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I have a LT1 in my blazer with the automatic 4L60e. It goes into all gears fine. I go forward and it shifts fine. Also it doesn;t make any bad noises or anything. When I put it in reverse it goes into gear but will not move. On a side note when I shift into reverse my backup lights don;t come on. The only time they come on is right before it drops into reverse. Kinda have to slowly shift into reverse and you can see them come for a second then clunk into gear and they go off. Just wondering if they are related problems.

Thanks for any guidance.
 

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PCMPOWERTUNES
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1,176 Posts
If it is a newer ( 96 up ) 4l60e you probably took out the reverse reaction sun gear shell , and if thats the case look out for the rest of the unit too cause it sends metal in the valve body and plugs up the variable force motor and start to burn the 2-3 clutch pack. check your fluid for contamination !!!
 
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