93 f350 7.3 idi non turbo transmission

aliaga1

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Jan 2, 2022
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York, PA
Transmission won't shift out of 1st gear until you drive it quarter mile, then shifts smooth.
Only does it when the transmission is cold.
When you first start truck and put in drive with brake and let the tranny warm up with it in drive
It does shifts fine. Any thoughts of what maybe going on? Thanks in advance.
 
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