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Rear end, suspension shake
Rear End Shake
I have a Shelby Cobra with a blown and injected 351 Cleveland, 4 link suspensin, 9" ford Limited slip., coil over aldan shocks The car's rear suspension shakes viloently when backing up, especially if there is a grade. I have to slip the clutch Going foreward- no problem I have done the following: Checked the drive line angle at driveline shop, 4 degreeReplaced all end rod links replaced the clutch resurfaced the fly wheel Replaced the dif. crush seal had the 3rd member checked out of car checked motor mounts checked u joints No one can figure out what the problem is !!!! Help |
Do you have a photo of the rear suspension we can see? Is the rear suspension to Midstates specs? You say the driveline angle was checked at a shop what did they find?
Whos "limited slip" are you using? Was the car run in reverse without a load? (on a lift) What happened then? Driveline phase should remain constant regardless of direction of travel. In your case it isn't. All things being equal my first impression is it has something to do with the rear suspension design and a phase change when the differential is loaded (unloaded) in the opposite direction of the typical, forward load. This could mean the mounting points holding the suspension are changing. This could be why they can't find anything wrong at the shop and why I wonder what it does in reverse on a lift. My second impression could be a weak or broken transmission mount. As you are aware reverse gears are lower than forward gears inducing greater stress and flex, especially up a grade, the greater the grade the greater the load, the greater the flex the greater the vibration. Give us a photo clearly showing the 4 link we'll go from there. |
What kind of linkage to the clutch?
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