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Rearend Help Needed

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Old Oct 24, 2004 | 10:05 AM
  #1  
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Rearend Help Needed

I have a '00 F-150 5.4l 4X4 and it seems that only the right rear wheel is turning when I accelerate. Just a little bump on the pedal and the tire breaks loose. In the rain it is difficult to go around corners without the rearend washing out on me. My question is there an aftermarket product out there that will provide power to both wheels? I remember reading something about a simple bolt in that acted like a posi, does anyone have any ideas or suggestions? The Axel code is: S918F 355 975 9M07

Thanks, John
 
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Old Oct 24, 2004 | 09:37 PM
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From: Heart of Dixie
Check the label in your door and look at the axle code. If it ends in 9 its a limited slip. If it ends in anything else its an open differential
 
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Old Oct 25, 2004 | 09:52 PM
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From: South Kitsap County, WA
From your tag info, John, you have a 3.55 geared, 9.75 inch open rear end. The door code should be a 19. If it was a limited slip it would have an H9 code. The letter before the number is what designates the limited slip, not a "9." An "L" between the 3 and 55 in your tag info would also indicate a factory installed limited slip unit.

Many manufacturers make limited slip/ locker upgrades, but they are more than a simple bolt on. Try an internet search under Ford 9.75 locker, and you'll get a few hits. Hopefully this will get you started.

-Kerry
 
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Old Oct 26, 2004 | 07:20 AM
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Thanks Kerry
 
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Old Oct 26, 2004 | 05:48 PM
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You can also find boat loads of Ford 9.75 LS units on ebay for super cheap.
 
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Old Oct 27, 2004 | 06:54 PM
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Hadn't thought of Ebay. Good call Super.

-Kerry
 
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Old Oct 27, 2004 | 09:30 PM
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Originally Posted by kspilkinton
Hadn't thought of Ebay. Good call Super.

-Kerry
Yeah, ebay is great if you know what to look for and how much you should spend.

I paid 40 bucks plus shipping for a complete low milage 3.55 ring pinion, Track lock, c-clips, driveshaft flange, and spacers.

Stripped off the gear set and made the 40 back, and then sold my open diff and made 40 bucks more!
 
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