1994 Auto, changed fluid, now no 2nd gear, hard to upshift

[lvin4jc]

I added a transmission fluid temp gauge today. I decided to install it in the side of the pan. So I dropped the pan, installed the sending unit out of the way of internal components, put a new gasket on and re-installed the pan.

When I first started tightening bolts I heard a plastic click. I figured it was something just settling and didn't worry about it. But when I put new fluid in it and test drove it at the proper level it didn't want to upshift. You have to rev it up a bit and then let off the gas and then it will upshift. It's worse uphill and may be worse when warm?

So I dropped the pan again to see if I broke something plastic. I don't see anything wrong visually. There are two solenoids on the front drivers side of the trans. The rear of those is a BOSCH 0260120008, the outer cap where the wires attach can be wiggled a bit from side to side but the solenoid itself stays firmly in place. The wires look good, I see nothing else wrong in there.

So I put the pan back on, re-filled it and same thing. I also noticed that there is no 2nd gear, it goes from 1st to 3rd.

I can think of two scenarios, maybe you can add more?

#1. The solenoid is broken and it controls the broken functions i'm experiencing.

#2. New transmission fluid made it upset and messed with another internal component that is causing these issues.

#3. Do you have another theory or think one of the two I listed is correct?

Thanks.
Joe

 

[transman304]

#2, the 2 solenoids are for lock up and OD (4th gear). Won't have anything to do with no 2nd gear. Can I ask why you installed a temp sensor? What did the fluid look/smell like you drained out? Was there debris in the pan or on the magnet?

 

[BrooklynBay]

Did you accidentally snag the kickdown cable? The base with the adjustment under the hood makes a clicking noise like a ratchet. Is the vacuum line still connected to the vacuum modulator?