What are the stock tranny gear ratios and torque capacities?
The following were available by year: Year Model/Opt 1st 2nd 3rd 4th 5th 6th Final —- ————- —- —- —- —- —- —- —– 1993 Manual/M28 3.36 2.07 1.35 1.00 0.80 0.62 2.73 (GU2) 1993 Manual/M29 2.97 2.07 1.43 1.00 0.80 0.62 3.23 (GU4) 1993 Auto/MX0 3.06 1.63 1.00 0.70 — — 2.73 (GU3) 1993 Auto/MX0 3.06 1.63 1.00 0.70 — — 3.23 (GU5) 1994 Manual/MN6 2.66 1.78 1.30 1.00 0.74 0.50 3.42 (GU6) 1994 Auto/MX0 3.06 1.63 1.00 0.70 — — 2.73 (GU3) 1994 Auto/MX0 3.06 1.63 1.00 0.70 — — 3.23 (GU5) The ’95s and later have the same ratios as the ’94s. Aside from the CAGS provision and different gearing/input shaft (on the post 93’s), all of the 6-speed transmissions are basically the same. Because of differences in the ratios, the torque capacities are different for each model. The shorter the tranny gear (higher numerically), the less torque it can handle. Note that these ratings from GM can be are considered conservative as they are most likely measured at normal load over 10
