I am a new member to this site and am hoping you guys can help. I tried a couple of searches with no results. I want to put a detroit locker in the front differential of my truck but am having a hard time finding what differential I have. I assume that it is a dana 60 becasue it has a 10 bolt cover and looks the part. However I can't recover the bill of material number. The only numbers I have found are 620093R and 4228. The people at trachtech tell me those numbers don't help. I basically need to know how it is geared as well. The door tag has the code C9 which I believe means the rear is a limited slip 3.55 ratio.

VIN: 2FTHF36G8SCA09399

Thanks for you time and for any help or guidance I recieve.

 

There is no other front axle that I know of that has a 10 bolt cover and sits under the front of an F350. You can bet it's a Dana 60.

 

Putting a Detroit locker in the front differential is very dangerous unless it is ONLY used off road in soft material. If you've ever had one you would know why.

Use it instead in the rear housing which will either be a 10.25 or 10.50 ring gear housing. Check the year.

The front differential would work well with a clutch style limited slip package.

A combination of the two should allow the truck to climb walls and get noticeably worse fuel economy.