i got a 1989 camaro with a 327 bolted to a 700r4. my problem is only in reverse with light throttle. i get a vibration noise and hard vibration/shutter. im not sure whats going on this only started after i pulled my old motor out. and put the 327 in it which i did rebuild my 327. i dont get no shutter/vibration at all in drive or hard throttle in drive.any help would be appreciated.

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