Differential ratios
Thread Starter
|
Senior User
Joined: Mar 2018
Posts: 248
Likes: 1
From: Lindsey Suffolk England
Yes, that's exactly right. I do not know if it is the axle originally fitted when built new. The stamping in the circle you mentioned in your first post....does that apply to the 41 and the 44 axles ?. I will get under tomorrow morning with a torch (sorry...flashlight), and see if I can read the casting text. Either way, I can see why people tell me it is far more cost effective to do an axle swap rather than change diff ratios. BUT I will still get some prices for crown,pinion and carrier. The downfall will be the cost of shipping and taxes to UK. I will let you know what I find tomorrow.
, been under the truck doing some investigating. Here is a photo of the text in the area circled in the earlier post. Above that their are some numbers 18419. Also I marked one wheel with tape and also marked the propshaft UJ and diff casing. Spinning one rear wheel one complete turn makes the propshaft turn just shy of two complete turns. What does that tell us ?.
Cargo Master
Joined: Feb 2006
Posts: 2,320
Likes: 897
From: Lititz PA
With one wheel on the ground and the other jacked up, rotate the wheel 2 revolutions. Count the number of revolutions at the driveshaft. You’ll get about 4 1/4 turns on the driveshaft with a 4.27 rear. I have a 4.27 in mine right now, I do a little drag racing. Dennis
Thread Starter
|
Senior User
Joined: Mar 2018
Posts: 248
Likes: 1
From: Lindsey Suffolk England
With one wheel on the ground and the other jacked up, rotate the wheel 2 revolutions. Count the number of revolutions at the driveshaft. You’ll get about 4 1/4 turns on the driveshaft with a 4.27 rear. I have a 4.27 in mine right now, I do a little drag racing. Dennis
Thread Starter
|
Senior User
Joined: Mar 2018
Posts: 248
Likes: 1
From: Lindsey Suffolk England
Same result with one wheel on ground. Two revolutions of road wheel turns propshaft just shy of four revolutions. So as Blue Oval Rage stated earlier, I guess that makes it a 3.92:1 ratio diff.
Thread
Thread Starter
Forum
Replies
Last Post
dirtsquirter
1961 - 1966 F-100 & Larger F-Series Trucks
11
May 4, 2018 10:21 PM
lavatan
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
7
Jan 6, 2012 11:45 PM
Drac
Clutch, Transmission, Differential, Axle & Transfer Case
4
Dec 15, 2007 10:49 AM
rspurge
1948 - 1956 F1, F100 & Larger F-Series Trucks
3
Jul 30, 2002 04:30 PM
