When I first started running the 70T motor I experienced a lot of drag brake as well. Over time it seems to have gotten much less though. I know you put a lot of miles on your car so it should be fairly well broken in my now. One thing I will strongly suggest is following mleemor’s suggestion with the motor spray and Bachman motor lube. Between the elixirs and playing with the gear mesh my motor is SO much better then it was originally....it is like a totally different motor.

Cheers,
Jim