Valve Body Question
I have a Bowtie 700r4 in my 2WD. Very solid and works as advertised (even though I had to put a transgo kit in it to make it shift right). The trans locks up in OD automatically (it has a NO switch in the OD valve train) but with a toggle I can bypass the OD valve body switch and lock it up in any gear (including 2nd). Since the converter solenoid is what controls lockup exclusively, anytime the OD VB switch is bypassed the thing will lock the converter (except in 1st). The VB only has a port for a switch in the OD train. I would like to have more control over which gear I can lock/unlock it and also have some protection with a pulse switch so that the converter unlocks as it shifts gears. As it is if I have the manual lockup switch activated and it downshifts from 4th to 3rd it jars the tranny when under load and so I'm afraid of damaging it. Also, the decrease in RPM from 3rd unlocked to OD locked is huge, so being able to run in locked 3rd then unlocking as it shifts into OD locked would make for smoother running on the highway.
I have the VB switches that I need and can figure out the wiring harness. Can I drill and tap ports for these switches in the VB? What would be involved in changing the bushings and valve trains? Or should I look for a VB with these ports already there? If so what would I ask for (e.g., year; model)? Thanks for your ideas. --Randy
2006 GMC 2500HD Duramax Allison Crew