Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
I am sorry your having this problem
this is RWD correct ?
and when it will do this grinding noise it will in drive in 1st gear ? will it move in 1st gear or just grind ?
if it only makes this noise when driving in the D range this can not be a flex plate issue as it would do it in any gear and make that noise
the problem here is going to be an internal failure of possibly the one way sprag or reaction carrier or possibly the planetary gear set
100 % with this type of noise only in the D range there is an internal failure and the transmission needs to come out and apart to see which has failed causing this noise i am sorry to say
it would not just make this noise in drive only if it was a starter or flex plate issue it would make the noise in all the forward gears