I recently purchased an '87 F250 extended cab 4X4. Auto. with a 460 and a DANA 50 front. Does anyone know what type of rearend was installed in these trucks and what the ratios are for the front and rear ends? I got it at a steal for a 1000 bucks!

 

10.25" rear. Probably 4.10's but there's a tab on the differential that'll give you the ratio.

 

or check the axle code on the door tag (if its still there) and post up the code.. someone here will be able to tell you the ratio.

 

The code on the door jam says 'C9' which would be a 3:55 LS. My frontend has a DANA 50, and from what I have been reading on here, they came with 4:09 gears. It doesn't seem right to run a 4:09 front and a 3:55 rear.

 

It may be 3.55 all the way around.. my 90 is listed as a C5 which is a 4.10.. but I also have the 8800lb GVW chassis.

 

stirling 10.25 in the rear probly , i was lucky on my ford i have dana 60s front and rear ... never really liked the stirling set up..


jayson