Differential & Xfer Case Fluid Change - Page 3 - Jeep Garage - Jeep Forum

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  #25  
Old 07-17-2016, 12:25 PM
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Re: Differential & Xfer Case Fluid Change

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Originally Posted by Floridaman View Post
Is this something you can do yourself? I've done everything myself but this. And I look for any reason to not have to take it to the dealer.
Same here I don't go to the dealer for anything I can do myself. yes this can de done in driveway. the only thing that's a bit different about this trans then others I have worked on is that it does not have a dipstick and dipstick tube to add fluid. it must be added through a fill port in the side of the trans. vehicle must be running when adding the final amounts of fluid so care must be taken when getting under a running vehicle to add fluid. if you have quadra lift putting it all the way up will definitely help.

this place has the best price I have seen on this 8spd trans fluid $17 a litter, its often $45 a litter at other places. you really wont find a better price than this. what I have not been able to find is a good price on the filter pan, it runs around $250 which I guess is as good as it gets for now. this is an expensive trans to work on. dealers often want $1000 for the filter pan and fluid change. so if we can do it for roughly $370 ($250 pan and $120 on fluid) there is a savings to DIY

LifeGuard 8 Transmission Fluid

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  #26  
Old 07-17-2016, 01:09 PM
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Re: Differential & Xfer Case Fluid Change

This is definitely a DIY job if you have the basic equipment. You gotta get the vehicle off the ground though (at least another foot) as there's just not enough room to work otherwise.

Once I drained the old fluid overnight, I filled the pan till it was draining out the fill hole. I was only able to put 2.5 liters in before it started draining back out. The instructions say that the process of re-filling needs to be done when the transmission fluid is between 86 and 122 degrees Fahrenheit. I put the first 2.5 liters in with a small hand pump that probably took 10 minutes per liter. I was concerned I would get to 122 degrees before I could get the other 3.5 liters in so I bought a 1 gal garden sprayer and rigged up tubing so that with a few pumps the other 3.5 liters would go in under pressure and quicker. This was cost effective and worked well. I had someone in the driver's seat going through the gears and monitoring the trans temp on the EVIC. The trans was in park the whole time I was pumping fluid in.

Yeah the other 3.5 liters went in in about 5 minutes and I wasn't near 122 degrees. I'm sure I wasted/spilled a quarter to a half liter trying to get that damn fill plug back in with my hands so slippery but the fluid was definitely coming back out the fill hole.

I drove the GC about 15 miles and got the trans temp up to the high 150's so everything was fine with the shifting. Glad I did it.
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  #27  
Old 07-17-2016, 01:48 PM
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Re: Differential & Xfer Case Fluid Change

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Originally Posted by Treeguy View Post
This is definitely a DIY job if you have the basic equipment. You gotta get the vehicle off the ground though (at least another foot) as there's just not enough room to work otherwise.

Once I drained the old fluid overnight, I filled the pan till it was draining out the fill hole. I was only able to put 2.5 liters in before it started draining back out. The instructions say that the process of re-filling needs to be done when the transmission fluid is between 86 and 122 degrees Fahrenheit. I put the first 2.5 liters in with a small hand pump that probably took 10 minutes per liter. I was concerned I would get to 122 degrees before I could get the other 3.5 liters in so I bought a 1 gal garden sprayer and rigged up tubing so that with a few pumps the other 3.5 liters would go in under pressure and quicker. This was cost effective and worked well. I had someone in the driver's seat going through the gears and monitoring the trans temp on the EVIC. The trans was in park the whole time I was pumping fluid in.

Yeah the other 3.5 liters went in in about 5 minutes and I wasn't near 122 degrees. I'm sure I wasted/spilled a quarter to a half liter trying to get that damn fill plug back in with my hands so slippery but the fluid was definitely coming back out the fill hole.

I drove the GC about 15 miles and got the trans temp up to the high 150's so everything was fine with the shifting. Glad I did it.
so as long as you stay in the specified temp range you really cant over fill it right its just a matter of making sure you get enough in before temps rise to over 122. so a method to rapidly input the 6L in while the jeep is running while in park would be benifical rather than the standard 1 quart hand pumps correct?


do you think something like this would work good? it claims 3 liters per minute for oil

https://www.amazon.com/Fluid-Diesel-...d+pump+for+oil
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  #28  
Old 07-17-2016, 03:19 PM
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Re: Differential & Xfer Case Fluid Change

I was probably more concerned about the upper end temp than I needed to be. Instructions were that if you reach 122 degrees that you had to shut the process down and I didn't want to lengthen the job another 12 hours to let the temp cool down to 86 again. Heck, down here in MS, it's already so hot that the trans temp was already 91 degrees and the vehicle had been off for 12 hours.

The electric pump looks fine and no, I don't see that you can overfill this thing due to it running back out the fill hole when it's reached capacity.
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  #29  
Old 07-17-2016, 03:30 PM
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Re: Differential & Xfer Case Fluid Change

Amsoil Multi Vehicle ATF is an acceptable alternative for ~$12/qt or less
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Old 07-17-2016, 05:28 PM
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Quote:
Originally Posted by BigJosh View Post
Amsoil Multi Vehicle ATF is an acceptable alternative for ~$12/qt or less
Thanks, but I'd rather keep my transmission warranty rather than save $30 on a drain/fill that's performed every 50,000 miles.
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  #31  
Old 07-17-2016, 05:31 PM
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Re: Differential & Xfer Case Fluid Change

I thought the Drain on the 8 speed pan was kinda a one time use being plastic

as the Pan is the filter also. but the filter/pan is like $250

but yeah no changes for Life my ass.
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  #32  
Old 07-17-2016, 06:14 PM
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Re: Differential & Xfer Case Fluid Change

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Originally Posted by Roadkill View Post
Thanks, but I'd rather keep my transmission warranty rather than save $30 on a drain/fill that's performed every 50,000 miles.
You don't think your warranty would be voided, would you?
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  #33  
Old 07-17-2016, 06:53 PM
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Re: Differential & Xfer Case Fluid Change

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Originally Posted by BigJosh View Post
You don't think your warranty would be voided, would you?
You don't have proof that using an unapproved transmission fluid on these transmissions would not void the transmission warranty, do you? Or are you saying you have proof that ZF has approved this Amsoil product that you are touting?

ZF calls for Lifeguard 8.
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  #34  
Old 07-17-2016, 07:17 PM
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Re: Differential & Xfer Case Fluid Change

AMSOIL Limited Warranty - Lubricants
I wouldn't hesitate for 1 second to use in my GC.
I was just stating there are alternatives to Mopar and Lifeguard 8. I think Pentosin even makes an equivalent fluid.
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  #35  
Old 07-17-2016, 07:22 PM
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Quote:
Originally Posted by BigJosh View Post
AMSOIL Limited Warranty - Lubricants
I wouldn't hesitate for 1 second to use in my GC.
I was just stating there are alternatives to Mopar and Lifeguard 8. I think Pentosin even makes an equivalent fluid.
Yea but does it meet or exceed the ZF specs. Like I don't remember seeing it on the data sheet at all. ZF transmissions are a different animal than something like a transfer case. The specs say it meets or exceeds Chrysler MOPAR ATF +4, but I don't see it saying anywhere it does the same for ZF
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Old 07-17-2016, 07:24 PM
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I chose Amsoil and have 20K miles on it now.
The plug is reusable but if you damage it,it can be purchased separate of the pan.
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