Engine/Transmission (1998.5 - 2002) Converter Lockout - not- Lockin

[LKothe]

Hi Ya'll,

I have a 98 1/2 that I purchased with 80,000 on it. I installed the mystery switch and find it to be very helpful until I forget to shut it off. It does remind me real quick at 700rpm. What I would like to know is if anyone knows how to install a switch so I can "keep" the converter unlocked, which is just the opposite of the mystery switch. I think this would really help when I'm towing a loaded trailer. Thanks for the help and since I'm new to TDR and CTD, I'll probably be bugging everyone for answers. Really enjoy the site.





Thanks, Larry

 

[Steve St.Laurent]

Moving to the 24v engine and transmission forum

 

[rrausch]

Before I got my transmission upgraded I had a Mystery Switch and it had 3 positions: Always Locked---Stock Operation---Always Unlocked.



Jim Leonard installed it on the previous owners truck. There must be some threads about this. Maybe someone else will chime in here and tell you where a schematic is for this set up.

 

[robertyoke]

Originally posted by LKothe

Hi Ya'll,

What I would like to know is if anyone knows how to install a switch so I can "keep" the converter unlocked, which is just the opposite of the mystery switch. I think this would really help when I'm towing a loaded trailer.



Thanks, Larry

pulling loaded trailer with tc unlocked=heat, lots&lots of heat. I not sure why you would want your tc unlocked unless you are thinking you input shaft will break w/locked shifts.

 

[LKothe]

The only reason I want to keep the converter unlocked is for the extra couple hundred rpm which seems to be just enough to pull some hills without lugging the engine as much.

 

[Scheibins]

I would think turning the OD off would be a better solution. No?

 

[JimKing]

Lock in / out

Take a look at the BD 3.



The ad says:



The TorqLoc 3 position switch allows you to lock up the converter on demand.



This will result in 100% rpm transfer, lower transmission temperature and excellent transfer of retarding hp when slowing down. The second position is for unlocking the converter when you have a high torqued engine that can cause the converter lock up clutch to slip or if you don't have enough power and are lugging the engine. The third position is a stock position



The computer will automatically disengage the lock up clutch at 25 mph to prevent the engine from stalling if you forget to switch the lock up off.