So I've noticed recently that sometimes I'll go start the car, put her in drive and push the gas the it revs and then catches. Now, I'm now giving much time between shifting into Drive and the initial gas pedal depression, am I just not being patient or is it slipping?

Also while I've got your attention can a 4T65E from a GP GT be replaced with a 4T65E-HD?

Thanks,

Brammer