Transmission Mount Question
#1
Driver School Candidate
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Hi all, I'm new to the forum. I daily a 1999 LS400, and just crested 130K miles. I've noticed some slight vibration at highway speeds, and I've purchased a replacement transmission mount. I plan on doing this job myself this coming weekend. I have read some tutorials on the process, and I am familiar with working on cars.
My question is this: Is there a correct direction to install this mount? Or is it symmetrical and it does not matter which side faces the front? It appears to be symmetrical, the only difference I can see is the letters "NR" on one side.
I have linked two pictures that show the mount from the two different sides:
![Transmission Mount Question-e0bm8il.jpg](https://www.clublexus.com/forums/attachments/ls-1st-and-2nd-gen-1990-2000/489241d1683151869t-transmission-mount-question-e0bm8il.jpg)
My question is this: Is there a correct direction to install this mount? Or is it symmetrical and it does not matter which side faces the front? It appears to be symmetrical, the only difference I can see is the letters "NR" on one side.
I have linked two pictures that show the mount from the two different sides:
![Transmission Mount Question-e0bm8il.jpg](https://www.clublexus.com/forums/attachments/ls-1st-and-2nd-gen-1990-2000/489241d1683151869t-transmission-mount-question-e0bm8il.jpg)
![Transmission Mount Question-tvfnhdz.jpg](https://www.clublexus.com/forums/attachments/ls-1st-and-2nd-gen-1990-2000/489242d1683151869t-transmission-mount-question-tvfnhdz.jpg)
#3
Driver School Candidate
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I'll be changing oil, drain and fill transmission, and replacing the mount while I've got the car up, wish me luck.
The following users liked this post:
spuds (05-02-19)
#5
Driver School Candidate
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Got everything done without much drama. I made things just a tad more difficult on myself by using ramps instead of jacking the car all the way up on stands, in retrospect I could have used the few extra inches of clearance.
The old trans mount looks like a marshmallow after a sumo wrestler sat on it. The new mount was tangibly stiffer.
I was only able to take a 10 minute test drive, and was not able to get to highway speeds, but the difference is already very obvious. Some small vibrations under 35mph that I had written off as normal for a car with 130k on the clock are completely erased. I've only had the car since last year (purchased at 120k mileage), and this honestly feels like a new car.
The 2 quarts of trans fluid I dumped came out nice and red and looks really clean, with no off smells. I probably won't bother doing again for some miles.
Thanks for the replies!
The old trans mount looks like a marshmallow after a sumo wrestler sat on it. The new mount was tangibly stiffer.
I was only able to take a 10 minute test drive, and was not able to get to highway speeds, but the difference is already very obvious. Some small vibrations under 35mph that I had written off as normal for a car with 130k on the clock are completely erased. I've only had the car since last year (purchased at 120k mileage), and this honestly feels like a new car.
The 2 quarts of trans fluid I dumped came out nice and red and looks really clean, with no off smells. I probably won't bother doing again for some miles.
Thanks for the replies!
Thread
Thread Starter
Forum
Replies
Last Post
Twista4004
LS - 1st and 2nd Gen (1990-2000)
9
08-25-14 02:00 PM
Eds98LS
LS - 1st and 2nd Gen (1990-2000)
3
03-30-13 08:27 PM
Speedboat
LS - 1st and 2nd Gen (1990-2000)
11
07-09-11 06:21 PM