2007 Mazda 3 TCM hard shifting on this car, I can see on dash board shift light changes after starting speeding forward on (D), it cycles for a few minutes, then sits at (DM), driven at high RPM about 3000 to reach about 50-55 MPH after run for about 30 minutes stop and then go again shifting goes back to normal, (sometimes) it seem like something warm up and make it operate normal.
The service takes 7-10 business days and the cost is $269.99 plus shipping. You can click the link below to begin your order:
https://www.upfix.com/product/tcm-mazda-3-2006-2014-transmission-control-module-repair-tcm-tcu/
Thank you!