Rear end setup?

Djstorm100

Member
Aug 5, 2007
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I have a fully bulit rear end. And I'm restoring my mustang as well (fox 91) I have lakewood uppers and lower control arms. My questions are this

What torque box are the best? When I say bes,. I mean best overall fitment, thicker metal. I've found upper and lower for 169 (wild race car brand)

I called maximum Motorsports about the upper control arms they said to use ford stock arms with ford stock bushing on each side. So you don't damange the torque boxes. I feel like the axle will have greater wheel hop/flex with this combo vs going with the bushing of aftermarket upper arms and bushing. They said that reinforcing the tq boxes will only make them last a little longer but they will eventually get damaged.


Shed some light ?
 
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If you keep stock uppers but box them, you'll have better arms, reduce flex/wheel hop, and not do as much(if any) damage to your torque boxes.

And it all kind of depends on the use of the car. Street/strip i would get the boxes. If it's just a fun cruiser, then don't worry about it.
 
Mm motor sports has there own way of thinking on the upper control arms. And the reason why is the upper boxes are weaker than the lower so they tell you to run the stock rubber and arms so they flex but that defeats the purpose of getting the lowers because they will be solid but the uppers will flex every where. so you have a lot of twist hop and windup in the rear not to mention the pinion angle will change. mm motorsports also tells you to run the pan hard rod which will elimiate a lot of side to side, hop and twist and much of the axle windup. the most effective rear end setup with keeping the stock design is get new better lowers and adjustable upper with the solid end bushing on the car and put the stock rubber in the axle. So you get a little bit of cussion and put the reinforcments in the boxes. I personally will be running the steeda alumin 400hp+ lowers and a good set of adjustablle uppers. flipped quads and so good reinforcements. Built up rear and a astro t5. The weakes piont will be the tranny and driveshaft.
 
wicked84gt350 said:
the most effective rear end setup with keeping the stock design is get new better lowers and adjustable upper with the solid end bushing on the car and put the stock rubber in the axle. So you get a little bit of cussion and put the reinforcments in the boxes. I personally will be running the steeda alumin 400hp+ lowers and a good set of adjustablle uppers.

This is exactly what I did. It made an incredible difference.