The Chrysler 31TH, or A413, 3-speed automatic transmission was produced from 1981 to 2001 and installed in many models, but is best known for its use in the Neon sedan and Chrysler minivans. Several modifications of this transmission exist, but the most common are the A470 and A670.
TorqueFlite Family: 31TH, 32RH, 42RH, 42RE, 44RE, 46RH, 46RE, 47RH, 48RE.
Specifications
| Type | automatic transmission |
| Number of gears | 3 |
| Type of drive | front |
| Engine volume, l | up to 3.0 |
| Torque output, Nm | up to 250 |
| Recommended oil | Mopar ATF+4 (MS-9602) |
| Oil capacity, liter | 8.5 |
| Replacing the oil | every 50 000 km |
| Replacing the filter | every 50 000 km |
| Gearbox lifespan, km | ~300 000 km |
Gear ratios Chrysler 31TH
Using the example of a 1997 Chrysler Neon with a 2.0 liter engine:
| Main | 3.19 |
| 1st | 2.69 |
| 2nd | 1.55 |
| 3rd | 1.00 |
| Reverse | 2.10 |
Using
The transmission was installed on:
- Chrysler LeBaron 2 in 1981 – 1988; LeBaron 3 in 1986 – 1995;
- Chrysler Neon 1 (SX) in 1993 – 1999; Neon 2 (PL) in 1999 – 2001;
- Chrysler Voyager 1 (AS) in 1984 – 1990; Voyager 2 (ES) in 1990 – 1995; Voyager 3 (GS) in 1995 – 2000; Voyager 4 (RG) in 2000 – 2001;
- Chrysler Town & Country 1 (AS) in 1984 – 1990; Town & Country 2 (ES) in 1990 – 1995; Town & Country 3 (GH) in 1996 – 2000; Town & Country 4 (GY) in 2000 – 2001;
- Dodge Caravan 1 (AS) in 1984 – 1990; Caravan 2 (ES) in 1990 – 1995; Caravan 3 (GS) in 1996 – 2000; Caravan 4 (RG) in 2000 – 2001;
- Dodge Grand Caravan 1 (AS) in 1984 – 1990; Grand Caravan 2 (ES) in 1990- 1995; Grand Caravan 3 (GH) in 1996 – 2000; Grand Caravan 4 (GY) in 2000 – 2001;
- Dodge Dynasty 1 in 1987 – 1993;
- Plymouth Grand Voyager 1 in 1984 – 1990; Grand Voyager 2 in 1990 – 1995; Grand Voyager 3 in 1996 – 2000;
- Plymouth Voyager 1 in 1984 – 1990; Voyager 2 in 1990 – 1995; Voyager 3 in 1996 – 2000.
Disadvantages of the Chrysler 31TH gearbox
- This is a simple and reliable automatic transmission, and breakdowns will only occur due to wear;
- A typical repair is an overhaul with replacement of the gasket and seal kit;
- If repairs are delayed, the worn-out clutch packs will need to be replaced;
- Also, during an overhaul, it is often necessary to replace the brake bands and the reverse drum;
- Weak points include the centrifugal adjuster and the overrunning clutch separator.
