95 3VZFE 3.0 Auto Transmission only shifts manually??

I have a 95 4runner 2wd with the 3.0 V6 and the auto transmission. Transmission will not shift at all on its own but shifts very smooth without problems when shifted manually through the gears. The O/D light also flashes.



I kinda doubt all the shift solenoids would go bad at once...is there a shift control module or sensor that could be causing this? Truck only has 145K and hasn't been abused at all.



Any help would be appreciated. Thanks!

Reply 1 : 95 3VZFE 3.0 Auto Transmission only shifts manually??

1MZFEfan,



Will it shift down to low and not up shift or does it stay in high gear making it difficult to move?

Reply 2 : 95 3VZFE 3.0 Auto Transmission only shifts manually??

When you first put it in D it starts out in either 2nd or 3rd gear making it impossible to move. You have to put it in 1 and manually shift it through to D. I don't believe it is using Overdrive either. It has shifted down maybe once or twice on it's own but it won't up shift at all on it's own.

Reply 3 : 95 3VZFE 3.0 Auto Transmission only shifts manually??

make sure your throttle postionns sensor is hooked up. I just did a engine swap and had the same problem and tht was the issue. forgot to plug it i. so if it comes undone or is bad then that will be ur issue. is u check engine light on?

Reply 4 : 95 3VZFE 3.0 Auto Transmission only shifts manually??

hi i got same truck the same problem too.. i got code #42 (vss n0.1) .. but everything works on my speedometer.... ive change the vss on tranny still the same thing.. i'm wondering if its just the cable or do i have to change my speedo? help pls.

Reply 5 : 95 3VZFE 3.0 Auto Transmission only shifts manually??

Quote:

Originally Posted by 1MZFEfan ... The O/D light also flashes.

That's telling you a trouble code has been stored in the ECM, read it and go from there.

Reply 6 : 95 3VZFE 3.0 Auto Transmission only shifts manually??

Quote:

Originally Posted by Mantis hi i got same truck the same problem too.. i got code #42 (vss n0.1) .. but everything works on my speedometer.... ive change the vss on tranny still the same thing.. i'm wondering if its just the cable or do i have to change my speedo? help pls.

That VSS is part of the speedo, but it doesn't affect operation of the speedo. I don't think it can be replaced except by replacing the speedo.