Axle offset question

Reply Subscribe

Thread Tools

Search this Thread

May 21, 2024 | 03:13 PM

BigBlueRanger1977

Thread Starter

Trailering

Joined: Aug 2021

Posts: 15

Likes: 5

Axle offset question

Hi, in the market to buy a rear disc brake upgrade kit for the 1977 F150 Ranger XLT short bed 4x4 we are restoring. Unfortunately the rear axle is disassembled at a shop getting rebuilt right now. I know I have the "Big Ford Old Style) axle flange, but since the axles aren't in I don't have the offset and I need that number. Should be 2.36" but need to confirm. Anyone out there know what the offset was on the 9" rear end at that time? Thanks.

May 21, 2024 | 03:33 PM

tbear853

Hotshot

Joined: Feb 2004

Posts: 10,837

Likes: 2,612

From: The Shenandoah Valley

What is it you mean by "offset"?

May 21, 2024 | 08:24 PM

BigBlueRanger1977

Thread Starter

Trailering

Joined: Aug 2021

Posts: 15

Likes: 5

Distance between the outside of the axle flags to the outside face of the axle once fully inserted. Supposedly 2.36”?

May 21, 2024 | 08:25 PM

BigBlueRanger1977

Thread Starter

Trailering

Joined: Aug 2021

Posts: 15

Likes: 5

Sorry - flange not flag

May 21, 2024 | 08:35 PM

tbear853

Hotshot

Joined: Feb 2004

Posts: 10,837

Likes: 2,612

From: The Shenandoah Valley

I just never seen that called "offset". Somebody will have one apart to check from flange where wheel mounts to housing where brake baking plate mounts. My "guess" is they are all pretty much same if using standard drum brakes.

May 22, 2024 | 05:13 AM

john-9

Cross-Country

Joined: Jun 2016

Posts: 81

Likes: 31

the term for what he is asking is --- axle standout or brake offset -- distance from the outside of the axle flange to the housing flange with the axle installed in the housing ,, early 60's 9 inch Fords had a 2-3/8 inch standout ,,, most later model 9 inch axles used 2-1/2 inch standout ,, most of the disc brake conversions are for the 2-1/2 inch standout