Transmission Specifications
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