hard shift = limp or re-learn

[cdbright]

once in a while when i get on my truck hard out of the hole (leaving a light) after driving it easy for a few days it will shift real hard from 1st to 2nd, is this a limp or the tranny attempting to relearn the shift points due to different driving characteristics.

Basically i am not sure if you guys are calling a limp a hard shift or a slight slip when grabbing a new gear

sorry for the stupid question

 

[cdbright]

this was a question,

any opinions welcome

 

[JMDuramaxLB7]

More than likely a relearn. How long ago was your last fuel filter change? This will make a big difference on the tranny shifts also. Usually when it limps it will lock in 3rd gear until you shut the engine off and let it reset.

 

[Mike L.]

Limp mode is when the TCM shuts off and you are left with 3rd and reverse.

 

[cdbright]

thanks guys

 

[cdbright]

i will change my fuel filter as well