Sounds like it is shifting as if there was a shift kit installed. Have it checked at a transmission shop before more damage occurs. Possible also that the mounts are broken.
4L60E Transmission.
300
They were not used on that year model. The 93 transmission is computer controlled. Time to take it to a transmission shop.
Yes.
YES they are.
synchros are pooched
Dexron II, IIE or III ATF TRANSMISSION FLUID
I didn't know there was one.
That year did not have 1. No need for 1 because it is computer controled
Electric? Put transmission into neutral prior to shifting into 4wd Low
NO.You can only use a 93 or 94 only
Sounds like there is a problem in the transmission and the computer has put the transmission into the FAIL SAFE MODE to keep it from blowing apart. Stop driving it and get it to a transmission shop ASAP.