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Author Topic: posi 3.55 or 4.11 for a 6.75 rear.  (Read 2868 times)

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Offline americanpintobean

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posi 3.55 or 4.11 for a 6.75 rear.
« on: September 01, 2011, 06:32:56 PM »
Can anyone help me out with this?  I am looking for a posi for the 6.75 with 3.55 or 4.11 ratio.   I just need the gearing to put in the one I have, which is non locking 3.08 ratio in a 6.75.

Offline don33

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Re: posi 3.55 or 4.11 for a 6.75 rear.
« Reply #1 on: September 04, 2011, 06:44:57 PM »
I don't know for sure, but I think you will have a hard time finding anything other than stock gears for the 6.75 as there is no practical reason to do any kind of performance rebuild to such a small weak rear.

Offline 72pair

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Re: posi 3.55 or 4.11 for a 6.75 rear.
« Reply #2 on: September 04, 2011, 07:26:14 PM »
The 6.75 traction lock was only offered, I believe, as a dealer installed option on the mustangii. Read an article about it in CarCraft years ago. Hence, I doubt too many are out there.  They do pop up though as I happen to have an NOS one. I also ran across a set of NOS Schieffer 3.70 gears. I haven't seen any 4.11s since Midwest Auto advertised them back in the early 80s. Good luck with your search. JT
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Offline dave1987

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Re: posi 3.55 or 4.11 for a 6.75 rear.
« Reply #3 on: September 04, 2011, 08:01:53 PM »
There was a traction lock 6.75 carrier on ebay last year or early this year (I can't remember), but it was going for about $700.
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Offline americanpintobean

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Re: posi 3.55 or 4.11 for a 6.75 rear.
« Reply #4 on: September 05, 2011, 06:21:13 PM »
72pair, could you get me more infor on what you wrote?  PM me.

Offline americanpintobean

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Re: posi 3.55 or 4.11 for a 6.75 rear.
« Reply #5 on: September 09, 2011, 07:46:57 PM »
bump

Offline 72pair

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Re: posi 3.55 or 4.11 for a 6.75 rear.
« Reply #6 on: September 10, 2011, 01:46:19 AM »
Been a little busy this week. Will try to dig out that article this weekend. Like Dave said: you want these kind of parts...be prepared to bump off some major cash! bump!
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Offline americanpintobean

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Re: posi 3.55 or 4.11 for a 6.75 rear.
« Reply #7 on: September 20, 2011, 07:21:10 PM »
thanks, any help would be great.

Offline 71pintoracer

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Re: posi 3.55 or 4.11 for a 6.75 rear.
« Reply #8 on: September 22, 2011, 08:02:29 PM »
Just wondering what you are going to use it for? I mean does it need to be streetable? The 3:55 gears are not that hard to find and I welded the spiders and used these rears because of the light weight in my dirt cars, I broke an axle here and there but never a rear.
If you don't have time to do it right, when will you have time to do it over?