Whats The Problem?

VicSC300 · August 27, 2008

Lately I have observed that my 94 SC300 has been doing some strange things.

1) Automatic transmission shifter knob shakes in 3rd gear between 35-45 MPH. Developed and has seemed to worsen over time.

2) Car tends to shake when coming to a stop in third gear. Shaking could be described as a type of forward and back rocking. It is a feeling similar to brake problems or if you were to pump the breaks while stopping but only occurs when slowing to a stop in 3rd gear.

A friend of mine has mentioned engine and transmission mounts, and while I agree that this can be a problem with similar effects, the details surrounding a particular gear leave me to believe it is strictly transmission related.

I am going to change the transmission fluid and see if it helps at all but if anyone has any thoughts, ideas, or pro-tips, I would appreciate it.

Side Note: By third gear I mean that the transmission switches gears three times from a complete stop with overdrive on and in the normal transmission time option.

Thanks.

UCF3 · August 29, 2008

It sounds like the transmission mount. I'd suggest replacing the mount(s) before changing the fluid, unless you think it's needed.

SeanGrac · August 30, 2008

It sounds like the transmission mount. I'd suggest replacing the mount(s) before changing the fluid, unless you think it's needed.

If you are going to change the trans mounts, change the eng mounts as well.

jzz30 · August 30, 2008

change the engine and trans mounts and also the rear trailing arm bushings. the rubber on the bushing has probably deteriorated and is moving in the hub. take a look at this DIY thread. the proceedure pics are on the second page:

http://us.lexusownersclub.com/forums/index...c=6262&st=0