Rear-end upgrade
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Junior User
Joined: Feb 2004
Posts: 58
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From: Houston Area TX
Rear-end upgrade
I have a 1993 5.0L F150 Supercab with a 3:55 ratio/8.8 inch rearend. I want to install a traction-loc rearend. I have seen plenty of them for sale on e-bay out of mustangs and thunderbirds and they say they will fit ANY 8.8 inch open differential. Can anyone tell me for sure? If I buy the complete unit, is it an easy swap out, or do I need special tools? Will I need to strengthen my driveshaft? Will I have to change outmy spindles also?
Thread Starter
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Junior User
Joined: Feb 2004
Posts: 58
Likes: 0
From: Houston Area TX
These are my axle codes from the tag...
S838B
355 88 3D13
What do these numbers mean besides 3.55:1 ratio and 8.8" diff?
How can I tell the number of splines without tearing it apart?
Can I use the axle housing from a 33 spline and just change out the spindles to a 28 spline as long as it comes from an 8.8?
The number 3088 is stamped on the axle differential?
S838B
355 88 3D13
What do these numbers mean besides 3.55:1 ratio and 8.8" diff?
How can I tell the number of splines without tearing it apart?
Can I use the axle housing from a 33 spline and just change out the spindles to a 28 spline as long as it comes from an 8.8?
The number 3088 is stamped on the axle differential?
Last edited by 93superflare; Feb 28, 2004 at 05:55 PM.
Cargo Master
Joined: Dec 2003
Posts: 2,735
Likes: 38
From: Sunny Florida
I don't know anything about 8.8 rear ends yet but on a 9 inch you can replace the inner splined spider gears from 28 to 31 spline or the other way. Of course you need the correct posi splined pieces as well for where the clutches go. The only thing you can't get away with is a true 28 spline case will have to small of an opening for the 31 spline axle unless you machine it open. Here is the good part though. You can take an open carrier main housing and use it as long as you have the correct carrier posi cove along with the correct posi pieces.
I will some time this year be digging into the 8.8 I have in the yard and see I can do the same things to it. This was just some food for thought.
I will some time this year be digging into the 8.8 I have in the yard and see I can do the same things to it. This was just some food for thought.
