I have a 08 F350. I cannot find the size rear end I have. The tag on the rear end is covered in something from the factory and can not read it. Is there another easy way to find out what size it is? Without having to call the dealer. Not that it is not hard to call, just trying to figure it out myself.

 

10.5? Or are you talking about what gears you have?

 

yes, I dont know if it 10.5 or 10.25. I have 4:10 gears.

 

I believe its a 10.5

 

SRW is Visteon (Ford/Sterling) 10.5

DRW is Dana 80

https://www.fleet.ford.com/truckbbas...0-450_08bb.pdf

 

Thanks, 10.5 is what I was thinking also. I want to install a true trac diff. I need the size so I can order it. However the site for them doesn't differenciate between the 2. It shows the same number for both 10.5 and 10.25. I am thinking it is the same Diff for both size rear ends.