Are you sure you have or in drive and not 1st? Check the fluid level. If neither of those is the problem then your 22 year old truck probably needs a new tranny.
Check the transmission fluid level with the vehicle idling in park. If you do not see fluid on the dipstick then add one half quart at a time until it is in the hash marks on the dip stick. be sure to let the transmission (DexIII or mercon) completely drain down the dipstick tube or you will get a false reading. Shut off engine to avoid having to warm up the transmission to get an accurate reading and possibly causing (more) damage then may already have been done.
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Are you sure you have or in drive and not 1st? Check the fluid level. If neither of those is the problem then your 22 year old truck probably needs a new tranny.
Check the transmission fluid level with the vehicle idling in park. If you do not see fluid on the dipstick then add one half quart at a time until it is in the hash marks on the dip stick. be sure to let the transmission (DexIII or mercon) completely drain down the dipstick tube or you will get a false reading. Shut off engine to avoid having to warm up the transmission to get an accurate reading and possibly causing (more) damage then may already have been done.