On a 4g64. Spordically occuring, upshifting was not engaging the next gear. Usually from 2-3 or 3-OD. Switching from drive to neutral then back to drive usually made the next gear engage. Sometimes it would grab choppy. My wife drove like this for a week.

No codes. I decided not to try the neutral trick to see if the ECU with throw a code and received a P1750=solenoid assembly. So, I have a new solenoid on order.

Will a new solenoid solve my problem? What's involved in the replacement. I'm assuming, remove the pan and it's accessible. I hope I don't have to drop the tranny or remove the valve body. Is there a online tech article?

zumo said:

No codes. I decided not to try the neutral trick to see if the ECU with throw a code and received a P1750=solenoid assembly. So, I have a new solenoid on order.

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So what is the neutral trick you are refering to? And if you didn't use it what finally gave you the error code for the solenoid? Thanks!

Just what I described above. Switching to neutral then back to drive. I think the code appeared because the transmission failed mutiple times before shifting. Before, when shifting to neutral then back to drive, the trans didn't fail enough to display a code.

My Spyder has had that same code since I bought the car, and gears 2-3 slip with moderate to heavy throttle. Im conclusive that it is related. Let me know if this fixes your problem, and how tough it is to install.

Basically what is involved with a solenid swap is that you have to remove the valve body from the trans, unbolt the solenoids and then find where the harness is seated in the transmission on the outside. You will have to unhook it and then feed it through the pan area to fully remove everything. It is somewhat of a pain in the ass but nothing too complex. Basically just remember where each color wire went on the valve body and reverse your disassembly.

Thanks RuBiCaNT5X for the help.

It was very easy. In case someone needs the disassembly procedure:

disconnect battery
drain transmission fluid
remove pan
pinch harness grommet outside of housing and push into housing
remove intake from throttle body to filter
remove the three 10mm bolts in the foward filter box, this allows it to be rotated giving more room
remove tranny filter x4 10mm
follow solenoid wiring harness to connection on top of tranny, disconnect and remove from mount
remove valve body, about 4 10mm bolts
unbolt the 4 solenoids and grounds x10 7?mm making note of position, yellow, orange, red... harness

This solved the slip from 2-3 but not the slip from 3-OD.

I bought the end clutch kit from IPT, this solved the 3-OD problem

How much did you end up paying for the solenoid? Did you get it at a dealership?

Thanks for this info, it's what i've been looking for. I've got that darned slight 2-3 slip and the same trouble code you had.

spyder97gs said:

How much did you end up paying for the solenoid? Did you get it at a dealership?

Thanks for this info, it's what i've been looking for. I've got that darned slight 2-3 slip and the same trouble code you had.

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Yea dealer. Got it from Mentor Mitsubishi online.
http://trademotion.com/partlocator/index.cfm?siteid=213934

Don't remember the part number, it's at home. Cost $260 ish, the dealer here wanted to charge me $360 for the part.