Gearbox Fault Query?

[RossISF]

I know these are a phenomenal car, I will hope to have one in 6months. From reading here the feedback is they are a prettly reliable beast.

Lets just say i know a few lexus/toyata mechanics. One who mentioned that he heard of a rubber bushing perishing in the radiator of the isf, the rubber is a seal in the rad between the auto gearbox fluid and the radiator coolant. I believe the auto gearbox has a cooler within the rad.

The result was water getting into the gearbox fluid and hence into the box, which in-turn created gearbox issues.

Anyone ever heard of this? was it a once off?

I believe the reported fault was a vibration up through the gearbox initially. Result recommended by lexus was a new gearbox.

Ross

[stevet]

Sounds like a one off. Never known of and transmission problems on the ISF

[Stuno1]

As above. Never heard of that happening. If you buy one with extended warranty it won't be an issue any way and you can continue to extend up to 10 years old.

Stu

[ColinBarber]

this is somewhat common on some LS models but not heard of it on the IS F. Typically the cooler is sealed so either corrosion or a weld joint failure has to occur.

[Keith_W]

Didn't see this fault mentioned on the U.S. Forum and there are thousands over there!

[stevet]

Would like to find out the validity of the fault. With so few produced I'm sure a recall would of been made.

[Womble72]

I did as much research as possible, have only been told of there excellent reliability, hence having bought one, this is my 4th Lexus IS, and loving every minute of ownership