On my 1998 s10 (4l60e/4.3) I have been using it with a switch hooked up to the tcc so that I can lock it manually. It has been this way for a while and has been working great.
I tried hooking the same style switch to manually lock the tcc in my 1999 k2500 (4l80e/5.7) and it worked in 3rd gear, but OD would slip - like the gear was nearly non-existent. It did this whether locked or not. When I remove the switch, OD works normally (and is strong) again.
Both trucks have Blackbear tunes, with the k2500 tune shifting at high rpms (I asked them to do this) for towing.
Transmission smart people - any ideas why the difference between the two trucks?
I tried hooking the same style switch to manually lock the tcc in my 1999 k2500 (4l80e/5.7) and it worked in 3rd gear, but OD would slip - like the gear was nearly non-existent. It did this whether locked or not. When I remove the switch, OD works normally (and is strong) again.
Both trucks have Blackbear tunes, with the k2500 tune shifting at high rpms (I asked them to do this) for towing.
Transmission smart people - any ideas why the difference between the two trucks?