02

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Engine = 5 quarts = 5W30

Transmission:
45RFE (2002 only) = Drop pan = 5 quarts = ATF+4
42RLE (2003-07) = Drop pan = 4 quarts = ATF+4

Transfer Case:
NV231 (Command-Trac) = 3.0 pints = ATF+4
NV242 (Select-Trac) = 3.4 pints = ATF+4

Axles:
Front = 2.5 pints = 75w90 (street) or 75w140 (towing/offroad)
Rear = 4.2 pints = 75w90 (street) or 75w140 (towing/offroad)*
if you have a LSD/Trac-lock you need 4oz of a friction modifier.
 

ShafferNY

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Some of the 2003's had 45RFE's. Mine does. Separate control module on passenger's side inner fender.
 

JeepJeepster

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Everyone says the 42rle takes 4 quarts but mine took 8 quarts with the pan dropped. I left it off overnight so evidently it slowly drained out over night. Which is a good thing b/c that means it only had around 6 quarts left in it. :D
 

jeepkj02

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Everyone says the 42rle takes 4 quarts but mine took 8 quarts with the pan dropped. I left it off overnight so evidently it slowly drained out over night. Which is a good thing b/c that means it only had around 6 quarts left in it. :D

Didn't you also remove the valve body?
 

JeepJeepster

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Tried too but I couldnt get it off so you cant really say it was off. The valve body was bolted up while it sat overnight so thats not it.
 

jeepkj02

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The full oil capacity of the 42RLE is 8.8 quarts. So if you said you drained 8 quarts you trans was had a little under 1 quart when you filled it.
 

jeepkj02

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Spring has sprung. Every DIY'er has started to wrench on his/her Jeep. There has been a lot of questions on "how often to I need to change this", "what type of fluid does my rear axle need", etc...

Yesterday and today I've been working on a page on Wikibooks to answer all these questions. If anyone spots a typo or wants to add something feel free.

http://en.wikibooks.org/wiki/Jeep_Liberty/Fluid_Capacities_&_Intervals

Also here is a list of all the major bolts and there torque specs. I've been adding to it every time I wrench on my Jeep.

http://en.wikibooks.org/wiki/Jeep_Liberty/Torque_Specs_&_Socket_Sizes
 

JeepJeepster

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Thats just purely awesome jeepkj. I went ahead and saved that to my favorites!

Changing the power steering fluid and bleeding the brakes every 12-15k is a bit much if youre not tjkj though. I changed my power steering fluid at 30k but I would say most people never change the brake fluid at all. Mines been replaced with Valvoline SYN brake fluid but Ill probably do that again at 60k.
 

jeepkj02

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Thats just purely awesome jeepkj. I went ahead and saved that to my favorites!

Changing the power steering fluid and bleeding the brakes every 12-15k is a bit much if youre not tjkj though. I changed my power steering fluid at 30k but I would say most people never change the brake fluid at all. Mines been replaced with Valvoline SYN brake fluid but Ill probably do that again at 60k.

Thanks. :) As for the bleeding the brakes, It is recommended to do it once a year. So I figured 12,000 is a good number. I agree it is a bit much, maybe 25K is a better figure?
 

Dave

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Thanks. :) As for the bleeding the brakes, It is recommended to do it once a year. So I figured 12,000 is a good number. I agree it is a bit much, maybe 25K is a better figure?

You are way better than I am.

I always did a bleed/flush when my front pads needed replacement. So if you drive in traffic/use the brakes a lot and needed replacement at 25,000 as apposed to driving highway and not using them as much and they lasted 50,000. I am not saying this is right, but it's what I do for my own vehicle. Time makes a difference too though. Brake fluid can get contaminated through normal use over time and trash your master cylinder, etc.

Same thing with power steering fluid. Real easy to change that and save your $$$$$ power steering pump.

Just my opinion here, but I could be wrong.

Dave
 

bmanice

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just threw 5qts of 5w30 Castrol Syntec and a Purolator PureOne in my 3.7, seems to be running alot better, looks like my mileage improved as well. Could be because i changed my plugs and air filter as well tho, maybe its a combo of them all.


One more question, i have no idea if the trans fluid has ever been changed and im rounding 100K on my drivetrain. Do you think it would be smart to change my trans fluid still? or should i just let it be, and hope for the best? also the same goes for the differentials...
 

JeepJeepster

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Its always a good idea to drop the pan and change the filter in the ******. Just make sure you use ATF+4 and dont get it flushed. Some people swear by flushes but Ive never had one and Ive never had a ****** fail. Got a Jeep with 165k on it with a ****** thats known to suck, its done fine for us.

You probably noticed the difference by putting new plugs in and a new air filter, not changing the oil. :)
 

bmanice

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awesome bud, thanks for the reply...


ill be sure to do that this weekend, also my moms 98 WJ could use the same...

any idea what fluid that uses?
 

jeepkj02

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awesome bud, thanks for the reply...


ill be sure to do that this weekend, also my moms 98 WJ could use the same...

any idea what fluid that uses?

No such thing as a 98 WJ. If its a 98, then its a ZJ.

ZJ: 93-98
WJ: 99-04

10W30 for the I6
 
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