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4L80E Sticks in second when cold

1070 Views 3 Replies 3 Participants Last post by  bmodracer, 
bmodracer
4L80E Sticks in second when cold...need help

1995 6.5 turbo diesel 4X4 126k

Occasionally when its cold outside the transmission will not shift from second to third. I have found out that if I shut it off and turn it back on it will shift fine. When running a diognstic I get codes 85 & 87. One thing is that I do not get the #12 code. This has been going on for over a year. Any help would be great!!!
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bmodracer
I'll check the B solenoid (2-3) and replace if necessary and while at it change the fluid and filter.

Thanks!!
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