Torque Converter Lockup Delay
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Junior User
Joined: Sep 2002
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From: North Texas
Torque Converter Lockup Delay
So I've been searching for this for awhile and can't find any threads that address delaying the signal for TC lockup. I was thinking it would be a lot nicer if my TC would lock after all of my acceleration is done. Perhaps a 30-60 second delay or so? Is there a device out there that would accomplish this? I was thinking maybe some sort of timer purchased from an electronics store could delay a signal for a specified amount of time once it was first actuated. I don't even know if this would work right. Maybe it would cause the Overdrive light to flash.
I did some reading about "The Cure" and it sounds like a good thing, but this would have no change on when the TC locks up. I don't like the engine bogging and getting my EGT's high, ya know? And black smoke is cool and all but there are many times I'd rather not blow it all over the unsuspecting motorist behind me! Lol!
Anyway, if anyone has any advice on this I'd sure be interested. Thanks!
Matt
I did some reading about "The Cure" and it sounds like a good thing, but this would have no change on when the TC locks up. I don't like the engine bogging and getting my EGT's high, ya know? And black smoke is cool and all but there are many times I'd rather not blow it all over the unsuspecting motorist behind me! Lol!
Anyway, if anyone has any advice on this I'd sure be interested. Thanks!
Matt
Fleet Owner
Joined: Aug 2004
Posts: 20,418
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From: AZ
Why would you want your tc to wear out faster then it should by slipping more until lock? Just don't let it go into overdrive to avoid bogging down and EGT's getting high. I really do know what your talking about though but I don't like thinking that my TC is slipping and getting hot.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,695
Likes: 2,616
From: SE Florida
Running with the torque converter unlocked does not wear the torque converter.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,695
Likes: 2,616
From: SE Florida
The clutch in the torque converter is completely disengaged until it locks. The ATF is driving the converter when it's unlocked, the clutch is just along for the ride, waiting for it's turn.
There is a good explanation of how it works, complete with illustrations, at www.howstuffworks.com.
There is a good explanation of how it works, complete with illustrations, at www.howstuffworks.com.
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Junior User
Joined: Sep 2002
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From: North Texas
I do leave it out of overdrive when needed, but that doesn't help the "short shifting" that happens when the trans is in 3rd gear and the TC locks at 45mph. Under normal conditions thats fine, but when you're towing up hill it's quite a pain! That's where Tony set this chip to engage at I guess. I don't want to have him bump up the speed even higher because the fact of the matter is that you do want your TC to lockup before too long, because it can overheat the fluid. I just figured that maybe some sort of delay might solve the problem by engaging the TC later after the trucks had a chance to build speed and RPM's.
Mark, what kind of programming do you mean? Can you do this by further tuning of the TW chip? I have to admit, I'm not really sure what the capabilities of tuninig these computers are.
Matt
Mark, what kind of programming do you mean? Can you do this by further tuning of the TW chip? I have to admit, I'm not really sure what the capabilities of tuninig these computers are.
Matt
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Post Fiend
Joined: Oct 2003
Posts: 5,903
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From: MICHIGAN
You can install a switch for the TC lockup. Here's more info:
https://www.ford-trucks.com/forums/5...questions.html
https://www.ford-trucks.com/forums/5...questions.html
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Junior User
Joined: Sep 2002
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From: North Texas
Hmm. That's true. Every time I gave a thought to putting in a switch it was always to lock it manually. I never really thought about putting one in to keep it from locking. If there's no good way to handle it electronically then maybe that's what I'll do. I would probably mostly just use it if I'm towing anyway, and then go ahead and flip the switch to allow it to lock up once I'm done accelerating.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,695
Likes: 2,616
From: SE Florida
The ONLY thing that controls when the torque converter locks and unlocks is the chip. I assume the a TW chip can change when it locks and unlocks. It is not a one speed fits all, it is a table of pedal position and vehicle speed. It can be tuned to lock at a low speed at light pedal and a high speed at high pedal, or vice versa. I don't know what TW's capabilities are, but the chip is capable of what you want.
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Junior User
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From: North Texas
That's good information too. I have noticed, to my frustration, that when I get on it more it seems to lock up at 35mph instead of 40 like normal. Maybe that's how he set it up, thinking that if there was a heavy load it'd be better to have the converter locked. It's really just annoying to me. It feels like what you're trying to accomplish is defeated when you mash the pedal and what you get is a short shift. Maybe I should give him a call to talk about a reprogram of the shift parameters. Is he even still doing this? It's been years since I bought this chip.
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