What Transmission Oil Do You Use For The G56 Trans

[CumminsForYa]

I've read from various resources that ATF+4 should NOT be used in the G56 Transmissions when running a modified engine.

Is there any merit to this?

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[OneTon]

ATF is garbage in the G56, even in stock form.

That said, I use Amsoil MTG 75W-90 in mine with good results.

Long as whatever you use isn't ATF and is GL-4 rated, you're good to go.

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[CumminsForYa]

Thanks for the advice.

Do you know why that is?

ATF+4 isn't thick enough or what?

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[watersupply189]

I use Hotshots G56 transmission fluid in mine.


2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

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[OneTon]

Thanks for the advice.

Do you know why that is?

ATF+4 isn't thick enough or what?

Spot on.

ATF is way too thin.

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[JMueth2020]

Mobil Delvac 1 synthetic transmission fluid SAE 50.

I bought a 5 gal pail.

Roll-over noise is barely noticeable.

A bit stiff when shifting at first if the outside temp is cold but smooths out once the trans warms.

I could immediately notice a difference, though, after switching from ATF4 to the SAE 50.

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[cumminsdieselfreak]

Amsoil 75-90 GL4 transmission fluid.


Sent from my iPhone using Tapatalk

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[Tomcat1]

I have used Redline MT90 in the past, and it is some good stuff for noisy or stiff trannys.

Sent from my SM-G960U using Tapatalk

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[JMueth2020]

Any experience with Amsoil Long-Life Synthetic SAE 50 trans lube?

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[JMueth2020]

I put some Ravenol fluid in a 4runner last year.

I was looking at Ravenol for BW 44-46, and their BW 44 Transfer Fluid is specified compatible.

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