No shift after atf fluid change

[rall275]

I've got a 1992 SE with an AT and here's what happened:

I changed out the transmission filter, what fluid drained, replaced the pan/gasket. It was on front ramps during the change.

Well, when I tried backing it off the ramps, it would not shift. I rolled it off, added fluid, but still no shift. I get it hot, run it through the gears via the shifter, but no go. Check of gauge shows full.

Any ideas guys?

[AZhitman]

This one's weird. I'm racking my brain to no avail.

My fear is an internal problem with your trans. Problems after fluid changes usually indicate a clog, a failed internal seal or failed solenoids in your transmission.

When you say "full," are you checking the fluid on level ground, in park, with a hot engine? It should be between the top and bottom marks. Overfill can cause issues as well as underfill.

[rall275]

Yes, level, hot, in park. I've read that the reading might not be accurate as the fluid may be drained from the torque converter a bit. I was crazy careful in the process. I'm going to take the pan off again, replace the filter/gasket. I'll check to make sure the o ring is seated properly. I read overtightening the bolts going through the filter could cause an issue, so I'll make sure that isn't the case.

Of all the projects I'm doing on this car, I didn't think a pan drain, filter replacement would lead to this debacle.

thanks for commenting