A341 1UZ MX83 Auto Shifting Issues (LIMP?)

[moonman]

Hey Guys,

I've just put a second hand A341 in my MX83, but I can't get the auto out of first gear.

When in L it will hold first and have engine breaking (TC Lock-up)
Drive holds first, but angle gears down, no TC Lock-up.

I've disconnected the Solenoid plugs, and I get manual shifting through the T-Bar, but can't get it to work with them plugged in.
I've recently fixed the Overdrive Light, and engine warning light so I can get the codes, but there aren't any being produced.

Are there any further tests I should be doing before I start assuming the solenoids have failed?
This auto has/could have been sitting for a number of years on a shelf, could that cause the solenoids to stop working/lock-up?

I have confirmed the SPD signal and speed sensors are working (Disconnect them and get codes), the dash lights for shifting are working, and the speedo is working.
This was shifting fine before I changed the auto.

I've also had a very knowledgeable dude come around and checkover the conversion (As I braught it like this) and allthough its not clean, we can't find anything that would be causing this.

Any idea's?

thanks.

[madmont]

What motor/transmission combination do you have?
MX83 would have a A340e 1Uz would have a A341e
I do not know what an A430 belongs to

[moonman]

What motor/transmission combination do you have?
MX83 would have a A340e 1Uz would have a A341e
I do not know what an A430 belongs to

I'm fairly sure the box is from the donor car (LS400), and we replaced the box like for like (Visually inspected to be the same)

Is there any way I can confirm the box type with it in the car? If not, I'll have to assume that its the A341e.

[madmont]

All you have to do is look at the plate on the side and you can see the model number and part number.

[moonman]

thanks, I'll have a look shortly and let you know. I assume there is different behaviour between the two models?

thanks for your help mate.

[marvis]

Could also be a speed sensor. I have had this problem a few times and it has been the 1-2 shifting solenoid and another time there was a bad connection between the first speed sensor.

[moonman]

All you have to do is look at the plate on the side and you can see the model number and part number.

The Model No. is: 30-41LE

I confirmed the old box was the same model, it is.
I don't understand how that can come out at A340e or A341e

Can someone confirm?

I've checked the speed sensors by disconnecting them, I loose dash speedo and get Auto Error codes, so I don't think its that.

[marvis]

You will need to put the a340 valve body in the a341. Do a search on it. I recently did it on mine, easy stuff. It's a much stronger box then the A340 also. Did you swap the torque converter etc also? They are much bigger.

[moonman]

You will need to put the a340 valve body in the a341. Do a search on it. I recently did it on mine, easy stuff. It's a much stronger box then the A340 also. Did you swap the torque converter etc also? They are much bigger.

Sorry, I don't know what you mean, the box that came out is exactly the same model as the one I put in.....Wouldn't that imply that the valve bodies are exactly the same?

the torque converter is the original one before the change -- as I only gave the shop the actual box, nothing else.

[marvis]

They are different valve bodies, A340 is much more simple, A341 has a computer to control gear changes etc There is plenty of info on here showing the differences.

[moonman]

They are different valve bodies, A340 is much more simple, A341 has a computer to control gear changes etc There is plenty of info on here showing the differences.

Sorry, but are you reading what I'm saying??? I've taken out a A341 and replaced it with a A341.

I can understand that an A340 and A341 are different, but I havn't used an A340... I'll change the topic subject.

The Model No. is: 30-41LE

I confirmed the old box was the same model, it is.

[marvis]

My apologies. I was confused by the title.

I would check solenoids, do you have the old ones?

[moonman]

No worries mate, all good.

I have access to the old ones, but not currently. Are you suggesting that they might be locked/not shifting.. Wouldn't that throw error codes?

[dnegative]

Correct me if I'm wrong but is there not a transmission ECU in the boot of MX83?
I know fuck all about Toyota auto's so that's the limit of my knowledge lol

[moonman]

Correct me if I'm wrong but is there not a transmission ECU in the boot of MX83?
I know fuck all about Toyota auto's so that's the limit of my knowledge lol

With the stock engine/Auto maybe, not sure.

This has a 1UZ-FE in it, their ECT ECU is physically in with the Engine ECU, pins mixed and all.... In my case, in the front passenger seat. lol