I have a 92 RS so it came with an open rear.I was wanting to know how hard it is to change to a limited slip.It looks easy but is it?Thanks.

 

From what I understand it involves rebuilding the entire rearend. Removing C clips, axles, etc. That's why everyone wants a 9 inch Ford. All you have to do is change the entire assembly and go.


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'87 Bird 350 .060 over 700R4 + Lots more

 

Changing out the entire rear axle unit is fairly easy.

Changing the carrier from open to limited slip is rather involved, requires special tools, and should probably only be done by someone who has been trained in the proper way of doing it.

Installing a PowerTrax conversion unit is a good way to go if you are happy with the gear ratio you have now. Can be installed with common hand tools, is about the same price as a posi carrier but no professional labor costs. It will make a clicking sound going around corners, but if your exhaust is loud enough or your stereo powerful enough, you won't notice it.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

Changing the carrrier is not that involved. Aside from the diff cover, all you need to remove are a 4 bolts and the carrier comes right out. Its a whole lot easier than a gear swap or complete rebuild because you don't have to touch the pinion. If you do decide to do it, take not of the backlash and foot print of the gears, swap in the new carrier (remember the ring gear bolts are left hand thread!!!!) and preload the carrier (i can't remember the amount) Buy a differential rebuild book, that tells you all you need. Its a lot less scary than you actually think, just remember to take your time and double check all dimensions.

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• 89 Formula 305 WS6
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