Torque converter lockup
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Senior User
Joined: Jul 2002
Posts: 122
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From: VA
Torque converter lockup
Add me to the list of expys with the TC lockup shudder. My 97 with 177k started doing it so I immediately took it to the Ford dealership for a flush hoping it would take care of it. But after a full tank of gas run through it, it still has the shudder. I have searched and read about an anti-shudder additive that some people have had luck with. I guess this is my next try.
Any suggestions as what additive to try? I have seen the lucas brand around here. What do folks recommend?
Also, what is the result if it still does it? Is there any other preventative measure that I can take? Is it worse to wait til it goes out or have a trusted tranny shop go into her now (if an additive doesn't do the trick)?
Any suggestions as what additive to try? I have seen the lucas brand around here. What do folks recommend?
Also, what is the result if it still does it? Is there any other preventative measure that I can take? Is it worse to wait til it goes out or have a trusted tranny shop go into her now (if an additive doesn't do the trick)?
Senior User
Joined: Oct 2001
Posts: 167
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From: Maryland
Hi, I had what I thought was the same problem, only at 78000 miles on my 2001. In the end I did the plugs and the COPS. Plugs had significant wear, didn't test the COPS since I already had the plugs being done. Afterwards, no shudder at 1800 or so RPM when lightly accelerating and any other minor shudder was gone.
I know your miles are much higher than mine, have offered this opinion to several others, I have decent amateur car experience, but certainly am not any expert. At least make sure your plugs and cops are good.
Thanks
Mike
I know your miles are much higher than mine, have offered this opinion to several others, I have decent amateur car experience, but certainly am not any expert. At least make sure your plugs and cops are good.
Thanks
Mike
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Senior User
Joined: Jul 2002
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From: VA
Yeah, I need to do plugs and wires (no coil packs) sometime in the near future anyway. This does feel just like the TC and it feels different than the shudder I got when it was time to change the plugs the last time. No hesitation or change in rpm, but a distinct shudder from the tranny when going in and out of OD. However, the plugs will be done too.
How long have folks gone before the shudder led to something finally breaking or wearing out?
How long have folks gone before the shudder led to something finally breaking or wearing out?
Postmaster
Joined: Oct 2006
Posts: 4,171
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From: SE Texas
Is it "shuddering" when shifting to OD, or when the Torque Converter locks? These are totally different operations with different friction elements involved, and diagnosing the "shuddering" problem will require an accurate description of when it's happening.
JL
JL
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Joined: Jul 2002
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From: VA
Sorry for the bad description. It is definitely when the torque converter locks up and not in and out of gears. If can be close to the gear change but it isn't actually on the shift. It only does it around overdrive and not through the first few gears would have been a more accurate description. My bad.
Is it time for a new converter before it destroys the transmission? With that many miles would it be worth it to do both while in there?
Is it time for a new converter before it destroys the transmission? With that many miles would it be worth it to do both while in there?
Postmaster
Joined: Oct 2006
Posts: 4,171
Likes: 12
From: SE Texas
Sorry for the bad description. It is definitely when the torque converter locks up and not in and out of gears. If can be close to the gear change but it isn't actually on the shift. It only does it around overdrive and not through the first few gears would have been a more accurate description. My bad.
Is it time for a new converter before it destroys the transmission? With that many miles would it be worth it to do both while in there?
Is it time for a new converter before it destroys the transmission? With that many miles would it be worth it to do both while in there?
With 177K on the original trans,(and a '97 at that with the weak and failure prone roller-type intermediate one-way clutch) I'd rebuild the trans and replace the converter. There are several options for a durable, fairly reasonable repair, but if you decide to just have it rebuilt-you need to make sure they aren't going to just rebuild it to stock '97 specs.
JL
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