Transmission lockup??
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Safety Car
Joined: Jul 2001
Posts: 3,615
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From: New Lenox IL
Transmission lockup??
I called up the mechanic to see if my car was done and he said it was. During our conversation, he said that the lockup was disconnected and asked if I wanted it hooked back up. I didn't know what he was talking about (possibly ASR?) and he said it was basically like another gear and people that do a lot of city driving don't like it and have it disconnected. I told'em to just hook it back up cause I figure if its supposed to be, then why not, right? Anyone know what he's talking about? I haven't heard anything about it.
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From: The Top of Utah
Re: Transmission lockup?? (Lord Odin)
TCC. Torque Converter Clutch. It is ECM controlled, and postively locks the engine to the transmission, just like the clutch in a manual transmission car. You want it hooked up. Like he said, it can be an annoyance in city traffic, with constant engage/disengage. A chip change can alter that if it is a problem for you. Disconnected the converer slips. This reduces gas mileage and can cause the trans fluid to get hotter than it needs to be. It might be part of the reason your car is in there in the first place. Good luck, and...
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Pro
Joined: May 2003
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From: WATERFORD CT
Re: Transmission lockup?? (Lord Odin)
Was there a Tourqe converter lock up DELAY kit on there possibly?This kit does not alow the trans to go into lockup until 4th gear overdrive and they are popular. .What you could do is go for a highway drive or just get the car to about 50mph or so,then without taking your right foot off the gas tap the brake pedal with your left foot,the rpms should shoot up a few hundreds since this would unlock the converter for a second.So try this and if it works that means that your Tourqe conveter is just not locking up at low speeds due to reprograming wich is a good thing!
Thread Starter
Safety Car
Joined: Jul 2001
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From: New Lenox IL
Re: Transmission lockup?? (montie98)
I've no idea how long it was disconnected for, so I'm not sure what to look for. Would there be any kind of performance increase/decrease with it back on?
In city driving, does it feel like its constantly shifting with it on?
Was the torque converter even being used before, with it off?
I'm really curious about this thing cause it sounds like something important that I've been missing out on and want to know how it'll affect how my car feels.
In city driving, does it feel like its constantly shifting with it on?
Was the torque converter even being used before, with it off?
I'm really curious about this thing cause it sounds like something important that I've been missing out on and want to know how it'll affect how my car feels.
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From: The Top of Utah
Re: Transmission lockup?? (Lord Odin)
How often and when it engages/disengages varies from car to car and year to year. If you really hate it, you can alway unplug it again. With the lock up clutch unplugged you were never, NOT using your converter. The clutch locks and bypasses all converter functions, including gas wasting, heat building, slip. It doesn't lock until 3rd gear usually, so it will not affect your take off. Also, it doesn't function at WOT, so it shouldn't affect your 1/4 mile runs. Good luck, and...
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Safety Car
Joined: Dec 2002
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From: Charleston SC
Re: Transmission lockup?? (Lord Odin)
I disagree with both of the previous post. You have done the right thing by reconecting the lock up wiring. If you run an OD transmision in 4th without the lockup for any amount of time you are causing the trany to realy heat up and it will shorten the life of your trany, and not by a little either. If you do a lot of driving in trafic just drive the car in 3rd and you will be fine. What ever you do do not drive the car in 4th with the TC lockup disconected or you will be buying a new trany sooner rather then later. I have a trany temp gauge and have tried to run the trany in 4th without lock up and it sores past 200 deg. with lock up, it is nice and cool (around 160).
Good luck and you did the right thing.
P.S. It is ok to disable the lock up for drag racing because it is in OD for such a short time.
[Modified by 84LT1, 3:28 PM 11/28/2003]
Good luck and you did the right thing.
P.S. It is ok to disable the lock up for drag racing because it is in OD for such a short time.
[Modified by 84LT1, 3:28 PM 11/28/2003]
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From: The Top of Utah
Re: Transmission lockup?? (84LT1)
84LT1,
Would you care to re-read my two posts and re-comment? I NEVER advocated leaving the lock up unplugged. In my second post I DID say that if he really hated it, he could re-unplug it. But I agree with you and I would NEVER reccommend it. Also, in case you haven't paid attention to Lord Odin's previous posts, the shop the car is in is the trans shop. I made reference in my first post, that the disconnected TCC was probably a contributer to the car being there in the first place.
I am very surprised the shop offered the option of leaving it disconnected. I cannot imagine they could stand behind their work with the TCC disfunctional. Good luck, and...
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Would you care to re-read my two posts and re-comment? I NEVER advocated leaving the lock up unplugged. In my second post I DID say that if he really hated it, he could re-unplug it. But I agree with you and I would NEVER reccommend it. Also, in case you haven't paid attention to Lord Odin's previous posts, the shop the car is in is the trans shop. I made reference in my first post, that the disconnected TCC was probably a contributer to the car being there in the first place.
I am very surprised the shop offered the option of leaving it disconnected. I cannot imagine they could stand behind their work with the TCC disfunctional. Good luck, and...
RACE ON!!!
Safety Car
Joined: Dec 2002
Posts: 3,655
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From: Charleston SC
Re: Transmission lockup?? (CFI-EFI)
CFI-EFI
I reread you post and I don't see what your problem with my post is. You did make a slight reference to trany heat but did not make it clear that driving the car in drive without the TC in lock up would trash the trany. Yes I did notice that the car was at a trany shop and that is why I stated to NEVER run the car for any length of time with out the TC lock up. The only reason I made the post in the first place was to make clear you should never run an OD trany with the TC lock-up disabled and "disconnecting it if you don't like it is not a very good idea".
I reread you post and I don't see what your problem with my post is. You did make a slight reference to trany heat but did not make it clear that driving the car in drive without the TC in lock up would trash the trany. Yes I did notice that the car was at a trany shop and that is why I stated to NEVER run the car for any length of time with out the TC lock up. The only reason I made the post in the first place was to make clear you should never run an OD trany with the TC lock-up disabled and "disconnecting it if you don't like it is not a very good idea".
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Joined: Sep 2000
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From: The Top of Utah
Re: Transmission lockup?? (84LT1)
CFI-EFI
I reread you post and I don't see what your problem with my post is.
I reread you post and I don't see what your problem with my post is.
I disagree with both of the previous post.
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Intermediate
Joined: Nov 2003
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Re: Transmission lockup?? (CFI-EFI)
I too agree one should never (aside form the race track)drive with the TCC "unhooked","disconeccted","by-passed",or otherwise not functioning during routine touring/hiway operation.
For trouble shooting purposes, however; I wish to temperarly interupt the circuit, but I'm unable to find the fuse/relay. Your assist. is much appreciated.'94,LT1,Auto,Coupe. Tanx
Safety Car
Joined: Dec 2002
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From: Charleston SC
Re: Transmission lockup?? (abtanner)
abtanner,
You have a more complicated problem because you have the L460E. Looking at my book I see no easy way to acomplish what you want to do without disconecting a wire from the ECM for the TC lock-up signal.
The only fuse I see feeds all of the solinoids in the trany ( 1-2, 2-3, 3-2, TCC PWM, and TCC lock up) You coulod probably install a toggle SW between the ECM and the trany on the TCC lock-up signal. Acording to the book I have (Corvette Fuel Injection by Charles Prbst) the wire is a Tan/Black wire that runs from ECM pin D11 to the trany pin T. If you decide you want the switch have someone with a Helms man. double check the wire color and pins because I have seen a few errors in my book in the past.
Good luck and I hope this helps
You have a more complicated problem because you have the L460E. Looking at my book I see no easy way to acomplish what you want to do without disconecting a wire from the ECM for the TC lock-up signal.
The only fuse I see feeds all of the solinoids in the trany ( 1-2, 2-3, 3-2, TCC PWM, and TCC lock up) You coulod probably install a toggle SW between the ECM and the trany on the TCC lock-up signal. Acording to the book I have (Corvette Fuel Injection by Charles Prbst) the wire is a Tan/Black wire that runs from ECM pin D11 to the trany pin T. If you decide you want the switch have someone with a Helms man. double check the wire color and pins because I have seen a few errors in my book in the past.
Good luck and I hope this helps
Safety Car
Joined: Dec 2002
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From: Charleston SC
Re: Transmission lockup?? (CFI-EFI)
CFI-EFI,
I just misunderstood what you where saying that’s all. If your point was not to disconnect the TCC lock-up then I agree with what you are saying.
:cheers:
I just misunderstood what you where saying that’s all. If your point was not to disconnect the TCC lock-up then I agree with what you are saying.
:cheers:
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 3,615
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From: New Lenox IL
Re: Transmission lockup?? (84LT1)
Well after driving it around a bit, I haven't noticed any difference. I think they forgot to connect it back at the dealership I brought it into cause they figured it was gonna get disconnected anyway. All is good. :cheers:
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From: The Top of Utah
Re: Transmission lockup?? (Lord Odin)
All is NOT good if they left it disconnented. If you don't feel at least 4 "shifts" under moderate acceleration from zero to, sixty, say, go back and make sure they hooked it up. You NEED it. Positive enough, this time, 84LT1?
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Thread Starter
Safety Car
Joined: Jul 2001
Posts: 3,615
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From: New Lenox IL
Re: Transmission lockup?? (CFI-EFI)
All is NOT good if they left it disconnented. If you don't feel at least 4 "shifts" under moderate acceleration from zero to, sixty, say, go back and make sure they hooked it up. You NEED it. Positive enough, this time, 84LT1?
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