Jeep gearbox/axle fluid spec?
Discussion
Yes, use ATF4 in the auto gearbox. I suggest changing the filters while you're at it.
The transfer box oil, if bought from a dealer, is Arbor MTF. Changed to this from the Mopar branded one when the Fiat-Chrysler marriage happened. You do not need to put an additive into it. Normally comes in a 5L container, unfortunately, which is about triple what you actually need, so if you know someone else who runs the same transfer case, split the cost with them.
For the diffs, yes, if you have the vari-lok gerotor differentials that came with QuadraDRIVE system, not Quadratrac II, use the Mopar gear oil (which contains no friction modifiers), and add in the Mopar friction modifier to that. You get slightly different mix ratios depending where you check your information, but 7% friction modifier is about right.
If you have the open-diff Quadratrac II, yeah, just good quality oil of the weight mentioned above.
Oh, and thanks to some intelligent design choices, only the transfer case has a drain plug. The gearbox and axles need removal of the sump/diff covers respectively to drain them, which is a faff. Don't foget to get yourself some gasket goo for refitting them.
http://www.wjjeeps.com is a really good reference for these Grand Cherokees.
The transfer box oil, if bought from a dealer, is Arbor MTF. Changed to this from the Mopar branded one when the Fiat-Chrysler marriage happened. You do not need to put an additive into it. Normally comes in a 5L container, unfortunately, which is about triple what you actually need, so if you know someone else who runs the same transfer case, split the cost with them.
For the diffs, yes, if you have the vari-lok gerotor differentials that came with QuadraDRIVE system, not Quadratrac II, use the Mopar gear oil (which contains no friction modifiers), and add in the Mopar friction modifier to that. You get slightly different mix ratios depending where you check your information, but 7% friction modifier is about right.
If you have the open-diff Quadratrac II, yeah, just good quality oil of the weight mentioned above.
Oh, and thanks to some intelligent design choices, only the transfer case has a drain plug. The gearbox and axles need removal of the sump/diff covers respectively to drain them, which is a faff. Don't foget to get yourself some gasket goo for refitting them.
http://www.wjjeeps.com is a really good reference for these Grand Cherokees.
InitialDave said:
Yes, use ATF4 in the auto gearbox. I suggest changing the filters while you're at it.
The transfer box oil, if bought from a dealer, is Arbor MTF. Changed to this from the Mopar branded one when the Fiat-Chrysler marriage happened. You do not need to put an additive into it. Normally comes in a 5L container, unfortunately, which is about triple what you actually need, so if you know someone else who runs the same transfer case, split the cost with them.
For the diffs, yes, if you have the vari-lok gerotor differentials that came with QuadraDRIVE system, not Quadratrac II, use the Mopar gear oil (which contains no friction modifiers), and add in the Mopar friction modifier to that. You get slightly different mix ratios depending where you check your information, but 7% friction modifier is about right.
If you have the open-diff Quadratrac II, yeah, just good quality oil of the weight mentioned above.
Oh, and thanks to some intelligent design choices, only the transfer case has a drain plug. The gearbox and axles need removal of the sump/diff covers respectively to drain them, which is a faff. Don't foget to get yourself some gasket goo for refitting them.
http://www.wjjeeps.com is a really good reference for these Grand Cherokees.
If you have the Quadradrive you use the normal diff oil SAE 75W-140 Synthetic front and Thermally stable SAE 80W-90 gear lube (or the 75w-140 for heavy use) rear and add friction modifier. 4oz per diff .The transfer box oil, if bought from a dealer, is Arbor MTF. Changed to this from the Mopar branded one when the Fiat-Chrysler marriage happened. You do not need to put an additive into it. Normally comes in a 5L container, unfortunately, which is about triple what you actually need, so if you know someone else who runs the same transfer case, split the cost with them.
For the diffs, yes, if you have the vari-lok gerotor differentials that came with QuadraDRIVE system, not Quadratrac II, use the Mopar gear oil (which contains no friction modifiers), and add in the Mopar friction modifier to that. You get slightly different mix ratios depending where you check your information, but 7% friction modifier is about right.
If you have the open-diff Quadratrac II, yeah, just good quality oil of the weight mentioned above.
Oh, and thanks to some intelligent design choices, only the transfer case has a drain plug. The gearbox and axles need removal of the sump/diff covers respectively to drain them, which is a faff. Don't foget to get yourself some gasket goo for refitting them.
http://www.wjjeeps.com is a really good reference for these Grand Cherokees.
If you have the Quadradrive you use the normal diff oil SAE 75W-140 Synthetic front and Thermally stable SAE 80W-90 gear lube (or the 75w-140 for heavy use) rear and add friction modifier. 4oz per diff .
Here's the confusion, sometimes...
I have Quadradive, and rather than buy 2 differnet oils, I just put the expensive fully synth front and back. The manufacturer (I forget which) says it's for LSD's but dont say there's any additive.That left me confused a bit......
So reading some of the USA forums, owners were using this fully synth oil and adding half the Mopar recomended additive, and driving them on full lock to see if there was any judder. Easy to add a bit more if needed, impossible to remove any !
I did this and it worked for me, no feedback off the diff's not working OK.
Also, to do a good job, you gotta drop the diff back plates to drain the oil and check for any debris, metal bits floating around etc. Clean them up and us RTV fluid to seal them back, no gaskets.
Then add the correct amount of oil.
To have no confusion, buy your diff oil from a Jeep dealer, pay the higher price and add the excact amount of additive they say.
Although sometimes, do you find yourself telling the parts guy what you need and thinking to yourself you know more than he does !!
Simples
Here's the confusion, sometimes...
I have Quadradive, and rather than buy 2 differnet oils, I just put the expensive fully synth front and back. The manufacturer (I forget which) says it's for LSD's but dont say there's any additive.That left me confused a bit......
So reading some of the USA forums, owners were using this fully synth oil and adding half the Mopar recomended additive, and driving them on full lock to see if there was any judder. Easy to add a bit more if needed, impossible to remove any !
I did this and it worked for me, no feedback off the diff's not working OK.
Also, to do a good job, you gotta drop the diff back plates to drain the oil and check for any debris, metal bits floating around etc. Clean them up and us RTV fluid to seal them back, no gaskets.
Then add the correct amount of oil.
To have no confusion, buy your diff oil from a Jeep dealer, pay the higher price and add the excact amount of additive they say.
Although sometimes, do you find yourself telling the parts guy what you need and thinking to yourself you know more than he does !!
Simples
MatrixXXx said:
If you have the Quadradrive you use the normal diff oil SAE 75W-140 Synthetic front and Thermally stable SAE 80W-90 gear lube (or the 75w-140 for heavy use) rear and add friction modifier. 4oz per diff .
Careful how you read the FSM's, they cover the US d35 and D44a axles. UK only got the D44a If you have quadradrive you need the FM front and rear with 75w-140, if you have quadratrac you don't & can use 80w-90 in both axles. If your diff is still rust free & they haven't been lost in a previous service the diff tags will stil be on them & will tell you the oil you need. Its better to put 75-140 in a WJ axle to be safe than to put 80w-90 in a quadradrive & cook the clutch plates. As said most 75w-140 says its for clutch LSDs. I did as PCN to find the correct amount of FM to use with castrol syntrax oil (about 2oz front & rear, rear less as less prone to locking on tar roads when turning)
Edited by scrwright on Monday 16th June 22:16
MidnightXR6 said:
Can i chip in and ask if this would be same for an 06 commander crd?
don't have any FSM's for Commanders, suggest asking at www.jeepforum.com although the transmission is the same as the WK Grand Cherokee so this may be useful http://www.wkjeeps.com/wk_maintenance.htmEdited by scrwright on Monday 16th June 22:25
pcn1 said:
If you have the Quadradrive you use the normal diff oil SAE 75W-140 Synthetic front and Thermally stable SAE 80W-90 gear lube (or the 75w-140 for heavy use) rear and add friction modifier. 4oz per diff .
Here's the confusion, sometimes...
I have Quadradive, and rather than buy 2 differnet oils, I just put the expensive fully synth front and back. The manufacturer (I forget which) says it's for LSD's but dont say there's any additive.That left me confused a bit......
So reading some of the USA forums, owners were using this fully synth oil and adding half the Mopar recomended additive, and driving them on full lock to see if there was any judder. Easy to add a bit more if needed, impossible to remove any !
I did this and it worked for me, no feedback off the diff's not working OK.
Also, to do a good job, you gotta drop the diff back plates to drain the oil and check for any debris, metal bits floating around etc. Clean them up and us RTV fluid to seal them back, no gaskets.
Then add the correct amount of oil.
To have no confusion, buy your diff oil from a Jeep dealer, pay the higher price and add the excact amount of additive they say.
Although sometimes, do you find yourself telling the parts guy what you need and thinking to yourself you know more than he does !!
Simples
That's why I went for a fully synth with no additive then add FM as recommended, to much can cause excessive dif slip ( or so i am lead to believe)Here's the confusion, sometimes...
I have Quadradive, and rather than buy 2 differnet oils, I just put the expensive fully synth front and back. The manufacturer (I forget which) says it's for LSD's but dont say there's any additive.That left me confused a bit......
So reading some of the USA forums, owners were using this fully synth oil and adding half the Mopar recomended additive, and driving them on full lock to see if there was any judder. Easy to add a bit more if needed, impossible to remove any !
I did this and it worked for me, no feedback off the diff's not working OK.
Also, to do a good job, you gotta drop the diff back plates to drain the oil and check for any debris, metal bits floating around etc. Clean them up and us RTV fluid to seal them back, no gaskets.
Then add the correct amount of oil.
To have no confusion, buy your diff oil from a Jeep dealer, pay the higher price and add the excact amount of additive they say.
Although sometimes, do you find yourself telling the parts guy what you need and thinking to yourself you know more than he does !!
Simples
MatrixXXx said:
InitialDave said:
Yes, use ATF4 in the auto gearbox. I suggest changing the filters while you're at it.
The transfer box oil, if bought from a dealer, is Arbor MTF. Changed to this from the Mopar branded one when the Fiat-Chrysler marriage happened. You do not need to put an additive into it. Normally comes in a 5L container, unfortunately, which is about triple what you actually need, so if you know someone else who runs the same transfer case, split the cost with them.
For the diffs, yes, if you have the vari-lok gerotor differentials that came with QuadraDRIVE system, not Quadratrac II, use the Mopar gear oil (which contains no friction modifiers), and add in the Mopar friction modifier to that. You get slightly different mix ratios depending where you check your information, but 7% friction modifier is about right.
If you have the open-diff Quadratrac II, yeah, just good quality oil of the weight mentioned above.
Oh, and thanks to some intelligent design choices, only the transfer case has a drain plug. The gearbox and axles need removal of the sump/diff covers respectively to drain them, which is a faff. Don't foget to get yourself some gasket goo for refitting them.
http://www.wjjeeps.com is a really good reference for these Grand Cherokees.
If you have the Quadradrive you use the normal diff oil SAE 75W-140 Synthetic front and Thermally stable SAE 80W-90 gear lube (or the 75w-140 for heavy use) rear and add friction modifier. 4oz per diff .The transfer box oil, if bought from a dealer, is Arbor MTF. Changed to this from the Mopar branded one when the Fiat-Chrysler marriage happened. You do not need to put an additive into it. Normally comes in a 5L container, unfortunately, which is about triple what you actually need, so if you know someone else who runs the same transfer case, split the cost with them.
For the diffs, yes, if you have the vari-lok gerotor differentials that came with QuadraDRIVE system, not Quadratrac II, use the Mopar gear oil (which contains no friction modifiers), and add in the Mopar friction modifier to that. You get slightly different mix ratios depending where you check your information, but 7% friction modifier is about right.
If you have the open-diff Quadratrac II, yeah, just good quality oil of the weight mentioned above.
Oh, and thanks to some intelligent design choices, only the transfer case has a drain plug. The gearbox and axles need removal of the sump/diff covers respectively to drain them, which is a faff. Don't foget to get yourself some gasket goo for refitting them.
http://www.wjjeeps.com is a really good reference for these Grand Cherokees.
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