July 25, 201015 yr 98 GT automatic shifts fine when cold...5 mins after warm up: shifts fine 1st to 2nd...then you have to let off the gas for it to shift into higher gear any ideas what could cause that?
July 25, 201015 yr Start with a fluid flush. Search here and you will see the different ways to do it. Sounds like one of the valves is sticky.
July 26, 201015 yr If you can shift it manually and all the gears work, it is sticky valves. Change the fluid.
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