94 LHS transmission shudder

First thing is to get the AT fluid changed with Chrysler fluid and NO additives at your Chrysler dealer. ATF + 3 or +4 are the right Chrysler fluids. Remember no additives.

My 94' did this too. I never fixed it during the 75k miles I had it. I lessened the problem by changing the xmission fluid every 20k and adding a "no shudder" additive that was sold by Lube Guard. It worked for about the first 5 - 7k miles but I think that the additive wears out after a period of time and the shudder would come back. Mine was only noticeable on a slight uphill grade like we have around Pittsburgh, Pa. Also, anytime you downshift it would go away above 3k engine rpms. It was really only noticeable at around 1.5k - 2k under a light load. I did try changing the plugs and wires to solve it but that didn't make any difference either. It's hard to tell sometimes if it's a miss or what. I read recently that the sensors for the knocking mechanisms do go bad after a period of time. I have a hard time believing that as they are just a simple microphone method with a Piezo element but it is a possibility. If I would have had mine still I would have tried changing it to see if that was the case. Maybe you could try the wires and plugs, r/r the fluid (use either ATF III + or IV + ) and add the Lube Guard No shutter additive and then also change the knock sensor. That would cover all the bases.

Steve m.... (former 115k 94' LHS owner.. )

There may also be a software patch for your AT. I would not recommend any additive as suggested by another poster.

There is definitely a new version of the software for a 94 (several, most likely), assuming its never been updated before.

Hi,

I took the car to a Chrysler dealer who told me that my c> Art wrote:

recommend any

(dealer/independant)

Yep, a post-'95 unit with the finned case that *can* be flashed.

, searchable used auto parts continent-wide.

1997 Chrysler LHS "Computer box not engine"

Next screen: "Transmission control"