Been running 4.88's for about a year now, and just put 35's on it last month. The 4.88's were a bit much with 33's on the street, but the 35's put the speedo within 1mph of my GPS at highway speeds. Haven't had time to hit the trails yet, so I can't comment. Oh....no D35 here, I run a Ford 9" rear.

Well I just put on some TrXus 35's and run at the moment with 4.10's. It's actually doing okay, but have noticed that the engine is working a little harder. One way or another I had gone and ordered 4.88's with a HD Yukon shaft for my Dana35c. Right now it hasn't stopped me from playing and I like to play a lot as much as possible.

i run 4.56's with my 35's and i actually think its a good number to run. after about a yr of usage you pretty much have 33's (new) anyways ..

it shouldn't make much difference in milage, so go with the lower

Well, it's done and changed over to 4.88 gears and I noticed an immediate difference going up hills especially in 3rd gear. Didn't have to floor it to go up. Anxious to try it out this summer.