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2010 386

Discussion in 'Peterbilt Forum' started by TruckerPete1990, Mar 22, 2015.

Mar 22, 2015 #1

TruckerPete1990 Road Train Member

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Jul 16, 2012

Bentonville Arkansas

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Gonna be buying a 2010 ultshift with 2.64 rears. Anyone know what the rpm would be at 65? Also any input on this truck would be great

TruckerPete1990, Mar 22, 2015

TruckerPete1990, Mar 22, 2015

#1
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Mar 22, 2015 #2

double yellow Road Train Member

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Aug 28, 2011

State of Jefferson

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That's probably direct drive (LAS 10B), which at 65mph would be 1425rpm with LP22.5's or 1375rpm with LP24.5's.

In the unlikely event it has an overdrive transmission (LAS 10C), at 65mph you would be at 1050rpm with LP22.5's or 1000rpm with LP24.5's

Last edited: Mar 22, 2015

double yellow, Mar 22, 2015

double yellow, Mar 22, 2015

#2
Mar 22, 2015 #3

Freightlinerbob Road Train Member

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Jan 15, 2012

West Coast B.C.

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Tire RPM x trans final drive ratio x diff ratio = RPM @ 60 MPH.

RPM / 60 x 65= RPM @ 65 MPH

Freightlinerbob, Mar 22, 2015

Freightlinerbob, Mar 22, 2015

#3
Apr 26, 2015 #4

pearcetrucking Light Load Member

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Aug 14, 2012

Gainesville, FL 48states

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I have that same setup on my 2010 386. It's 1425 at 65.

pearcetrucking, Apr 26, 2015

pearcetrucking, Apr 26, 2015

#4

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