Alright i would appreciated if you guys could help me out and tell me what you think.

The t/a just got another trany and after being installed the car now acts up. Not sure if its the Tranny or what. When I put it In drive from park it sometimes, not often turns off because rpms drop below 400. When i shift from Reverse to Drive the car sometimes goes hard, to the point where is shirps the tires. from neutral to Drive tehcar shift good, but when i put it back in neutral teh cars rpms surge up to about 1500rpms and drops back down.
Another thing is that in Drive the car it idels at around 600rpms, so it not enought for the car to go on its on fast, but sometimes even at 600rpms the car moves without pressing the gfas as if it was at higher RPMs

The car shift perfectly when moving, upshift downshift everything. This happens ramdomly, but fairly often.

Do you guys think it could be the tranny, a sensor, or what?

thanks

 

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