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Message: [QUOTE="Short Bus, post: 1424366, member: 95"] we put a used zf5 into a customers truck. we couldnt find a transmission with the exact same model, but we got one that had a similar production date and out of a 7.3. The only thing ive been able to determine being different is teh low gear ratio... It works as it should in 1-5, but about half the time you try and go into reverse it goes in about half way and grinds. The other half of the time it drops right into reverse as it should. What should i be looking for or should i dump the trans and find another? I can see anything wrong in the shift tower and just dont know why it would only have problems going into reverse about half the time. any ideas [/QUOTE]

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