The "AT" light comes on when starting the car and sometimes the car "jumps" when the gear shifts while driving. Yesterday at the stop light it started in 4th gear.
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2004 Mazda Mazda3 Question: automatic transaxle problem
Answer #1Bret Bodas from RepairPal Test Shop, June 23, 2010, 13:02Master
Sounds like an issue with the transmission. I would get the issue diagnosed by a good repair shop, Dealer or a transmission shop.
Here are some shops in the Belton area: http://repairpal.com/directory?address=76513&car_brand_names=Mazda
Ask that they check for any related technical service bulletins or software updates to the transmission control module.