Rear end ?
Posting Guru
Joined: Jan 2009
Posts: 1,955
Likes: 2
From: Wyoming
Gearsm gears and more gears!
Dave on here just answered this question for me a few days ago.. Here you go:
Bottom line on the tag will start with .10, .73, or .55 if it is an open axle.
Bottom line will start with L10, L73 or L55 if it is limited slip.
The 10 number will be a 4.10 ratio axle
The 73 number will be a 3.73 ratio axle
The 55 number will be a 3.55 ratio axle
The next three numbers, either 10 2 or 10 5 will indicate 10.25" ring gear or 10.5" ring gear.
All trucks 97 and before should be 10.25" ring gear with 6.5" x 8 bolt pattern on the hubs.
99 and newer trucks should have the 10.5" ring gear with 170 mm x 8 bolt pattern on the hubs.
The ring gear and pinion should be interchangable, but pay attention to the pinion shaft length.
There were two styles, long and short shaft, if they are different you need to swap the yoke as well.
Bottom line on the tag will start with .10, .73, or .55 if it is an open axle.
Bottom line will start with L10, L73 or L55 if it is limited slip.
The 10 number will be a 4.10 ratio axle
The 73 number will be a 3.73 ratio axle
The 55 number will be a 3.55 ratio axle
The next three numbers, either 10 2 or 10 5 will indicate 10.25" ring gear or 10.5" ring gear.
All trucks 97 and before should be 10.25" ring gear with 6.5" x 8 bolt pattern on the hubs.
99 and newer trucks should have the 10.5" ring gear with 170 mm x 8 bolt pattern on the hubs.
The ring gear and pinion should be interchangable, but pay attention to the pinion shaft length.
There were two styles, long and short shaft, if they are different you need to swap the yoke as well.
Thread
Thread Starter
Forum
Replies
Last Post
JimG1098
1948 - 1956 F1, F100 & Larger F-Series Trucks
7
Feb 28, 2010 04:35 PM
