Do you guys know if there would be any difference between using something like this http://www.autotransinc.com/shudfix.htm versus a chip from geno or dennis? I am thinking a chip would control lockup and a variety of other stuff, but I saw a post by a guy on Modular Technical Forum that seemed to praise this gadget pretty well. http://mtcforum.zeroforum.com/zerothread?id=2807
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Controlling torque converter lockup
- Thread starter cragus
- Start date
RE: Controlling torque converter lockup
Go with the chip from Dennis. If you're experiencing shudder, this is what a knowledgable person had to say about it...
There is one more problem that I have not mentioned and it affects mainly the 11.25" converters. The lockup plate is about 10" in diamter. The one in almost all Marks, until mid '97, is totally flat. As it pushes back and forth and applies, it deflects. There is fluid pressure pushing from the back side of the converter toward the front. After alot of cycles it permanently deflects and is now shaped like a contact lens. When this happens the radius at which it contacts the front of the converter is reduces. Since the torque capacity of the clutch is directly proportional to the radius it applies at, the smaller the radius the less capacity, the more prone to shudder.
In mid 1997 they changed the lockup plate to be similar to the one in the 12" converter (this was changed in 10/94) to have ribs in the plate and a thicker plate itself. This prevents the deflection and keeps the contact radius uniform
So, put in a newer converter and you'll be OK.
Go with the chip from Dennis. If you're experiencing shudder, this is what a knowledgable person had to say about it...
There is one more problem that I have not mentioned and it affects mainly the 11.25" converters. The lockup plate is about 10" in diamter. The one in almost all Marks, until mid '97, is totally flat. As it pushes back and forth and applies, it deflects. There is fluid pressure pushing from the back side of the converter toward the front. After alot of cycles it permanently deflects and is now shaped like a contact lens. When this happens the radius at which it contacts the front of the converter is reduces. Since the torque capacity of the clutch is directly proportional to the radius it applies at, the smaller the radius the less capacity, the more prone to shudder.
In mid 1997 they changed the lockup plate to be similar to the one in the 12" converter (this was changed in 10/94) to have ribs in the plate and a thicker plate itself. This prevents the deflection and keeps the contact radius uniform
So, put in a newer converter and you'll be OK.
RE: Controlling torque converter lockup
>> The one in almost all Marks, until mid '97, is totally flat.
Do you have any more specific info on when this was changed, or how to tell which one you have? I don't have any problems yet, at 69K miles and Mercon V, with no modifications, but it would be nice for the "heads-up".
John
[link:mark8.org/lodnca|NorCal Chapter Website]
http://mark8.org/users/johnaec/Mark_VIII_s.jpg
'97 Mark VIII LSC
'96 T-Bird 4.6L
>> The one in almost all Marks, until mid '97, is totally flat.
Do you have any more specific info on when this was changed, or how to tell which one you have? I don't have any problems yet, at 69K miles and Mercon V, with no modifications, but it would be nice for the "heads-up".
John
[link:mark8.org/lodnca|NorCal Chapter Website]
http://mark8.org/users/johnaec/Mark_VIII_s.jpg
'97 Mark VIII LSC
'96 T-Bird 4.6L
GRAND_LS 400
Registered
RE: Controlling torque converter lockup
Another reason to be glad.. Mine has stickers all over indicating it was manufactured on May 25 or something of 1997. One sticker even had the time.. Looks like a computer printout. They can be found on your Speedo, under your center console, and a few other places aside from your doorjam.
Another reason to be glad.. Mine has stickers all over indicating it was manufactured on May 25 or something of 1997. One sticker even had the time.. Looks like a computer printout. They can be found on your Speedo, under your center console, and a few other places aside from your doorjam.