2010 Lincoln Town Car jerks forward/backward when switching to D/R

Question

Hello,

I have a 2010 Lincoln Town Car with 130k miles on it. The car runs perfect other than one issue that was present since I bought it years ago, and I cannot figure out:

Every time when I put the car in drive or in reverse, the car will jerk forward (D) or backward (R) whenever the gear is engaged. Other than this, the transmission works flawlessly.

I check the motor mounts and they are good. I did not check or replaces the transmission mount because that is a pain in the butt. I did change the fluid when I got the car with 110k miles on it, and then tried some Lucas stop slip but it did not work.

Then, when it had 130k miles, I decided to change the fluid again together with dropping the pan and changing the filter. I could find the "cherry" when I replaced the filter, which means that I am the first one to drop the pan and change the filter. I used the original fluid but the car is still jerking forward when I put in in D or R.

Is anything wrong with the tranny? What can I do to fix this? I even send the old fluid to a lab for an analysis (you can find the report here: https://towncar2010.tiiny.site

Thank you!

Chuck Tobias · Accepted Answer

[quote data-userid="180190161" data-postid="315267"] I did not check or replaces the transmission mount because that is a pain in the butt. [/quote] Well that needs to be checked. If it's bad it can lead to the other mounts being damaged over time. [quote data-userid="180190161" data-postid="315267"] tried some Lucas stop slip but it did not work. [/quote] Not surprising. The expected outcome with that kind of product is that it will not work. If it did, the effect would only be temporary. [quote data-userid="180190161" data-postid="315267"] Is anything wrong with the tranny? [/quote] No way to tell from here. [quote data-userid="180190161" data-postid="315267"] What can I do to fix this? [/quote] Take it to a transmission expert who can diagnose it using a high-end scan tool. [quote data-userid="180190161" data-postid="315267"] I even send the old fluid to a lab for an analysis (you can find the report here: https://towncar2010.tiiny.site. [/quote] The report looks to be inconclusive. It does show what could be interpreted as excess wear but if the fluid had never been changed before it could be left over from the initial break-in period. Chances are though that if the fluid had never been changed in 130K miles there is some level of internal damage.