I just bought an 07 SRW 3500. I'm trying to figure out what the rear axle gear ratio is. Is there a code on the door jamb sticker that identifies the ratio? Also, does any one else think that front & real axle fluid changes (owners manual maintenance sched) at 15K excessive? Thanks

 

it will have 3.73s unless it states otherwise on the window sticker. 3.73s were standanrd and 4.10s were the option you had to pay for and it will list it on the window sticker