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Hello,
When I take off in my 91 rs and give it a good amount of gas the rear end pops and feels like it drops. It only does it when I first take off and only if I punch it. Anyone know what this could be?

Mike
 

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Check the transmission mount. Common for them to break from the pressure of the torque arm. Ever get a banging from what sounds like under the shifter? If so then the trans mount is bad.

Bob.
 

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It wouldn't hurt to pull the rear end cover and look over your ring gear and spider gears. If the oil has shiny specs in it you know there is a problem.

When I broke 2-1/2 teeth off the ring gear in my old 84 Camaro a few years ago, it popped when I took off then howled at higher speeds. Not an uncommon problem with 10 bolt 7.5" rear ends.
 

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GM had this problem with early 90 vehicles
Remove the drive shaft and clean and lube the inside of the transmission yolk. They have a special grease to use, I can get you the part number if needed. This should do it.
Good luck
 

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GM had this problem with early 90 vehicles
Remove the drive shaft and clean and lube the inside of the transmission yolk. They have a special grease to use, I can get you the part number if needed. This should do it.
Good luck
 
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