Thread: 55.2-59 Rear Diff questions
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Old 12-09-2019, 02:33 AM   #35
joedoh
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Re: Rear Diff questions

Quote:
Originally Posted by vintovka View Post
This thread made me curious. My 54 on a GMC sierra classic chassis with 350, 700R4 and 3.08 turns 1100 rpm at 60 MPH with 33" tire. It has all the low end torque i need and seems to deliver bout 15 MPG. Any of this seem right?

with a 33" tire and 30% overdrive, a 3.08 should turn about 1300 rpm. sounds like you have a 2.73
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