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Discussion Starter · #1 ·
Hi everyone I'm new to this and I'm hoping you guys can help me answer a question. I just recently bought my 88 7.3liter IDI I'm having issues with my transmission it's is starting to shift really late into second and sometimes not at all when I get my rpms up really high let off peddle a little then she shifts plus not sure if my tachometer is correct. How do I fix this issue.
 

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Ia that still the c-6, or did it change to the E4OD by then? If it's still the c-6 check the vacuum modulator, they used to act just like that.
 

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Discussion Starter · #3 ·
Ok thanks I will take a look at it. Mine has the C6 i also found out it already has a reman transmission. So if I was to get a rebuild kit what should I replace on it if the vacuum modulator is okay
 
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