rear axle swap and pinion angle

79 mustang. took out the little rearend and put in a 8.5 rear end and now the pinion in pointing way to far down...

Any suggestions
thanks

Get some wedge shims for the perches on the springs.

Dave, a '79 isn't a leaf spring deal. I'd think adjustable control arms or relocating the brackets would be the ticket.

The rear suspension in trailing arms and coil springs ... the rearend that is in the car now is a 94 gt mustang...

Pinion angle is pionting downward....

You went too new, the 94 chasis change moved the mounting points, SN95 chasis versus FOX. Adjustable uppers to roll the pinion back up.

kim wrote:You went too new, the 94 chasis change moved the mounting points, SN95 chasis versus FOX. Adjustable uppers to roll the pinion back up.

The mounting points should be the same. The rear axle assembly got wider in 94 although the axle housing was the same. In 99 the housing and the axle assembly got wider.


To the OP, adjustable upper will probably get the pinion angle where you need it. Get the sperical bearing stuff, the poly stuff will bind up.
Jess

fwiw I like the spherical on one end, poly on the other. with both ends spherical it seemed the body rocked side to side. but then I am not normal anyway. bobn

found out last nite that the rearend is out of a 90 gt.... does that make a difference

Should bolt right in and be exactly as ford intended it to then.

maverick wrote:Dave, a '79 isn't a leaf spring deal. I'd think adjustable control arms or relocating the brackets would be the ticket.

I misread that I though he had a mustang II....

racinghabbit wrote:found out last nite that the rearend is out of a 90 gt.... does that make a difference

What arms are you using?

79 upper arms and 90 lowers

Factory uppers and lowers?

How far down is the pinion?

You will need some aftermarket arms to adjust the pinion angle. Most people go with adjustable uppers.

Jess