No TCC lockup or 4th gear 4l80e
05-11-2016, 08:28 PM
#1
Teching In
Thread Starter
Join Date: May 2012
Location: upstate SC
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
No TCC lockup or 4th gear 4l80e I swapped my 4l60e to a 80e and since I haven't had TCC lockup or OD. I had the PCM segment swapped for the 80e and done the wiring swap in the harness. However on my snap on scanner I can demand lockup and it will lockup. Also PCM is commanding 4th gear but trans doesn't shift. I have got the brake switch wired up to the TCC signal wire. I appreciate any help on diagnosing this issue or things to check.
01-18-2023, 12:44 PM
#2
Registered User
Join Date: Jan 2023
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
I swapped my 4l60e to a 80e and since I haven't had TCC lockup or OD. I had the PCM segment swapped for the 80e and done the wiring swap in the harness. However on my snap on scanner I can demand lockup and it will lockup. Also PCM is commanding 4th gear but trans doesn't shift. I have got the brake switch wired up to the TCC signal wire. I appreciate any help on diagnosing this issue or things to check.