About two weeks ago I posted about a problem that exists on most Gen2 cars. The problem deals with the two bushings that reside in the differential arms. Take a look at picture three or four and you can see the bushings.
The oem bushing consists of a hard rubber outer shell and an inner steel sleeve. The sleeve is a split shell. In the stock form there are two problems: the clearance between the bolt and the split sleeve is excessive; secondly, the split sleeve grows eliptical from the cars torque. The problem gets worst when they perform the frame recall. They use a 14mm bolt, however, the center of the bolt has a reduced diameter (where it contacts the bushing). Since it is loose, continued used only reduces (from banging)the bolt's diameter evern further.
What does this mean, it allows the suspension and the differential assembly to float independent of each other, therefore, not allowing the suspension to do its works. It also gives the differential a running start on the frame when you launch, as with slicks.
How much does it impact the car, that will depend, on my car the amount of float at the bolt was about 7/32", that tranlates into 21/32" of float on the outside of the car. It also means over 1" at the outside rear of the car. In other words your car can float that amount from on-torque to off-torque. On my car the right rear had always been higher than the left side when parked. I could not figure out why. After the bushing replacement the rear is now level.
Here is the picture of the stock bushing and the recall bolt.
The next picture is a modified C5 vette bushing. The bushing had a smaller inner ID and had to be reamed. The offset from front to back was wrong and had to be milled and then shimmed. The bolt also had to be replaced. It started out being simple, however, took a bit of work.
The next shot is a stock viper assembly. I had heard that several cars broke the differential assembly arms and Tony Armour told me about a fix. See the fourth photo for the actual fix and the reinforced arms.
The oem bushing consists of a hard rubber outer shell and an inner steel sleeve. The sleeve is a split shell. In the stock form there are two problems: the clearance between the bolt and the split sleeve is excessive; secondly, the split sleeve grows eliptical from the cars torque. The problem gets worst when they perform the frame recall. They use a 14mm bolt, however, the center of the bolt has a reduced diameter (where it contacts the bushing). Since it is loose, continued used only reduces (from banging)the bolt's diameter evern further.
What does this mean, it allows the suspension and the differential assembly to float independent of each other, therefore, not allowing the suspension to do its works. It also gives the differential a running start on the frame when you launch, as with slicks.
How much does it impact the car, that will depend, on my car the amount of float at the bolt was about 7/32", that tranlates into 21/32" of float on the outside of the car. It also means over 1" at the outside rear of the car. In other words your car can float that amount from on-torque to off-torque. On my car the right rear had always been higher than the left side when parked. I could not figure out why. After the bushing replacement the rear is now level.
Here is the picture of the stock bushing and the recall bolt.
The next picture is a modified C5 vette bushing. The bushing had a smaller inner ID and had to be reamed. The offset from front to back was wrong and had to be milled and then shimmed. The bolt also had to be replaced. It started out being simple, however, took a bit of work.
The next shot is a stock viper assembly. I had heard that several cars broke the differential assembly arms and Tony Armour told me about a fix. See the fourth photo for the actual fix and the reinforced arms.
