1999 ford f-150 rearend problems

[biggastonman]

I have a 1999 ford f-150 4 x 4, with a bad rearend, it presently has a 8.8, 355 ratio jasper reaerend, wanting to know if anything else could replace it or does it have to be the same thing that is in it now and where could i obtain parts for it or a used reaerend.
This is the information from the tag on it:
wb-120 axle h9 r-9 tr-m spr-2n


rearend i.d. no. F7TW-4025-AA
ANY HELP WOULD BE A BIG HELP, Down here in the country of south carolina not many people knows that much about a rearend,Thanks, Doug

 

[Mark_88]

Welcome to TRS~!

It may be better to post in one of the appropriate threads...many of the Gurus don't venture to this forum so getting an answer can take a bit longer...