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Discussion Starter #1
I have a 1996 GMC Jimmy and everytime the truck is in 3rd gear (somewhere around 40-50mph) the truck seems to have hesitation or a sputtering feeling. When I accelerate up to 55-60mph that hesitation is no longer there. What could be causing this? The truck has 240,000 miles on but still runs really good and has a lot of power.
 

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When was the last time you had the transmission fluid changed? Also, is this the original trans and if so has it been rebuilt?
 

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Discussion Starter #3
It is the original transmission. Also, it has been quite a while since I have had the transmission fluid changed.
 

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Try having the transmission flushed and changing the fluid and see if that alleviates the issue.
 
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