8.8 rear questions?

[cccccc]

i wanted to know if any stock 8.8 rear out of a 87-93 mustang with a 5.0, lx or gt model came with a traction-loc differential? did the 8.8 lock both wheels like the svo 7.5 rear? will the 8.8 have posi like the svo 7.5? did they have like the same differential?

[Eyelawdoc]

The GT Mustangs generally all came with the Trac-loc. With respect to LX 5.0's I can't say. Both 8.8 and 7.5 trac-locs work the same. The 7.5 and the 8.8 are not the same differential, but the 28 spline SVO axles and rear disc brakes work with both.

[Mustang Matt]

All 8.8 in Mustangs had the traction loc. The gears were only a 2.73 in the manuals and the 3.08 in the automatic unless you chose the no price 3.08 option in your manual on the order blank. All of the LX and GT 5.0 cars had the 8.8 traction loc. It was available from 86 on. If you are after the 8.8 dont forget the gearing that you will need to keep the turbo in the RPM range you are used to with your 3.45 or 3.73 in the 7.5 you are currently running. The 2.73 or 3.08 rear gears could be a very disappointing swap.

[cccccc]

yeah i found a 8.8 from a 90 gt and its got 3.55 ratio gears in it and fully rebuilt for $100, but i am taking them out for 3.73's that i got

[Eyelawdoc]

Sounds like you got a nice deal there on the 8.8! Let us know how your swap works out.

[Ken Potter]

Just sold an 8.8 out of a 89 LX 5.0 5 spd for $50.

[frankiesaysrelax]

If I am not mistaken you can simply use your existing axles and brakes with the mustang 8.8 housing, diff, and gears. You may already know this, but I thought I'd mention it.

[KevinK]

Any of the 7.5s that came in a 5.0 or turbo 84-86 car was a trac-loc. The open rears had number code and the trac-loc had a letter code for the gear ratio.

[KevinK]

Here's question for you. Did the 8.8 housing come painted black? Not like the 7.5 which seemed to be natural or rust.

[Eyelawdoc]

The 8.8 sitting on my garage floor out of a low mileage 89 LX 5.0 is painted black from the factory. So is the 8.8 in my 84 Ford pickup, the one in my 88 Mark VII LSC and the one in my 86 GT Vert parts car. I don't know about all of them, however.

[frankiesaysrelax]

AFAIK all natural/rust just like the 7.5s. All the ones I recall seeing anyway, though none of them were low mileage.

[cccccc]

will i have to modify any of the brake lines or brake proportioning valve?

[Philc]

has anyone looked at the rears from the '87-'88 turbo coupes? they have 3.55 and 3.73 gears allready in them! (would save a LOT of cash and time)