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trying to identify overdrive transmission

662 views 2 replies 3 participants last post by  zacharyh687 
#1 ·
I've got an '83 half ton with a 305 and an overdrive auto. The trans has been slipping, and now reverse is totally out. I thought the 700R4 was the only overdrive auto these trucks had, but my gear indicator reads P R N D 3 2 1 . Every other 700R4 I've seen reads P R N OD D 2 1 . Does anyone know what transmission I have?
 
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