3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

G56 service

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Old 07-27-2007, 11:19 AM
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G56 service

Did a search on this but didn't find a whole lot. The G56 is ready for a service and I am wondering what the high mileage guys are running. Amsoil in everything including diffs and transfer case also? Or is there something else I should look in too?
Old 07-27-2007, 01:21 PM
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I have not used anything but the AMSOIL ATF in my G-56... Never has given me an ounce of problems..
Old 07-27-2007, 01:26 PM
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How many miles?
Old 07-27-2007, 01:33 PM
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Originally Posted by Roperteacher
I have not used anything but the AMSOIL ATF in my G-56... Never has given me an ounce of problems..
I will agree with Roperteacher for Amsoil ATF in the g56 as I have one and used Amsoil. But, I recently installed Redline C+ATF and noticed a DEFINITE MPG increase (small) and even a little bit more response on the pedal. The performance is about the same as far as shifting goes, though- so take your pick.
Old 07-27-2007, 03:33 PM
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How many qts are you puting in the G56? The manual says 6qts but I have read about people over filling?
Old 07-27-2007, 04:35 PM
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Don't get the overfilling issue confused with the NV5600 threads!! Some NV guys are overfilling because if you are towing up a steep incline the fluid starves the front bearings or something.. LOLOL The G-56 takes 6 quarts. I pumped in 6 quarts on level ground and it still didn't come ou tthe hole. I put in about a half a quart more and it began to run out so I plugged it and off I went!
Old 07-27-2007, 05:25 PM
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Same with me.
Old 07-27-2007, 05:42 PM
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Sounds like I will be getting 7 quarts of amsoil and getting it done. You guys running the same in the transfer case?
Old 07-27-2007, 06:05 PM
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thanks, im going with a synthetic like the Mobil1 automatic trans fluid
Old 07-27-2007, 06:18 PM
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Yes, I run the same ATF in my 2002 transfer case. Between the 06 I had and the new 07 I only have about 20,000 combined miles on the ATF in the G-56.. lots of pulling and seems OK!
Old 07-27-2007, 10:49 PM
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Same with me as well, running my choice in the TCase as well.
Old 08-08-2007, 12:10 PM
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How many quarts for the transfer case?
Old 08-08-2007, 07:09 PM
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Originally Posted by doznfire
How many quarts for the transfer case?
IIRC, I put in two and a bit or tight around two. It was pretty hot that day.
Old 08-08-2007, 08:05 PM
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Where is a good place to get Amsoil? Im coming up on my G56 change.

Thanks

Buddy
Old 08-08-2007, 08:51 PM
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Go to Amsoil.com, you can put in your zip code to find your nearest dealer.
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