my 91 z-28 has a slight "clunk" while it shifts into 3 gear, the thing is, it doesn't do it all the time. I've tried on different types of roads uphill,smooth,bumpy. I just changed the u-joints hopeing it was the problem, but it wasn't. any info will help

Tranny mount is shot.


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'88 Camaro RS 2.8L
'88 Formula 350 (Too many mods to list...)