I have a 2007 Lexus IS250 AWD. The car changes gears fine it's just that from 2nd->3rd gear I get a slight thump, a second after 3rd gear engages. It doesn't happen with any other gear or even going from 3rd->2nd. Only on the upshift.

I brought it to the dealer and that was a waste of time and money, paid $125 to have a mechanic go on a road test with me to hear the thump then he said the transmission is going without doing any other diagnostics and ofcourse they quoted me for a lexus rebuilt tranny at over $4K+almost $2K in labor. I asked them if a flush could be tried first, they said that could just kill the tranny and plus they don't have the fluid exchange machine at this particular dealership.

I contacted another dealership in the area and they do have the machine so I made an appointment to get a flush done this Friday. Any other advice would be greatly appreciated in case the transmission does fail. Thank you. Do I really need a new tranny? If I do should I get a low mileage used one or a rebuilt one from Lexus or have it rebuilt by AAMCO?

 

if your transmission is going a flush won't make any different, in fact it will make your transmission go even faster!
also, i would NEVER suggest you go to AAMCO, you should try google around....

I just noticed you're in NY, i had my Acura TL transmission built twice from 2 different shops and each lasted about 20k miles. my suggestion is go get a used low miles transmission.

 

how many miles you got in your car?

 

97K miles.....

 

the powertrain warranty is 72 months 70K miles....

I would go to another dealer for 2nd opinion before you get the transmission replaced....

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Powertrain Warranty The Powertrain Warranty is for 72 months or 70,000 miles, whichever occurs first. Except for the situations listed on the Basic Warranty page, this warranty covers repairs needed to fix defects in materials or workmanship of any component listed below:
•Engine: Cylinder block and head and all internal parts, timing belt and cover, flywheel, oil pan, water pump, fuel pump, engine mounts, engine control computer, seals and gaskets
•Transmission and Transaxle: Case and all internal parts, torque converter, clutch cover, mounts, engine control computer, seals and gaskets
•Front-Wheel-Drive System: Driveshaft, axle, hub, bearings, seals and gaskets

See your Lexus dealer for complete details on the Lexus Powertrain Warranty.

 

I'm scheduled at another dealer tomorrow, I will let you guys know how it turns out.

 

I wonder how that felt transmission filter is holding up. I currently have 79k on my '08 IS250 RWD, I plan on dropping the pan around 90k to replace the filter.

 

So after diagnosis by the dealer they said that I have a slipping clutch and worn out tranny mounts. Quoted me 6K for the parts and labor. They refused to do any tranny flush for me because they feel it would make the issues worse and they would be held liable. Talked to the service manager and fought back to have them do it anyway and the liability would be mine but they remained adamant about it so I took my car.

 

dealer is right, indeed a flush will make it worst!

 

Slipping clutch? So auto or manual trans here?

 

Automatic.

 

Cheaper alternative...purchase a good, used trans and have a local mom & pop shop install it :

http://www.ebay.com/itm/06-07-08-09-10-11-12-LEXUS-IS250-AUTOMATIC-TRANSMISSION-SDN-AWD-/151182449855?pt=Motors_Car_Truck_Parts_Accessories&hash=item23332d1cbf&vxp=mtr

 

My previous nissan mechanic said the same, thanks. Let me see what this BS 3rd party warranty will cover and then I'll decide.

 

i second finding a good used tranny, im am sure there is a junkyard somewhere in your area with a low mileage is transmission