[derikjohnson]

i know this is the wrong place to be asking the question but i need a response fairly quickey so here it goes.. I am looking for a ford 9 inch tommorow morning and was wondering if a detriot locker can be put into a ford 9 inch tracloc (limited slip or "posi") unit or if i needed to find an open unit to do this... also will jacking the car up with it in neutral and spining a tire and having the other one spin in the other direction be a difinate open rear end .. thanks

also the 9 inch i was looking at was outta a 75' Gran Torino.. all i need is the tird member cause i plan on buying an aftermarket housing axles shafts and detroit locker... thanks

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[goody2shoes]

Not sure about the detroit locker going on a posi unit, I have though heard that detroit lockers are not favored for a street vehical.

Jacking up the rear end, if the tires spin opposite directions it means one of 2 things, it is an open rear end or it is a posi unit that is worn out to the point where the clutches aren't grabbing so it is going to basically act like an open rear end unless your replace the clutches and possibly the springs.

[derikjohnson]

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[Odium]

You can put a locker in a 9" but I wouldn't use it on the street as it basically acts as a solid axle, great for drag racing though. If you're getting one tire to burn forward and the other backwards, that's strange. I'd say the posi unit is blown. You also need to make sure that it will fit your car, i.e. spring mounts etc. If you have to replace everything like the carrier, gears, axles that will be quite expensive. Depending on what they want for it, you might only be a few dollars away from just buying a new one.

[Centerline]

Generally speaking, if you spin one tire and the other rotates in the same direction is will be a posi unit. If it rotates in the opposite direction then it's an open rear. As was mentioned earlier there could be a case where a posi is worn out and it doesn't act as described but that will be pretty rare.

A Detroit locker can be put in a 9" (a buddy has one) but as stated earlier they are noisy and although they can be used on the street the traction loc is a better choice for street use.

Centerline