Found on cruze forums...trans fluid for M32 and 6T30/40

[HotBoxer]

Found this thread while researching the Sonic's transmission, which the Cruze also shares...multiple people suggesting that the OE transmission fluid is not very good, and they are seeing "night and day" differences by switching over to Amsoil Fuel Efficient ATF for the automatics and Amsoil Syncromesh for manuals.

Might be worth a read if you are having any issues with your trans.

AMSOIL Signature Series Fuel-Efficient Automatic Transmission Fluid

 

[ScarabEpic22]

Yep, this is a known topic. Amsoil, Redline, and others make GL4 compatible fluid that works well in the 6MT M32 that's prone to grinding and whining.

 

[$ub$onic]

All 3 of my sonics run AMSOIL everything

If anyone is interested in AMSOIL, shoot me a pm, I can hook you up




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[steadite]

I put Amsoil in mine (a warranty-replaced 6M on a 2012). If anything, the 1-2 shift is "crunchier" and I can barely get it into reverse if the temperature <30F. YMMMV

 

[$ub$onic]

I put Amsoil in mine (a warranty-replaced 6M on a 2012). If anything, the 1-2 shift is "crunchier" and I can barely get it into reverse if the temperature <30F. YMMMV

Did you use the synchromesh?

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[steadite]

no, good point, I missed that detail in the original post. I thought these were supposed to use GL-4 oil??

 

[$ub$onic]

no, good point, I missed that detail in the original post. I thought these were supposed to use GL-4 oil??

You are correct, GL-4.

Although the mesh is not a GL-4 spec. It yields fantastic results in the m32.

Many Cruze guys run it with no ill effects to date

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[cuartz7o]

Hi All. For the m32 ('13 rs) would I need 2 or 2.5 qt? On cruze forum the range was 2-2.2qt but in the sonic forum I've seen as high as 2.5qt?

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[Papasonic]

I put Amsoil in mine (a warranty-replaced 6M on a 2012). If anything, the 1-2 shift is "crunchier" and I can barely get it into reverse if the temperature <30F. YMMMV

This is a little off topic; but regarding proper transmission lubricants and viscosity:
Years ago I purchased a 1965 Plymouth Valiant 6 cylinder 3 speed manual from a fellow who sold it to me because it wouldn't shift properly, especially when cold. After further review, and after researching the proper lube specs for this particular vehicle; I discovered the transmission had 90 weight gear lube installed. The specs called for ATF fluid in this particular gearbox in this year. After replacing with the proper lubricant, the transmission operated perfectly for many years afterward.
My point is; follow the specs to the letter regarding the proper lubricant and viscosity for the application.

 

[$ub$onic]

Hi All. For the m32 ('13 rs) would I need 2 or 2.5 qt? On cruze forum the range was 2-2.2qt but in the sonic forum I've seen as high as 2.5qt?

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Factory fill is like 1.8 quarts of some crap. If you look at the m32 over seas the fill is meant to be 2.5.


Fill to 2.5 quarts

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