What am I looking at here?

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jasonreichle

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Looking at buying a 6.5 with a 4l80e. Guy says transmission issues. Says it hunts for gears when you get on the throttle, once your on the highway it locks into Od and cruises perfectly. Truck has a heath tune on it running 15 psi. Fluids clean and always serviced on time. Year is a 98. Truck is an amazing deal otherwise if I gotta throw in a trans I’m not to worried. To me it sounds electrical. TCC solenoid? TPS? Thoughts
 

RDF1

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Hunts for gears could be a tune issue. Or TPS issue telling PCM false info so its shifting at the wrong time.
 

smdk2500

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When it is
awesome. Now to see if I can pull any codes
when it is hunting for a gear does the service throttle soon light come on? Also if you have a scan tool you can check the voltage reading by depressing the pedal and watch the voltage reading.
 
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