Dodge Cummins Diesel Forum - View Single Post - What gear for 37s
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post #13 of (permalink) Old 09-06-2019, 09:51 AM
kylant
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Quote:
Originally Posted by Cummins_Michael View Post
Thanks for all the replies.

Couple more questions.

What rear end do I have? 11.5 or 11.8? My truck is a 3500 srw.

Also....any of you ever thought about 4.30s or 4.10 the better route?
Quote:
Originally Posted by nick00less View Post
You have an 11.8 however a 11.5 will fit. Both are in the same 14 bolt housing. They just use different bearings for their associated R&P
are you sure??
I have an '18 3500 SRW with Aisin, my build sheet says 11.5"
I have been wondering the same thing, is it 11.5 or 11.8


'18 3500 Mega Aisin, Carli suspended
13 3500 CCLB Aisin, Carli suspended
'11 2500 Mega, Carli suspended
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