Axle ratio descrepency

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Oct 4, 2009 | 06:11 PM

#11

1954Radio

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Joined: May 2009

Posts: 731

Likes: 1

From: Louisiana

Quote:

Originally Posted by jayman84

or just drive it down the road and look at the tach. my truck has the 3.55 rear end and going 60mph my motor is turning 1650 rpms or 1450 rpms with the torque converter locked. if yours is higher then you have 3.92, if its lower then you have 3.21

Mine is at 2000 rpms at 70 mph with 17" wheels

Oct 4, 2009 | 07:49 PM

#12

jayman84

Captain

Joined: Aug 2009

Posts: 570

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From: middle of the state, IA

at 70 i'm running about 1750-1800rpms, at 75 i am just a hair under 2000. and again that is with 3.55 and 20" wheels

Oct 4, 2009 | 07:58 PM

#13

004x41500

Record Breaker

Joined: Aug 2009

Posts: 1,374

Likes: 3

From: Sebastian, Fl.

you can go to the dealer, and request a build sheet. all you have to do is take the vin number. and it will show you exactly what your truck has.

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