4L30E - Used 1990-up.
There are MANY versions and are used in the Cadillac Catera as well many Foreign vehicles (we say Isuzu here) and Postal trucks.
This is a computer controlled overdrive transmission except in the very earliest designs and model application
Rear cooler line is the cooler return line.
Band adjustments: Intermediate = not used Reverse = 5 turns
Gear Ratios: 2.40:1 1st gear 1.479:1 2nd gear 1.00:1 3rd gear 0.723:1 4th gear 2.00:1 reverse
Optional Gear Ratios: 2.86:1 1st gear 1.62:1 2nd gear 1.00:1 3rd gear 0.723:1 4th gear 2.00:1 reverse