The linkages on a 350 Turbo transmission is adjusted by lessening the connector and moving it in either direction. This controls the point at which the vehicle shifts when the lever is moved.
Thats fairly easy to do. First block the wheels so the vehicle will not roll. Put the transmission into neutral. Go under the car and on the drivers side of the transmission pan you will see the linkage. Remove the pin holding the linkage to the transmission. The linkage should slide in and out of the transmission shift bracket easily. If not loosen the nut on the linkage and adjust it until the linkage slides in and out without binding.
Check the shifter linkages and adjust if needed. The linkage may be in d2 when the indicator shows drive.
Is there park and nurtural?
you do not have a neutral safety switch it is a valve in the gear box adjust the linkage put in first gear now to the engine bay look at the throttle now adjust the linkage see if gearstick is in the right place the engine must only start in park or neutral if not you must adjust the linkage.
Sounds like you need to adjust the linkage.
None, TH stands for turbo-hydromatic, hence th350 or 350 turbo.
Which linkage.
turbo 350 or 700r4 turbo 350 or 700r4
What linkage?
yes a 350 turbo converter will fit a 400 turbo and vice versa
yes, same bolt pattern. Chances are the 455 buick had a turbo hydromnatic 400 transmission, hopefully that is what your 350 had. If not, crossmember, driveshaft and linkage will all have to be modified or changed.
No turbo 350's in 1992.