Quote:
Originally Posted by e91Owner
Not sure what having your transmission checked means, but the absence of codes doesn't necessarily mean it's not your transmission slipping. Over time the friction modifiers in the transmission fluid tend to degrade away and changing the fluid will result in smoother acceleration.
You can always add shudder fix if you don't want to change the fluid just to see if the cause is degraded fluid.
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+1
I changed my fluid at 40k miles with Valvoline MaxLife in my GM 6L45, and the shifting improved a ton. Before that it would hesitate, have jerky shifts, etc.
How many miles on the car? I would try a fluid change first.
Also, coils and plugs can cause slight misfires before failing completely and throwing a code.