Tongyong19

Hey All

1999 LS400 with 120000 miles, when the car is in car and I rev the engine to 1800 RPM, it starts shaking and then dies and then again at 2800 RPM, never noticed it while driving but I'm thinking is the transmission mount. Any thoughts? I was going to swap out all the mounts anyways since I bought the car with 120k miles and these things wear eventually.

Also, anything special about these mounts that I need to be aware of? Hints or Tips would be nice. I've done plenty of motor mount replacements before and everyone is different.

Thanks

Leeroy

I have a 2000 with 130,000 miles that had the same issue. My trans mount was completely separated. A new OEM mount that I ordered from Belle Lexus fixed the issue completely. And the car drives beautifully, with the exception of every control bushing needing replacing.

timmy0tool

iTrader: (7)

a torn/broken trans mount is most common source of vibrations, usually during driving, not while standing still and revving. i suspect the engine mounts to be toast, and the culprits causing the vibes during a standstill.

i would replace the trans mount first as it's very easy to do (4-bolts, hold the trans with a jack, and replace) before tackling the motor mounts which require a partial removal of the lower subframe.

sha4000

iTrader: (1)

All you need to know about changing those mounts.

https://www.clublexus.com/forums/ls-...placement.html

700bones

BTW, I'm about ready to do this replacement after I finish up rotors/pads this morning.

Does anyone have torque specs for those tranny mount bolts? I've searched and searched and searched, all the tutes here and elsewhere just say "just crank'em down"

aptoslexus

aptoslexus

700bones

Holy crap putting in a new tranny mount makes a TON of difference! It rides like a new car now!

Scraape

yup, did my tranny mount today and definitely a good idea to change them.