Strange one I posted recently about not getting lock up when I should, put it down to the quad. I changed the tune slightly that journey TC locked perfect throughout. Next day truck was same as before not locking up at all at times. Fitted a mystery switch. TC will only lock up if I flick the switch and back off the throttle once locked it holds perfectly. To unlock I flick the switch off and have to release the throttle again? Anyone shed any light into this? Oh and the TC will lock on under acceleration if the switch is on and at WOT... I've checked the switch circuit tested good and checked down to pin 7 on the trans. When I rebuilt this box I didn't change the wiring or solenoids so I have ordered these to change as they are original. I done the GM solenoid upgrade that DNJ sell, shift kit, firepunk stage 2 internals with a triple disc. This issue really only started when the quad was installed but it seems even with the box on 0 I still have an issue. What inputs are needed to lock the converter ? Speed sensor or anything like that? 

On 5/4/2019 at 12:35 PM, Ronniemx3 said:

Strange one I posted recently about not getting lock up when I should, put it down to the quad. I changed the tune slightly that journey TC locked perfect throughout. Next day truck was same as before not locking up at all at times. Fitted a mystery switch. TC will only lock up if I flick the switch and back off the throttle once locked it holds perfectly. To unlock I flick the switch off and have to release the throttle again? Anyone shed any light into this? Oh and the TC will lock on under acceleration if the switch is on and at WOT... I've checked the switch circuit tested good and checked down to pin 7 on the trans. When I rebuilt this box I didn't change the wiring or solenoids so I have ordered these to change as they are original. I done the GM solenoid upgrade that DNJ sell, shift kit, firepunk stage 2 internals with a triple disc. This issue really only started when the quad was installed but it seems even with the box on 0 I still have an issue. What inputs are needed to lock the converter ? Speed sensor or anything like that?

 

 

Trans speed sensor and if u are under 90 or some stupid number and stomp on it it will unlock

 

 

Edited May 6, 20195 yr by Silverdodge

But shouldn't TC lock on the switch and not unlock until the switch is turned off??

By changing the tune it will affect how to transmission shift also. I forgot exactly why but it does affect it.

19 hours ago, Dieselfuture said:

By changing the tune it will affect how to transmission shift also. I forgot exactly why but it does affect it.

It effects the TC lock up but only via throttle input. I've removed the quad and it made zero difference its deffinatly something in the trans 

@Dynamic any insight? Also what could you price me a built VB without solenoids etc as mine are all new? Does this issue sound like a VB issue? Price including shipping and core charge please. Shipping to the UK 

On 5/7/2019 at 12:44 PM, Ronniemx3 said:

It effects the TC lock up but only via throttle input. I've removed the quad and it made zero difference its deffinatly something in the trans 

I read somewhere that when adjusting CANBUS fueling with with quad, throttle input changes therefore changing shifting on the trans.

6 hours ago, gipperkid said:

I read somewhere that when adjusting CANBUS fueling with with quad, throttle input changes therefore changing shifting on the trans.

I've changed the canbus fueling I've put the truck back to stock no change in my TC lock up issue.