i'm trying to figure out the rearend ratio on a D150 2x4 8 1/2 inch differential
Legend
Joined: Jun 2009
Posts: 8,025
Likes: 72
From: orangeville ontario
35 might be 3.55 gears but best way to tell is to either pull the over and change the fluid or hooking up a tach. if you got 3.21 gears the engine will run at about 2000rpm at 50mph or 2000rpm at 45mph with an automatic slush box. if the truck is a standard it most likely has 3.21 gears. stardard trucks are always geared like that.
Record Breaker
Joined: Apr 2013
Posts: 1,815
Likes: 56
From: Alberta
-you could remove the pan cover and count the crown and pinion teeth
-you could raise the rear end, spin the tires 1 revolution and count the turns of the driveshaft
-dealer build sheet; call the parts dept and provide your vin. Call fca corporate and they can email you a build sheet.
-try the vin decoder in the tools section
-you could raise the rear end, spin the tires 1 revolution and count the turns of the driveshaft
-dealer build sheet; call the parts dept and provide your vin. Call fca corporate and they can email you a build sheet.
-try the vin decoder in the tools section
Last edited by primem; Dec 31, 2017 at 01:27 AM.
