I don't think it's very bad for the transmission. I turn O/D off in my car on the highway occasionally and it's makes sort of a 'clunk' type of feeling. I just think this is because the tranny is downshifting out of O/D and into third. Check the owner's manual though it will say whether it is hard on the tranny or not.
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'97 Laser Red GT Coupe
Stock 2V (Pulled Silencer)
4R70W Automatic
Ripped off a BLISTERING 15.37@90MPH
With a 2.21 60ft
Just Installed- K&N Air Filter
Coming Soon......
-4.10's
-Flowmaster A/T or Magnapack Cat-Back
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