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Doesn't hurt to change the rear end fluid anyway, so pop the rear cover off. The gear ratio will be stamped into the ring gear. Also by opening it up you can tell it is has a limited slip unit (suregrip) in it. If the ring gear is a 2.71(or higher) you lucked out. All you need to do is go...

First it isn't called a "posi," because Mopar called it a "suregrip." However, its true name is a "limited slip." To answer your question it depends on the type you're looking at. A cone type isn't worth as much as a Clutch type. So which Limited Slip unit are you looking to buy, Clutch or...

Most switch due to the brake setup they want to run required the change.

Interesting information

Before you put any money in that thing, have to sonic/mag tested.

Exactly how wide it is I do not know. But it is a direct bolt in job. Now if you have an a body 8.25 rear go to the junk yard and find a 96 or olde jeep GC and pull the gears and sure grip unit as well as the rear disc brake setup. Then bolt it all to the a body 8.25 rear. Boom now you have an...

8.75 the whole way. However have to though about buying a 70 or earlier b body 8.75?

No. But the 7.25 came in the widths. Sbp is smaller than the bbp.

C clip design, gotta love it.

You can get it from summit or you can go to the junkyard and find a 96 or olde jeep GC and pull both the better gears and sure grip unit plus the rear disc brake setup from it and bolt it directly to your a body 8.25.

Should but remember that there were two different carriers depending on the gear ratios used.

To wide.

Go 8.25 cheaper stronger easier to find plus you can easily add a sure grip/gears and disc brakes from a 96 and older jeep GC.

GM 200R4 all day

Yes and no about the jeep rear end. They still use the a body rearend but get the rear disc, gears and sure grip unit from the jeep rear.

Everything you said is true however the 2.45 ratio uses a different carrier than the 2.91+ ratios.

Yes starting in 73, the a body could get an 8.25 rear if order. A sbp/BBP 7.25 rear was also an option if a slant 6 or front drum brakes were ordered. The 8.25 was the replacement for the 8.75 rear.

You can use the limited slip, gears and rear disc off a 96 and older jeep GC but you'll need an a body 8.25 rear because the jeep rear is too wide for an a body.

Mopar to ya has the 200R4 in a dart sport and has been running for 1-2 years now.

200R4 all day and day. If you have to cut the tranny tunnel (which you don't for the 200R4) why limit yourself to a 4 speed when you can drop in a 6 speed.

Tremec is the tranny used in the corvette, viper, camaro, mustang, challenger, etc. the TR-6060 is the one you'll find in the newer versions of the cars listed.

Gm 200R4.

Simple with a standard dipstick and a deeper pan. You just add more fluid till the dipstick says you are full/proper level. Nothing changes you just gotta add more fluid.

If you're installing a sure grip unit in a 489, install a solid sleeve (instead of/using a crush sleeve).

Call up dr diff and order up a set of axle and b body brakes. Save yourself the headache that will come later.

Nice!

Info I'd like to know as well.

3.55 will be just fine

Eaton tru trac is what you wanna run. That or a clutch type limited slip unit.

Could also be an 8.25 rear.