Question for 94 mustang GT

[ranger99]

Hey guys, I have a 94 GT with only 14K on it, I've owned it since new. I have never changed the rear diff fluid before and really want to now, especially after reading on here for a while. Question is, the manual calls for a 90 weight, I have recently acquired for free 3 quarts of Chrysler synthetic 75-140 and the chrysler friction modifier. Would this be fine to use or should I get the 80w90 conventional and XL-3 ford friction modifier?

Thanks for any input you have.

 

[Jason2007]

You can use it as Ford later updated the 8.8 to run 75w140.

 

[ranger99]

Thanks for the response. What about using the Chrysler friction modifier? do you think it would close to the same as the Ford stuff?

 

[dwcopple]

probably darn close...if there is an issue than just change it again.

 

[RF Overlord]

The 75W-140 will be fine.

Ford's FM is specified for the clutch materials used in their differentials. Whether the Chrysler FM is compatible...???