Hey everyone i need some help on telling me what gear ratio i have in an 88 1 ton 4wd that i have a chance to get a hold of, the axle code was i belive 86 (could of been 88 too), but the front axle is a dana 60 and the rear is a ford 10.25"

 

88 manual says Dana 60 is on F350/10.25 is on F250and F350. No code 86/88 listed- axle code on door jamb will be 3 digits for 4wd with limited slip (3rd digit is 2). B9 is 4.10 5300# axle; C9 is 6250# 3.55axle; 69 is 8250# 3.55 axle; none of the other codes appear to match 88/99 listed above See if you can find a tag on front and rear axle and post what is on tags.

 

I wish i could go check the truck out right now but its 3 hours south of me.

Anyway the truck is an 88 f-350 Crew cab for sure, and the front axle is a kingpin dana 60, and the rear is a 10.25" stereling, that is what i know for sure, now i know that the last number was either a 6 (which is what i'm pretty sure it is) or it could be an 8, it could be a B9, but i am fairly sure that its not a ls rear, so if possible could you check the other possible ratios with a 6 or 8 thats a non LS, thanks.

 

29 is 5300# 3.55; 39 is 6250# 3.55; 49 is 7400# 3.55; no 6's or 8's in last (2nd digit) location. Al 4.10 axle codes over 3800 end in 5. If you can see the tag the ratio is on tag.

 

Thanks for the help, i'm thinking now that its either a B9 or 39, thanks again.