Extreme engine vibration (especially while in reverse)

Discussion in '94-95 Tech' started by 22catch22, Oct 6, 2009.

  1. 22catch22 New Member

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    Just finished putting a remanufactured engine in my stang. Everything runs great except this vibration. The vibration isn't too bad until the car is put into reverse. The minute I shift into drive or neutral, the vibration minimizes. I have no idea what it could be. The engine mounts
    and the transmission mounts were replaced during the motor swap. I also put in a new vibration damper. I've rechecked all of the bolts numerous times. I took it to a transmission specialist to ensure that the torque converter wasn't loose. Any ideas??
  2. Chythar Active Member

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    Sounds like the engine isn't balance right to me. the 94-95 5.0's use a 50oz vibration dampener and a 50oz flywheel/flexplate. The old weight was 28oz. To mix those parts is a very bad thing.
  3. 22catch22 New Member

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    I was informed of this weight difference while doing the swap, so I made sure that the new engine was balanced at the same weight as the old engine. Thanks for the reply.
  4. 94 Black GT Member

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    could it be a driveshaft problem? i had a strange vibration and come to find out the rear d/s bolts were loose..thank god i didnt catapult myself..just a thought
  5. 302GTS If you need herpes, I'm your man!

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    Had the same problem with my 95 - I didn't tighten the d/s bolts enough last time I had it out. Luckily I fixed the problem right after noticing the vibration.

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