What manual 5 speed transmission came in a 1991 Chevy s-10 2.8L V6 TBI truck?
The 1991 Chevy S-10 2.8L V6 TBI truck used a BorgWarner T5 5-speed manual transmission. There may have been slight variations within the T5 family depending on specific options and gearing ratios, but the T5 is the correct designation.