Mobil 1 Synthetic ATF - Anyone tried it? Experiences?

[ACR Joe]

The label states that it meets Dexron III requirements. My questions are:

1) Lubrication effectiveness?

2) NGR impact?

Thanks .....

 

[Qualitywires.com]

I was told not to use it. I think Mobil one said that it would not work with the brass syncro's. I use mobil one for the engine and that's about it. I use the castrol syntorque for my tranny. The dealership has it for heavy gear lube.

 

[Matt M PA]

Greetings Joe! When I had my '96 & '94 I switched them to the newer Mopar fluid (same as the Syntorque metioned above). I understand that this newer fluid is what has been factory installed since 98 or 99. I too heard the brass syncro story listed above. Anyhow, I think your car should already have the right stuff. In my cars, it really didn't eliminate the NGR, it just reduced it a bit.

 

[Mamba man steve]

I'm not sure what and where you are using ATF = automatic trans fluid. It could only be used in Viper Power, Steering. NOT IN TRANSMISSIONS.

 

[Geoff Green]

ATF was standard fluid for the transmission until '98.5

 

[ACR Joe]

Steve Waiting - The Owner's Manual states that Dexron III should be used in the transmission, hence the relevancy of my question.

I'm not inclined to tempt fate here so Castrol Syntorque it will be.

I also couldn't find 75W-140 axle fluid and settled for 85W-140. The latter is synthetic and conforms to API GL-5 standards as required so it's simply the viscosity difference I'm concerned about.

Thanks for your collective input .........

 

[Charlie]

Joe
I think you will find that the GL-5 rating isn't the same and isn't better than the GL-4 rating. If my memory serves me correctly the GL-5 fluid is the fluid that is suggested for rear ends and transmissions that don't have brass syncros (large trucks) .. Go with one of the part numbers above for the Syntorq. I found it to be cheaper at the GM dealer and more of them stocked it.

Charlie

 

[Chuck 98 RT/10]

Hey, AB. Your in Tampa. Where do you get Castrol Syntorque? It seems hard to find.

 

[Geoff Green]

In the '98 manuel it says to use Dexron III for the transmission, but in '98.5 it was changed to Castrol Syntorque. Castrol Syntorque is also packaged under the Mopar and GM label. The Mopar # is 4874459 and the GM # is 12346190. Also, Mopar's 75W140 synthetic gear and axel lube is part # 04874469.

 

[Tom F&L GoR]

caution ... caution

power steering fluid and ATF are not the same. PSF has more anti-wear additive because of the higher pump pressures. You need the PSF to protect the vane pump in the power steering system.