Torque Convert and PCM - Theory
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Torque Convert and PCM - Theory
It's a 1995 Dodge 3500, with 5.9.
I have an intermittent issue with the Torque Convert - it jumps in and out. My son gave me the rig and he solved the problem by replacing the brake switch whenever the problem surfaced (several thousand miles or so).
I've been studying the Official Dodge Manual for my 1995 3500.
For all the "experienced" Dodgers out there (Not L.A.), I have a theory:
The torque converter clutch is controlled by signals from the brake switch, speed sensors, etc. The converter will engage at predetermined speeds in various gear ranges. It can be disengaged by a signal from the brake system or when speeds drop below the preprogrammed setting.
If I disconnect the brake-switch feed to the PCM at the Rear Wheel Anti-lock pin, and the speed control pin. A release of the foot-feed and/or application of the brake should cause the torque converter to disengage, at the appropriate speed.
In the time it takes to reach the appropriate speed, the engine would provide additional braking, much like a manual transmission.
Now, you should have the picture. Will this work, without causing damage to engine or transmission?
I have an intermittent issue with the Torque Convert - it jumps in and out. My son gave me the rig and he solved the problem by replacing the brake switch whenever the problem surfaced (several thousand miles or so).
I've been studying the Official Dodge Manual for my 1995 3500.
For all the "experienced" Dodgers out there (Not L.A.), I have a theory:
The torque converter clutch is controlled by signals from the brake switch, speed sensors, etc. The converter will engage at predetermined speeds in various gear ranges. It can be disengaged by a signal from the brake system or when speeds drop below the preprogrammed setting.
If I disconnect the brake-switch feed to the PCM at the Rear Wheel Anti-lock pin, and the speed control pin. A release of the foot-feed and/or application of the brake should cause the torque converter to disengage, at the appropriate speed.
In the time it takes to reach the appropriate speed, the engine would provide additional braking, much like a manual transmission.
Now, you should have the picture. Will this work, without causing damage to engine or transmission?
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I am not too familiar with the "older" transmissions. On my '00 and '01, I had a module from ats installed that would hold converter lock-up down to a set speed. I think the same thing can be accomplished by using a lock-up switch. You just have to remember to lock/unlock manually, where the ats module was automatic. On the 47re trans, it would not downshift out of overdrive while locked, so you could actually stall the truck if you forgot to flip the switch.
As far as damage to the trans, the only concern (that I remember), was they recommended an upgraded torque converter. There's more chance to slip the converter clutch with using the lock-up switch or the ats commander.
I would suggest checking out www.cumminsforum.com and www.dieseltruckresource.com. Both sites have a LOT more diesel info on them especially for the older generation trucks. They can also direct you to the wiring instructions for the lock-up switch, if you want to give it a shot.
Jeff.
As far as damage to the trans, the only concern (that I remember), was they recommended an upgraded torque converter. There's more chance to slip the converter clutch with using the lock-up switch or the ats commander.
I would suggest checking out www.cumminsforum.com and www.dieseltruckresource.com. Both sites have a LOT more diesel info on them especially for the older generation trucks. They can also direct you to the wiring instructions for the lock-up switch, if you want to give it a shot.
Jeff.