Look for 2 letters (unless yours is after 1970 as I recall). Mine is RA. Here is what you'll probably find if you have a truck rear end:
HB,LL,RA.TR,TT,TU are 3.07
HA,HJ,HQ,MF,TQ,MI,MK are 3.73
HK,HL,HR,ME,MG,TS are 4.11
HC,HN,MU are 3.73 Posi
HO,HP,JQ, are 4.11 Posi
If you have a passenger car rear, please tell us and we may be able to ID it also.
