code p0743 help!!!

[sbiddle]

I have everything working on this '98 neon except for a shutter at idle along with a DTC p0743. This refers to a torque converter solenoid problem of some kind, but how can I diagnose this. Can I assume that the shutter (maybe caused by low rpm) is due to the torque converter locking up when it shouldn't be? Also, what do i have to do to replace the solenoid? Do I have to drop the transmission? Is it time for a junk yard swap?

Thanks in advance for your thoughtful ideas!

[das2123]

This may help...

Originally Posted by Armurp01

Hi, Ive messed with this code plenty of times before so this is what you will have to do. More than likely if it keeps coming back on then your TC solenoid is going bad and will have to be replaced. The TC solenoid sits on top of the valve body inside the tranny. You are going to have to drop the tranny pan, take the valve body out, and replace the TC solenoid. Also if your doing this your self I would go ahead and change the tranny fluid too because you will lose most of it while doing this task.

[BlazerLT]

The shudder at idle is more than likely your front motor mount going bad.

My 1998 is bad and will be replaced ASAP.

[sbiddle]

How can I tell if it's the front mount or not? The mount looks ok.

[xtreme barton]

have someone hold the brake and shift through gears while you watch the engine. excessive engine play is pretty easily noticed.

[BlazerLT]

You will have to look through the rubber mount and look for tearing.

All stock front mounts will wear out between 60,000-100,000 miles guaranteed.

[sbiddle]

Originally Posted by BlazerLT

You will have to look through the rubber mount and look for tearing.

All stock front mounts will wear out between 60,000-100,000 miles guaranteed.

I took the front mount off and sure enough it was torn. I've ordered a new one which will be here Tuesday. I'll post how it turns out. I also ordered a new lock-up solenoid due to the p0743 code. Hopefully this will complete the repairs on this car. You guys are the best! The help has been great!

[BlazerLT]

Glad to have helped you.

Tell us how it goes.

[sbiddle]

Well, the shudder is still there after replacing the front mount. I did get rid of the CEL after replacing the torque converter lock-up solenoid. The tranny continues to shift a little funny, like it switches between 1st and 2nd a lot and also revs pretty high in 1st before shifting to 2nd. not sure what to do next. I've sunk some pretty good $ into this so far.

[das2123]

How is your fluid level? What fluid did you put in there?

[BlazerLT]

Bands need adjusting.

http://www.neonspeed.com/howto/howto...atxbandadj.htm

[sbiddle]

Do you think it's the kickdown band or the low/reverse band? I did adjust them when I had it all apart, but I might of screwed it up somehow. My torque wrench doesn't accurately measure torque levels that low.

Sometimes I don't think straight when I'm flat on my back looking up at those red drips coming at me.

[das2123]

Originally Posted by sbiddle

Do you think it's the kickdown band or the low/reverse band? I did adjust them when I had it all apart, but I might of screwed it up somehow. My torque wrench doesn't accurately measure torque levels that low.

I doubt it's your bands, but it would be the kickdown band not the reverse band. What fluid did you put in the tranny?

[sbiddle]

Originally Posted by das2123

I doubt it's your bands, but it would be the kickdown band not the reverse band. What fluid did you put in the tranny?

I used ATF 3+, 4.5 qts. Normally I would have added just 4 qts per spec, but since I had the valve body off, about a half quart drained with that. The level is right where it should be.

[das2123]

Originally Posted by sbiddle

I used ATF 3+, 4.5 qts.

Mopar ATF+3?