Rear Diff. Amsoil???

[Jack in Alaska]

I need to replace the rear diff. fluid and want to use the latest/greatest Amsoil synthetic.

My application is a 98. 5 3500 (80 Dana),

temp. range from -20F to 100F and towing a large 5th. whl.

What is the proper Amsoil product to put in????

Thanks for any info... ... ... Jack

 

[Sled Puller]

The Series 2000 75W-90, 75W-140, either would be sufficient.



How much do you tow?

 

[John Berger]

Dittos to what Sled puller recommended. I'd go with the 140 weight though. I'm towing a TT and it is probably not as heavy as your 5'ver and I see temps in the differential up to 230 degrees, depending upon the weather.