What Gears Do I have

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by cgilliland, Jan 21, 2022.

Jan 21, 2022 #1

cgilliland Medium Load Member

321

739

Mar 13, 2017

0

Seller said 3:36, me thinks 3:55
how can i tell for sure

the calcs dont seem to return a clear answer
18spd
22.5LP
top gear 72mph at 1650rpm

cgilliland, Jan 21, 2022

cgilliland, Jan 21, 2022

#1
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Jan 21, 2022 #2

062 Road Train Member

5,849

31,665

Oct 20, 2013

0

Vehicle Speed Calculator
Need to know the final ratio in trans.

062, Jan 21, 2022

062, Jan 21, 2022

#2
Jan 21, 2022 #3

cgilliland Medium Load Member

321

739

Mar 13, 2017

0

thanks
pretty much only .73 or .85 right

cgilliland, Jan 21, 2022

cgilliland, Jan 21, 2022

#3
Jan 21, 2022 #4

cgilliland Medium Load Member

321

739

Mar 13, 2017

0

i guess i gotta find the model number

cgilliland, Jan 21, 2022

cgilliland, Jan 21, 2022

#4
Jan 21, 2022 #5

Rideandrepair Road Train Member

16,522

53,935

Aug 8, 2015

0

.73

Rideandrepair, Jan 21, 2022

Rideandrepair, Jan 21, 2022

#5
Jan 22, 2022 #6

cgilliland Medium Load Member

321

739

Mar 13, 2017

0

thanks everyone i am sure you are right its 3.73
i want 3.36 i think
lower my rpms 150 at cruise speed

cgilliland, Jan 22, 2022

cgilliland, Jan 22, 2022

#6
Jan 23, 2022 #7

istumped Medium Load Member

468

220

Feb 8, 2015

0

Call the dealer with the vin# ask them what the gear ratio is from factory.

istumped, Jan 23, 2022

istumped, Jan 23, 2022

#7

cgilliland Thanks this.