The General Motors 4L30E 4-speed automatic transmission was produced in France from 1988 to 2004 and installed in many BMW models of its time under the designations A4S270R and A4S310R. This automatic transmission was also found in Opel vehicles and the Cadillac Catera under the designations AR25 and AR35.
Specifications
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | rear / all wheel |
| Engine volume, l | up to 3.5 |
| Torque output, Nm | up to 350 |
| Recommended oil | ATF Dexron VI |
| Oil capacity, liter | 8.7 |
| Partial replacement, liter | 4.5 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~300 000 km |
| Weight, kg | 77.3 |
Gear ratios GM 4L30E
Using the example of a 2000 Cadillac Catera with a 3.0 liter engine:
| Main | 3.9 |
| 1st | 2.856 |
| 2nd | 1.618 |
| 3rd | 1.000 |
| 4th | 0.723 |
| Reverse | 2.000 |
Using
The transmission was installed on:
- Acura SLX 1 (DJ5) in 1995 – 1999;
- BMW 3-Series E36 in 1990 – 1999;
- BMW Z3-Series E36 in 1995 – 2000;
- BMW 5-Series E34 in 1990 – 1996;
- BMW 5-Series E39 in 1996 – 1999;
- Cadillac Catera 1 (GM2800) in 1996 – 2001;
- Honda Passport 1 (C58) in 1993 – 2002;
- Isuzu Amigo 2 (UE) in 1998 – 2001;
- Isuzu Axiom 1 (UP) in 2001 – 2004;
- Isuzu Rodeo 1 (UC) in 1990 – 1998;
- Isuzu Rodeo 2 (UE) in 1998 – 2004;
- Isuzu Trooper 1 (UB1) in 1990 – 1991;
- Isuzu Trooper 2 (UB2) in 1991 – 2002;
- Isuzu VehiCROSS 1 (UG) in 1997 – 2001;
- Opel Frontera B (U99) in 1998 – 2004;
- Opel Senator B (V88) in 1988 – 1993;
- Opel Monterey A (M92) in 1992 – 1998;
- Opel Monterey B (M98) in 1998 – 2000;
- Opel Omega A (V87) in 1990 – 1994;
- Opel Omega B (V94) in 1994 – 2003.
Disadvantages of the GM 4L30 gearbox
- This is a fairly reliable transmission, and breakdowns only occur at high mileage;
- The torque converter clutch wears out first, and vibrations destroy the oil pump bushing;
- Then the solenoids in the Overdrive valve body begin to fail due to wear debris;
- This dirt then corrodes the solenoid wiring, connectors, and even the valve body;
- In the most severe cases, all solenoids and the oil pump have to be replaced;
- The brake band and the drum to which it is attached are also considered weak points;
- On large SUVs, the planetary gear sets sometimes fail and fail.
