should i replace my rear end s spring with a f150 sping?

fordracer666

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hey guys i just currently replaced my clutches in my rear end. i was getting a random 1 wheel peel at the track . so i read somewhere people where replacing the s spring in the rear end with the f150 spring it supposed to be heavier duty ? should i replace it with one or just put the stock one back in?
i want to order tonight . so i hope someone will chime in .

thanks in advance!!
 

droptop07

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F-150 spring works good. I use to do that on all my foxbodies. If I ever go into this rear will add one also. For the price, works good.
 

klaw

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man i hate installing those...lol.is there a secret?

Squeeze it together in a bench vise then use a couple worm gear style hose clamps to hold it together. Slide/tap it into place and cut the hose clamps off with tin snips as you go. For the cost of a couple hose clamps you'll save alot of time and aggravation.
 

19COBRA93

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These rearends (05-up) already have the heavy duty spring. Fox's and SN's don't.

I'd just rebuild your clutch pack if I were you. It's inexpensive and works. You can go with the carbon fiber clutches that the cobras have that work better. They're just a little more money.
 

19COBRA93

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Squeeze it together in a bench vise then use a couple worm gear style hose clamps to hold it together. Slide/tap it into place and cut the hose clamps off with tin snips as you go. For the cost of a couple hose clamps you'll save alot of time and aggravation.

There is a MUCH simpler/easier way to do it.

Grab the spring in the middle of the "S" with a large pair of pliers. Hold the spring in place and while pushing with the pliers, smack the back of the head of the pliers with a large mallet or dead blow. It may take a couple hits, but it'll pop right in. That's it.
 

stretch

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There is a MUCH simpler/easier way to do it.

Grab the spring in the middle of the "S" with a large pair of pliers. Hold the spring in place and while pushing with the pliers, smack the back of the head of the pliers with a large mallet or dead blow. It may take a couple hits, but it'll pop right in. That's it.
ive done it that way and had it shoot across the shop. lol
 

Mustang30212

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I just pinch it with my fingers and slide it in there...oh wait...we're talking about the S spring still aren't we? lol

RH
 

19COBRA93

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These rearends (05-up) already have the heavy duty spring. Fox's and SN's don't.



can anyone else confirm this?

It's Ford part number F3TZ-4214-A. This spring is used in all F-series, Bronco, Explorer, Ranger, 01-04 Cobra, and 05-current Mustang rearends with the 31 spline axles and 8.8 ring gear.

The older spring is part number EOAZ-4214-A. This was used in all 28 spline limited slip rears.

This is fact.
 

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