2003 Gs300 Transmission issues
#1
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Thread Starter
2003 Gs300 Transmission issues
I've got about 126k on my gs300, and the transmission has gotten worse and worse in the last 10k miles. usually the first issue is that if not warmed up for a while, the car would not shift from 4th to 5th unless i gave it a harder throttle. i would sometimes even have to put it in manual, drop it to third, and then shift back up to 5th just to get it to go. (number said it was in 4th though)
anyway the new issue is harsh jolts into gear from 1st gear. some harsh shifting to 2nd sometimes, and the rest are flawless. if driven very lightly, after the initial jolt when hitting the gas, i could get the rest of the gears to shift smoothly.
it seems to hesitate a lot, and the car even feels very sluggish and unsure. its like the car isn't sure about what gear to put it in, when rolling from a stop. sometimes i have to punch it around a corner just to get the damn car to move.
i was thinking that i would do some sort of tranny flush or something to start. but my second thought was that maybe the transmission solenoids might be sticking. i know i had to replace one of those on my Ex wife car (ford fusion, 120k miles).
the only thing about that was her car was giving that code off. my car is not giving me any flashing lights or any warnings or codes. (not that i have plugged it in randomly, but wouldn't it give me some type of dome light?)
Any thoughts or tips on what to check?
anyway the new issue is harsh jolts into gear from 1st gear. some harsh shifting to 2nd sometimes, and the rest are flawless. if driven very lightly, after the initial jolt when hitting the gas, i could get the rest of the gears to shift smoothly.
it seems to hesitate a lot, and the car even feels very sluggish and unsure. its like the car isn't sure about what gear to put it in, when rolling from a stop. sometimes i have to punch it around a corner just to get the damn car to move.
i was thinking that i would do some sort of tranny flush or something to start. but my second thought was that maybe the transmission solenoids might be sticking. i know i had to replace one of those on my Ex wife car (ford fusion, 120k miles).
the only thing about that was her car was giving that code off. my car is not giving me any flashing lights or any warnings or codes. (not that i have plugged it in randomly, but wouldn't it give me some type of dome light?)
Any thoughts or tips on what to check?
#3
Advanced
Hook it up to a scanner/reader, and check if any codes are pending. Sounds like a solenoid issue. I'm replacing my Solenoid C real soon, just got the part from Sewell. Seach P0763 here and read about it.
Last edited by wbmx1981; 02-12-14 at 10:28 AM.
#4
Pole Position
Thread Starter
What about valve adjustments? could the VVTI be messing up?
Thank you guys, im freaking out so much im about to buy a new car lol
#5
Racer
iTrader: (8)
The solenoid issue typically plagues the 98-00 models. I haven't seen or read of an issue with the 01+ models. Do you have any service history of the tranny? Have you changed the fluid ANY since you owned it? My old car tranny wouldn't shift out correctly if the fluid wasn't warm.....but that car had 250k miles on it. As far as drain and fill, I'm able to get a constant 3qts out when I drain because I place my car on high incline ramps to drain. Most people only get 2qts out each time.
#6
Pole Position
Thread Starter
The solenoid issue typically plagues the 98-00 models. I haven't seen or read of an issue with the 01+ models. Do you have any service history of the tranny? Have you changed the fluid ANY since you owned it? My old car tranny wouldn't shift out correctly if the fluid wasn't warm.....but that car had 250k miles on it. As far as drain and fill, I'm able to get a constant 3qts out when I drain because I place my car on high incline ramps to drain. Most people only get 2qts out each time.
#7
Pole Position
Thread Starter
just pulled the MAF sensor. it was very dirty. cleaned it all up and put it back in. hopefully on my drive home from work a few things are running better. but i definitly have to figure out my trans problem asap.
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#8
A real flush with a pressurized machine is good. Slog with a filter change too. I'm gonna add a magnetic inline filter onto mine.
Maybe adding an inline filter would help clear yours up as well. They're cheap and definitely worth a try
Maybe adding an inline filter would help clear yours up as well. They're cheap and definitely worth a try
#9
I always hear people say that the complete FLUSH on high mileage is bad and can break up sludge chunks and all that. Is there anyone on here that has actually done the full trans flush on a high mileage GS and can comment here?? Because others say the way the Lexus trans is built that its actually ok to do the flush.
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