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Discussion Starter #1
my wife's terrain wont shift after 30 to 40 mph..a couple times she was able to turn it off and back on and it worked fine, but today no dice...
any ideas ? I have my buddy at a chevy dealer pricing me a trans and a TCM...just to be ready...
 

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That she was able to turn it on/off...
I think this may be an easier repair-- with a new TECHM.... or replacing the solenoid shift discs that tend to tear- and cause shift issues.
(these tend to cause delays in shifting).


I replaced mine on my 2010 for about $107 in parts... and 5 hrs of my time.
I began to notice delays in shifts. especially Park-- to Drive...
up to 3 seconds for it to engage.
 

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any ideas ? I have my buddy at a chevy dealer pricing me a trans and a TCM...just to be ready...
It's nice to think ahead but I would start with the basics.
Check fluid level, when was the fluid changed last, run a scan for trouble codes, etc etc.
Which engine do you have, AWD ?

Let us know what you find.
 
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It is awd
Which engine you have tells us which transmission you have.
Also things like if you have a dipstick to check fluid level.
 

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Discussion Starter #6
So trans guy doesnt think it is the tranny..
Said : And i quote.. Could be control module circuit voltage below threshold
can bus module (obd2) communication bcm?
Saying it looks like some kind of communication error?
 
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