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What should I replace on a used 2004 4t56e

Ok, just make sure. I know the transmission pretty well and haven't heard of it being called that before.....should be listed in the manual as a TCC O-ring (seal)
 


l67ss said:
I know the impala will have either 3.05 or 3.29 gears. I thimk fr9 is the 3.29 ratio. Keep in mind youll need to use your original neutral safety switch
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My trans is a 3.05 and so is the salvage yard tranny, also, exact year transmission, thank you for the neutral switch tip.
 
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