gear ratio with 40s?

[nvrenuf]

I also run 5.86's (w/ 43's). I went with 5.86 because it still has decent tooth contact compared to 6.17+ (iirc, 3 vs 2?). As for the small pinion, yeah it's small but so were my 5.13's. It's all relative.

 

[70jimmy]

Mine could use gear changes, but I think I will wait for a Dana 60 front instead of the hub shredding 10 bolt. 5.38 I think would work well for me, 350 TBI, 400, 203/205?

 

[RootBreaker]

i am running 4:56s with the same.. smc465/np205 and it works.. but i havent really wheeled much.. typical trail riding but these work for me... but with 40" hawgs...

 

[black dawg]

5.13s will be fine seeing as how the 4.56s were working pretty good. just needed a little extra gear, and planned on having stuff apart anyway.

I have heard of several broken 5.38 60 pinions from local guys here so I guess that kept me from "going big". Have to err on the side of too strong with this truck as breakage could mean a days walk (on snow) just to get to cell service. One of these days I will get some pictures posted up of how this suburban gets used.

 

[RootBreaker]

Rockwells... have 6:72s ... hah... doubt youll break them!