Pulsed Lockup converter

[CTX-SLPR]

Howdy,

I was reading a bit about tranny controls for my 97.5 Regal GS and I noticed that the torque converter lockup is not a bianary device, it actually has a pulse modulated lockup on it. I was wondering, forgetting the controller part of it, what would happen if you did something like this with a good aftermarket lockup converter on the TH200-4R?

Thanks,

 

[bruce]

Howdy,
I was reading a bit about tranny controls for my 97.5 Regal GS and I noticed that the torque converter lockup is not a bianary device, it actually has a pulse modulated lockup on it. I was wondering, forgetting the controller part of it, what would happen if you did something like this with a good aftermarket lockup converter on the TH200-4R?

Only if you run the lower HP levels.
It was a drivibility thing, ie to min TCC chatter.

If your worried about distrubing you tea while driving then you might want to use on your 4R..

 

[CTX-SLPR]

So no fuel economy, effeicency, or other gains from the system? Just an NVH addition? Hmmm... Well on the TH200-4R the TC lock system is just a solenoid that gets power or not right? If thats the case, Maybe I can get the computer to either run it directly with a 0 and 100% threshold difference or make it run a relay to do the same thing. Hmm relay, switch the power leg to the relay so that I can keep it unlocked for the drag or not. Any disadvantage to having it lock in 3rd gear?

thanks,

 

[GNeric]

They were modulated to calm customer complaint of "abrupt apply" with the old systems. You will need a carbon-fiber woven clutch to make sure it doesn't burn. The paper clutch will get destroyed with pulse modulation. Seen too many 4L60-E trannies come in that had just been rebuilt and they used a regular converter and we get to do it right at more cost to the customer, then they get to try and recover losses from the past rebuilders.

 

[CTX-SLPR]

Ah... ok, no I don't want an NVH solution with a custom converter. Any idea if the signal from the computers for lockup on those cars can be used by the old school solenoids or will I be limited to the B&M external lockup control kit?

 

[bruce]

Ah... ok, no I don't want an NVH solution with a custom converter. Any idea if the signal from the computers for lockup on those cars can be used by the old school solenoids or will I be limited to the B&M external lockup control kit?

Depending on what editing software you have, you might be able to adjust the PWM, to 100% DC, so that it is on/off.

The only TCC aftermarket devise that I've like was the one DigitialHP was gong to sell. Without some adjustible hysterisis, TCC control is a pain, ie the DHP was the only one that offered that.