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Old 05-07-2017, 04:11 PM   #3
johnber
grouchy old man
 
Join Date: Oct 2014
Location: Lynden WA
Age: 61
Posts: 986
Vehicle: 89 4X base
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sounds like the cluster shaft has failed. (or input shaft teeth are gone) 4th gear runs strait thru without need of any gears as it is a 1:1 . it jus locks the input shaft up to the main shaft. if all other gears have failed that is what has happened. need anuther trans or rebuild yours.
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89 regular cab, plain as it gets with a z-24 and posi's
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