[Every Day Diesel]

I want to change my transmission spin on filter and will have to add fluid. My question is can I use Mobil 1 syn trans fluid to top off?

As always thanks for the help....

 

[towin43]

Yes, you can use Mobil 1. Simply pre-fill the new filter before installing and you're good to go. Make sure to clean and reinstall the filter magnet.

 

[Every Day Diesel]

I should mention the fluid in the transmission is factory, truck only has 6600 miles on it.

 

[Bodysurfer]

Wont hurt it.

 

[LONGHORN Dad]

Allison 1000 information

The Allison website has a special FAQ section
for pickup owners. It has it all, the type of fluids, filters,
maintenance intervals, even the amount of fluid to add
when changing the filter only.