jamessouza

Hello,

I have a 2006 Lexus GS300 RWD.

I just hit 100,000 miles and my transmission is shifting harder than normal. Even when it downshifts it still shifts pretty hard.

Is it possible that it just needs a drain and fill? It shifts in sequence still. It also revs just a little more before shifting as well.

Any info is appreciated.

Thank you.

James

lkapimp216

iTrader: (2)

Haven t heard about too many tranny problems I have almost 70k and drive in S mode most of the time every once in awhile I'll have a late shift but it always is smooth have u ever changed the fluid in the trans or rear diff? I d try that first

lkapimp216

iTrader: (2)

Also want to add that cars adjust to driving styles if your usually hard on the car and then suddenly switch up and drive like an old bat then the car might be used to winding up more than your pushing it and have odd shift patterns

silverlexg

If you havent gone through a full fluid flush you are due by 100k. I'd recommend a full coolent, tranny, rear diff, power steering, and brake fluid flush/fill. Make sure to use the correct toyota fluids. I paid around 300 to have all of this done at 100k (also did it again at 200k).

You should also be concidering struts, timing/serpentine and water pump at 100k. I dont know if the 3rd gen has the 2nd gen issues with ball joints but those should be checked (2nd Gen GS's had weak lower ball joints). I know plenty of guys dont do it until things break but 100k maintenance is a good time to swap these items and keep things running smoothly.

jamessouza

Thanks for the responses thus far.

The GS300 uses a chain which is "life of the car" but I'll change it at 160K just to make sure.

The brake fluid was changed at 90K.

Power steering is electronic and no fuid.

I will definitely do a transmission flush and coolant flush on my 100K as it seems to need it.

Should I have the rear end serviced as well? Would this possibly make the gears feel like they are slipping as well?

Thank you for all of the info, it is appreciated.

jamessouza

UPDATE-Brake System Warning light came on

as well as Malfunction indicator lamp

and slip indicator light..

Transmission still shifting hard.

Does Pepboys do the free check for the 2006 GS models? They didn't have the computer to program my TPMS sensors...

uncandid

Why do you have 3 different posts for the same thing?

jamessouza

Any updates from anyone as to what this might be?

chicov8

gs300 timing belt not chain (gs350 timing chain)

Boron

Not on the V-6 2006 Gen 3 model it isn't.
430 was belt until it became the 460 with the new engine.

chicov8

isnt same engine as in 2gs just with few extra hp? (i know that 350 and 460 got chain)

lunatyk

iTrader: (20)

2gs i6 and 2006 gs300 v6

chicov8

thanks
i didnt know that

XxGoKoUxX

To further add, the i6 is a 2jz, and the v6 is a 3GR-FSE (direct injection). I did quite a bit of reading when I went shopping for a GS back 3 years ago.

http://www.mr2.com/files/mr2/techinf...a/3grfse-2.pdf

I'd also like to add, that JUST IN CASE, not that you NEED to do it, but just in case, since you're at 100k and you dont want anything to happen to the vehicle, i'd do a timing chain change. Toyota dealer usually reccomends their timing-chained vehicles to change at 90k intervals.

Also to note, the 3GR-FSE should be an interference engine, so if that belt snaps, your engine will "violate" one of the laws of physics

And yes, rear differential fluid should be changed. Mine's is sitting on the counter downstairs with the rest of my "Lexus" goodies ready to be changed.

my350z

iTrader: (2)

Replace the transmission fluid, I had a bad experience on this and ended up replacing the transmission for $3k.