Ford Truck Enthusiasts Forums
Misc.
Clutch, Transmission, Differential, Axle & Transfer Case
differential gear ratios

differential gear ratios

Reply Subscribe

Search this Thread

Old

Aug 3, 2003 | 06:44 AM

#1

79f150custom

Thread Starter

|

New User

Joined: Aug 2003

Posts: 23

Likes: 0

From: Indianapolis, IN

Question

differential gear ratios

Does anyone know a good way to find out gear ratios without tearing down to count teeth? I bought my truck & previous owner converted NP203 to parttime, however did not bother to match gear ratios.

1979 f-150 custom 4x4
Thanks,
Andy

Reply

Old

Aug 3, 2003 | 10:13 AM

#2

MustangGT221

Post Fiend

Joined: Nov 2001

Posts: 14,947

Likes: 6

From: Topsfield, MA

Club FTE Gold Member

differential gear ratios

Put a chalk mark on the driveshaft next to the axle. Lift the tires off the ground. Rotate the tire once, and count how many times the driveshaft rotates.

Reply

Old

Aug 3, 2003 | 10:24 AM

#3

StrangeRanger

Posting Guru

Joined: Dec 1999

Posts: 1,903

Likes: 2

From: Copley, OH

differential gear ratios

That works with a limited slip. With an open diff lift one wheel off the ground and count the driveshaft turn for 2 turns of the wheel.

Reply

Old

Aug 4, 2003 | 09:58 PM

#4

79f150custom

Thread Starter

|

New User

Joined: Aug 2003

Posts: 23

Likes: 0

From: Indianapolis, IN

Talking

differential gear ratios

Thanks o you both! May have saved me alot of unneeded work.

Andy

Reply

Reply Subscribe

Related Topics

Thread

Thread Starter

Forum

Replies

Last Post

Changing my gear ratio?

wildcard221

1973 - 1979 F-100 & Larger F-Series Trucks

7

Feb 15, 2017 06:23 PM

Brian429

2015 - 2020 F150

2

Nov 23, 2016 11:51 AM

voadrummer

3.8 & 4.2L V6

2

May 10, 2015 05:21 PM

Low range gear ratio?

FordGuy0131

1999 - 2016 Super Duty

4

Jan 24, 2008 01:00 PM

Featherman

1973 - 1979 F-100 & Larger F-Series Trucks

22

May 2, 2007 07:44 AM

Reply Share

First
Prev
1 / 1
Next
Last

All times are GMT -5. The time now is 12:59 AM.