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Old 03-09-2005, 09:11 PM
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9 inch question

I have a ford 9 inch from a 70 bronco that i am going to put into a 72 nova. It currently has an open 3.55 ratio chuck in it and i have an extra 3.70 ratio that is also open that i am going to put into it. I was wondering what I could use in the rearend for a posi/locker. I have heard that lockers arent good for street use.I was wondering if a posi or locker can be put into and open 9 inch chuck. The only lockers I have found for a 9 inch are the powertrax unit and the detroit locker. Would either of these be good for the street? Does anyone know of a posi that I could buy for a 9 inch? What was the traction-lock 9 inch, a posi or locker? Any help is on this greatly appreciated. Thanks

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Old 03-09-2005, 09:24 PM
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The powertrax seems to be a decent unit. I prefer the Detroit locker myself but a lot of people don't like the clicking it makes when you turn...and yes you can run either on the street.
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Old 03-09-2005, 09:39 PM
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do a search on this board for ford 9 inch or .....

do a google.com search for Ford 9 inch posi.... you will find a ton of web sites to read and find parts with prices
Dont worry how old you are... it is the mileage on your body that adds up.
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Old 03-11-2005, 11:41 AM
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The current detroit lockers, the SofLok, is more street friendly and quieter. Still some clicking going on but to some gear heads it's music...my wife-mate used to think a cammed motor sounded disastrous at a stop light until I straightened her out, now she just smiles and gets out the checkbook.
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Old 03-11-2005, 11:52 AM
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I have a detroit locker with my Ford 9". Has more or a click noise to it when going around corners. I'm using some pretty thick gear oil which helps with the noise level. So far I love it to death, I'll never go back to a clutch pack style. It's all mechanical so no clutches to wear out. The original ford units with clutches dont last long with my lead foot.

Everyone who ride's in my car asks what that noise is, I tell them I only have 1 lug nut holding the tires on
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Old 03-11-2005, 12:17 PM
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Originally Posted by 19nova72
I have a ford 9 inch from a 70 bronco that i am going to put into a 72 nova.

I bought a 69 Nova SS new..........

A Bronco is a good width for the Nova but not really a good donor rear end. The Bronco, being a 4 wheel drive, has the pinion offset a good bit. I believe the drive shaft will hit the floor pan. Also.........all early Broncos are 28 spline. All early Broncos are the 5 on 5 and 1/2 inch bolt pattern on the wheels ( Ford pickup pattern)

A much better choice would be a 57 to 59 Ford. Same good width but has larger brakes and the standard Ford car wheel pattern.

I run a Detroit Locker in my 32 Ford roadster. It is a little noisy .......but I have never broke it.....and it works great.

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Old 03-12-2005, 03:10 PM
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if you look at jeg's site in the ring and pinion sec. you'll find the power trax no slip traction system.its like a posi with no slip.fits open and posi units and cost about $400.00 similar to locker with less noise.
then go to the pick-up sec. and again you will find nearly the same thing for less money called an automatic positive locking diff..200.00-400.00 depending on your application.both can be installed in a day or less.
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Old 03-12-2005, 03:15 PM
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I bought a complete center section from Moser. They recommend not using synthetic gear lube. It makes the locker noisier.
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