Transmission troubleshooting?? where can i find the tranny diagram (schematics) for a 92 taurus 3.8

Not normally. The clutch slave cylinder is externally mounted. Get one or the tyre chains to change it.

https://www.mycarspecs.com/cost/geo/storm/1992/3-dr/clutch-slave-cylinder-replacement-cost

https://www.google.com/search?q=92+geo+storm+replace+clutch+slave+cylinder

..

See 3 fuses in upper left of diagram. These are in the box under the hood.

I looked at info for 92 chevy c1500 pickup--5.7L engine, automatic. My database on that model year, won't say, Silverado.
I'm not a tranny person, I doubt you can totally drain the tranny and the torque converter has fluid. I don't like to change tranny fluid on older vehicles, I've seen too many people have problems. If the specs aren't correct, blame the database, not me. Keep an eye on your tranny dip stick.

Here is a link to an image of a 92 Ford Taurus w/ 3.0 L V6:

https://www.bing.com/images/search?q=92+ford+taurus+3.0+liter+belt+diagram&view=detailv2&qpvt=92+ford+taurus+3.0+liter+belt+diagram&id=1506A7C7D19C3D2C363E9CB094A7FE868F24704A&selectedIndex=10&ccid=tXftPJPP&simid=608017299768673961&thid=OIP.Mb577ed3c93cfb5b8471497c5056eeedco0&ajaxhist=0

Serpentine belt diagram 2002 ford taurus 3 0 2002 Ford Taurus
should be the same for 2003

You might need to replace the valve body clip with the upgraded (stronger) one. Ford had problems for a while with the clip breaking and not allowing the tranny to shift into O/D. I had the no O/D problem, I replaced the clip with the upgraded (stronger) one which fixed the problem.

fix with this kit
Sonnax 96206-07K AX4N 4F50N Transmission forward control valve, Transmissionpartsusa.com

Below are the DTC codes if it has any. ISSUE
No 4th gear operation (no 3-4 shift) and Diagnostic Trouble Codes (DTCs) P0734 and/or P0761 or 648 may occur on some vehicles.

You may want to change your transmission fluid and filter for a start

Hi, from your description, it sounds as though you have a valve body problem in the transmission. Burnt fluid could possibility mean deterioration of the clutch packs, which would shed material and then that material would be lodged in the super fine clearances of the valve body.

I would bet that is the oil pan of the transmission were removed, one would find a lot of foreign debris, indicating the demise of the transmission.

If you would like to correspond further with me on this or any other issue, please feel free to do so.
Bill
ASE Master Technician

you need to get a new transmission control module, i had the same problem when i bought my 92 from the auction, i wouldn't shift from 1st to 2nd, so i found a rebuilt unit on the internet and it corrected the problem, you also might want to remove the excess tranny fluid that every one put's in when they have a tranny problem.

dismantle it entirely