Searched and found almost nothing on this, and yes I did read the thread from another member about his same issue, it still had little information.

Basics: 2008 IS250 RWD, 65,000 Miles.

• Car will only shift up to 3rd gear
• Pulled code P0751 - Shift solenoid A stuck in OFF (I think?)

New transmission is $2800 + Labor from Lexus.

Does anyone have any info regarding this? I understand the solenoid sits inside the transmission. Can they be purchased and replaced? Or will I be needing a full rebuild?

 

i had kind of a similar issue. mine would shift down on its own with the throttle steady. i would drive about 30mph and car would shift 2nd to 3rd then right a away shift back to 2nd with out steping on gas. i work at a toyota dealership and the mechanics a scan tool and i belive that code pulled up.. so they checked and there was a TSB. so all my car needed was a computer reflash and update to a new version and that fixed it.

 

take it to the lexus dealer and ask them to check for a tsb

 

I'd have to drive 30 mins for the closest Lexus dealer.
Because it stays in third, driving a far distance is not something I wish to do.
Looks like I may have to tow it.

 

What model and yr is your 2IS? Do you have the TSB ID #?

 

The solenoids can be replaced inside of the tranny. Its a dirty job. If you have to pay for the labor you might as well just buy a used tranny from a junkyard as it will likely be cheaper than opening up your tranny, replacing solenoids and hoping it fixes the issue(s). :/

 

No but I can get it tomorrow when I go to work and mines a 2006 is250

 

Wow, is it really that extensive? From the diagram (sewellparts.com), it looks like the solenoid sits in the valve body, which is likely underneath the transmission. Ah, I don't know, I'm just looking at diagrams and making guesses. I'm going to take it to a transmission shop today for a check.

 

Update:

Took it to a transmission shop. Technician drove it around, pulled OBD codes, then reset the light. Now it works perfectly. WTH?

 

^That's good to hear!

 

that what i did, temporary fix for me but it came back 2 days later. I unplugged the battery and plugged it back in..

Mine used to get stuck in third gear. Now its stuck in 4th. Better I guess. Hoping mine wont crap out on me within the next 2 months. Gonna finish school before I fix the problem.

 

Hmm.. really?? Does your tranny still drive smooth in the mean time?

I was quoted $2100 for rebuild with 12-months warranty.
Does that sound pretty reasonable?

 

I was quoted if I'm lucky 700 for the solenoid if that doesn't fix it 1700 for rebuild or 2100 for a tranny swap with 50k miles on it.

 

My transmission guy won't warranty a used junkyard transmission. He will only warranty if it he rebuilds it himself. Which is reasonable to me. He said $400 labor if he installs a used tranny, $2100 if he rebuilds.

 

I had the transmission solenoid replaced and it's fairly inexpensive.