A340H Slipping.

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TwelveGravity

TwelveGravity

Joined
Jan 2, 2014
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Location
Bakersfield, CA
I'm trying to look into a few things for my brother. I don't know a whole lot about the 4runners so Im turning to Mud.
1991 Toyota 4runner with the 3.0V6 and an A340H automatic transmission. Recently purchased an imported 30k mile transmission and put it in, did not put any ATF in the torque converter before installation. Added 1 gallon of DEX/MERC ATF. He took it out this morning and got nothing but a bunch of slip. I wasn't with him so I don't know exactly how it was acting. While he is working now, I want to look into troubleshooting. I read somewhere to unplug the Park/neutral safety switch and try driving it by shifting manually to troubleshoot possible electrical issues. I will try this but first I would like to know if NOT adding ATF to the torque converter prior to installation will cause an issue and what I need to do.

Advice is greatly appreciated.
Thank you.
 
TwelveGravity said:
I'm trying to look into a few things for my brother. I don't know a whole lot about the 4runners so Im turning to Mud.
1991 Toyota 4runner with the 3.0V6 and an A340H automatic transmission. Recently purchased an imported 30k mile transmission and put it in, did not put any ATF in the torque converter before installation. Added 1 gallon of DEX/MERC ATF. He took it out this morning and got nothing but a bunch of slip. I wasn't with him so I don't know exactly how it was acting. While he is working now, I want to look into troubleshooting. I read somewhere to unplug the Park/neutral safety switch and try driving it by shifting manually to troubleshoot possible electrical issues. I will try this but first I would like to know if NOT adding ATF to the torque converter prior to installation will cause an issue and what I need to do.

Advice is greatly appreciated.
Thank you.
Click to expand...
I'll start by saying I m not an expert... As long as there is air in the torque converter you will get "slippage". After a while it should smouth out. Keep an eye on fluid level, as the air bubbles out you may need to add more.
 
ClevSix said:
I'll start by saying I m not an expert... As long as there is air in the torque converter you will get "slippage". After a while it should smouth out. Keep an eye on fluid level, as the air bubbles out you may need to add more.
Click to expand...


Thanks, I will keep that in mind.
The service manual states that the A340H takes 9.6 pints of fluid but I don't know if that includes the torque converter capacity.
 
So I added about a quart of fluid and took it up and down the street. It really feels sluggish in 1st from a stop. I unplugged the Park/Neutral safety switch and pulled it down into first, driving down the block it was sluggish from a stop, and didn't seem to go to 2nd when I moved the shifter. Maybe it wasn't ready for it yet but the speed and RPM range in 1st gear seemed pretty tall. It really feels like it is starting from 2nd gear yet should always start in 1st from a complete stop . I think?? I was well over 30mph with the shifter back into 1st, or what I thought was first. When holding the shifter all the way back in 1st, I would move it forward only twice and would hit neutral. Should be three positions correct?
L, 2nd, Dr, Neu, Rev, Park. There is so much slop in the floor shifter also. No telling if its pulled all the way back into LOW, but then again it should automatically start off in the lowest gear from a complete stop? Or am I missing something?
 
Is there any codes? It could be the shift solenoids
 
Near the battery or fuse box there is a diagnostics box. Open the cover and take a paper clip and connect T1 and E1 together. Then with the ignition on the start the check engine light will flash, those will be your engine codes. Since you have an automatic transmission the over drive light will flash as well, those are you transmission codes. To get the code number is simple, you watch whatever light is flashing and let’s say it flashes twice, there’s a 2, then there's a pausing and it flashes twice again. You have code 22.


Here's a good tech article, another way to get codes would be to type into Google "Toyota 3.0 code ##"

Transmission Codes:
A340 Transmission issues and FAQs - Pirate4x4.Com : 4x4 and Off-Road Forum

Engine Codes:
Toyota – OBD Trouble Codes
 
So I just Jumpered TE1 & E1, checked the codes and if I am correct .. On the transmission I'm receiving 62, 63, 64 & 65.
I found 2 codes online that referred code 62 to solenoid #1 and code 63 to solenoid #2.
Before I go breaking into things is there something I should check first , having tripped so many codes. By replacing the transmission do you need to have the ECM flashed ? Just thinking ....
Thanks.
 
Open the fuse box and pull the square 15 amp efi fuse. Wait about 15 seonds, then reinstall it and take the truck for a drive and pull the codes again.
 
ftbshop said:
What's your fluid level on the dipstick when cold? That 9.6L figure could be without T/C fluid. Now that its circulated through, the fluid level could have dropped.
Click to expand...

Initially when I checked it before moving the 4runner, the oil hardly registered on the dipstick. I added just over a quart and drove it around the block a few times. It still felt sluggish from a stop. I got underneath again to inspect the linkage and and found the connecting rods in the shift linkage bound against the side of the transmission preventing the arm on the transmission itself to move fully into place. It was held right in between Low and 2nd gear. I cleared the bind and set the linkage correctly on both the transmission & transfer case as it would not stay in 4low.
I pulled the 15amp EFI fuse as suggested above while working on the rest of this. After fixing the combination of things I took it out and it feels better. I can feel it start off in 1st, you can feel it changing gears without slipping between and I can get up to a decent speed without racing RPM's. I can feel it downshift as I drove around. It doesnt feel like a muscle car right off the line and takes a little to get up to any sort of cruising speed but Im sure thats expected. So I dont know for sure if the problem had to do with the combination of all the above or if it is even in fact fixed 100% but I can say that it feels much better, no slip and takes off from a stop without riding 4000rpm. One thing that I still scratch my head about is NOW from a stop it will start out in 1st geat with the shifter in DRIVE. Where as before it wouldnt or at least felt like it was pulling off in 2nd gear. Could this be from the lever on the side of the transmission being stuck between Low & 2nd?? Not sure.
Also as of now the linkage is reset but I still cannot pull the lever all the way back into Low, and i believe it is from the plastic center console & slop in the shifter restricting it from going all the way back.
 
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