lock up switch
 

whats the best lockup switch for my 12v? when pulling my 20k gooseneck no matter how i drive it always shifts at 45 and SMOKES terrible id like for it to shift at 50 or 55 while hauling any ideas?

I had a bd torque lock on my rig until it went out. Now I have two separate switches wired in, one for 3/4, and the other one is the lockup switch.

But why does your rig smoke bad? I'd get that dealt with first.

It doesn't sound like you want a lockup switch, it sounds like you want a switch that will keep it from locking. You have no signature details and I have no idea what you have for a transmission or what's been done to your engine, so I have to assume it's stock. I doubt a stock 12V will pull 20K, but if you're doing it with a stock transmission, this complaint is soon to be the least of your issues.
Regardless, if it insists on locking at 45mph even under that load, it sounds to me like something is out of adjustment with your TPS. Either that, or someone deleted the TPS and the shift is locked at 45 by whatever gizmo is plugged in instead. Or it's a built transmission that can take the lockup under that load, but I'd think if you had a tranny that built you'd know and would have said something about it.
It will smoke more under load when the TC locks, because the rpms are low so it's fueling like crazy to make up for it. The more you have your pump modded for more fuel, the more smoke this is going to make- concurrently, the faster it's going to make the boost to pull you out of it.

You should really fill in your sig so we know what we're dealing with.

Like stated above, you need to fill us in with more info.

But if you're trying to keep out of lock-up until later, you can wire up a lock-up switch, but instead of grounding the wire, add power to it and it will keep it from locking up. Then when you get to 50-55 mph, you can turn the switch off allowing the transmission to lock-up and funtion properly.

and the higher your egts will be while making all that smoke ..... smoke is unburnt fuel and will cause higher cylinder temperature as well ..... tell us your trucks history as we can help better , knowing mods makes for easier diagnosis

Exactly. I'm sure 95% of this story is still waiting to be told, before we can have any clue how to help.

sorry its taking so long to respond but I have 4k gsk DAP 7x10 injectors #5 plate slid all the way forward with a 62/65 s300 turbo and when it locks up a 45 it just rolls out prespool smoke and the turbo wont build any boost until it gets up to about 50 mph then the smoke clears I want to move it where it locks up at 50 instead of 45

and the tranny has a precision triple disk converter and a transgo shift kit with 1 whole drilled

You need to dajust pre-boost smoke screw .. the TC isnt gonna help the fact that your pouring in too much fuel too soon .. Need to dajust your AFC settings to adjust for the smoke issue

The number 5 plate is A little more aggressive than a 10 plate. Plus it's full forward. I would back off the plate some and see If that helps.