What trans and diff do I have?

[boolinhemi]

I have a 2003 Ram 1500 with a Hemi and 4x4. it is an automatic transmission and when I went to go buy fluid for it it gave three different options for the transmission and three different options for the differential fluid. What transmission and differential would my ram have?

 

[ST-8]

9.25 diff an most likely a 545 trans if you have a 3.7 4.7 or5.7

 

[charonblk07]

I have a 2003 Ram 1500 with a Hemi and 4x4. it is an automatic transmission and when I went to go buy fluid for it it gave three different options for the transmission and three different options for the differential fluid. What transmission and differential would my ram have?

45/545rfe trans, takes ATF +4 across the board. 3 different fluids listed are for front diff, rear diff w/ LSD, and read diff w/o LSD. If you're wondering about the 9.25, 10.5, or 11.5, it's most likely a 9.25 but you can always count the number of bolts to be sure: the 10.5 has 14 bolts and the 9.25 has 12 bolts.

 

[boolinhemi]

Thanks for the replies. So I should put atf+4 in the transmission and differential? I will have to check the number of bolts in the differentials. Can the front be different from the rear? Different fluid too? How could I tell if it has lsd or no lsd?

 

[charonblk07]

ATF +4 in the trans only. The rear diff with take 75W-140 (with friction additive if you have a LSD) and the front diff will take 75W-90. The front will be a corporate 8.25, that hasn't changed in many years.

 

[hemidup]

Use ATF+4 in the transfer too.