Jmoore4

im having the same problem but slight the opposite i have a throttle body problem and mines hard shift first and second gear once the throttle goes out but when the throttle is fine it doesn't jerk at all i put it on the scanner and got the Po763 code to but i still have all my gears

wbmx1981

You can get the new solenoid from Sewell Parts. It's fairly easy to replace.

Black1129

Does anyone have pictures on how to bend the solenoid back. Cause I have the same problem with the code and at the same time if I were to hit a nice bump it'll shift smooth afterwards and then my M mode will start to work again. Then it'll go back after awhile and start to shift hard and M mode would flash. So I'm assuming its a bad connection. (Is300)

wbmx1981

It's not a bend per say but more of a slight movement of the connection prong. Actually, cleaning and bending it only worked for a few weeks then it came back. I had to re-drop the pan and do all the work over again. I'd just get the new part because there is a lot of work involved to do it twice.

miz2jz

Thanks to everyone who has posted on this thread! i have the same code (P0763) and i was ready to buy a new solenoid and see how much my local mechanic could fix it for but thanks to you guys i think i'll try everything else first before resorting to changing it completely out!

miz2jz

Question...when you get a P0763, it can be the following:

1. The ECM (main engine computer)
2. The wiring harness from the ECM to the solenoid
3. The solenoid itself (the P0763 states that the solenoid is either electrically "closed" or "open", that is, it's either shorted (stays on when it shouldn't) or has an open loop (i.e. it won't turn on when it's supposed to due to a break in the circuit)

I plan on doing a complete tranny flush, cleaning the pan and magnets and the solenoids, BUT has anyone done all the following and changed the solenoid(s) and found it to be either the ECM or the wiring harness??

wbmx1981

No not in my experience, it was never the wiring harness or the ECM.

GSGenesis

Although this is somewhat of an old thread, I have to quote this guy.... Your story is truely a hit. I swear to you it's almost like a scene out of some gun slinger movie, John Wayne and his crippled horse, all wounded
gimping though the desert, then suddenly, a water hole! The horse gets a fresh sip of Trans fluid, and suddenly! DA DA NA NAAAA NA NAA NAAA!!!! (Or wait no, that's Indiana jones huh my bad...)
Whatever sounds good:

But anyhow that's an awesome story you made up there... Woulda been better if it was true... Can't imagine how good that must have felt.... Probably breath taking...

GSGenesis

Thinking if I've got the time right now.... If I should do this procedure for preventative reasons... Just drop the pan, clean all the sensors out, filter and what not, and new Trans fluid flush. But what did you guys do, drop the pan, clean it all, then flushed it? God I hate the idea of having to run whatever fluid that's still in there, which is a lot, though all the freshly cleaned parts durring the actual flush.... Yea it's going to get flushed out, but dam... Wish we could get all of it out first, and do a complete fill somehow... To bad... But what you think? Clean her out? She has started to feel a little slippy lately I got to say

GSGenesis

Not talking from experience, but I don't see the harness or ECM causing that code before those noids do... No chance.... If you've got the code, and it's your harness or ECM after doing this all, I'll tell you what, give me a video of proof you did it all, and I'll give you an ECM and harness k. Mark my word.

Champstar

I am having the same issue. My Gs400 doesn't move once I press the gas, then jumps to 3rd gear. The CEL is on, but I get the P0753 (Solenoid A) instead of P0763. I will get new filter installed and drain and refill tomorrow and report back.

Black1129

Soooo anything different?

wbmx1981

Dude if you're going to take all the time, effort and money to drop the pan, replace the filter and refill with fresh ATF, you might as well replace the solenoid. While you're there you might as well replace the 3 rubber gaskets that are around the filter. Btw, the filter is a wire mesh, I just made sure mine was clean, I reused it. Look at the diagram in the thread. Sewell has all 3 solenoids for sale on the site, they all must be common issues on the 2GS.

Champstar

I did not change the filter, instead did a drain and refill. The problem seemed fixed, but for only the first 20 miles and came back. I'm thinking about doing another drain and refill, and adding some lucas transmission stop slip additive. I've done some research and see it has worked great in the past for some. I spoke with Lexus and the solenoid is $368! (Same cost of a used transmission). I can't find it anywhere else online. Can you post a link to the site or pm me? I see solenoids for the A340E, A340, AW4 on ebay for $60 bucks. But nowhere can I find the one for the A650E?

wbmx1981

I paid 271.87 from sewell with the clublexus discount, on the site type in your clublexus user name in the promotion code line. It's worth every penny. My problem got solved by breaking down and just getting a new part. I tried everything and nothing worked. You can drain and fill "till the cows come home", but that will not fix it.