Chrysler
Source-verified model
Chrysler A413
This popular family of 3-speed automatic transmissions A404 / A413 / A470 / A670 had been successfully installed since 1981 on FWD vehicles Chrysler, Dodge and Plymouth of a middle class for nearly 20 years.
Speeds
3
Type
AT
Drive
FWD
ATF capacity (L)
8,4
ATF change (L)
3,8
ATF type
Mopar ATF+3
Other and alternative codes of this transmission
31TH
31 TH
A413
A 413
30TH
verified naming
OEM designation
source name
Common problems & symptoms
Problems and symptoms reported for this transmission, compiled from repair sources. Not a complete list.
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ATF burning smell detected
Burnt ATF odor indicates friction component degradation; clearances in clutch packs become difficult to set.
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Friction clutch pack wear
Friction discs and steel discs wear out due to ageing and overheating; full replacement required during overhaul.
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Bushing wear oil starvation
Worn bushings cause oil starvation to friction components, accelerating clutch pack failure and transmission damage.
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Plastic thrust washer degradation
Plastic washers deteriorate due to ageing and overheating; replaced as standard procedure during transmission overhaul.
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Overrunning clutch separator failure
Springs and rollers of the overrunning clutch separator wear out and require replacement kit during overhaul.
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Governor pressure regulator wear
Centrifugal pressure governor (Governor) degrades over time and typically requires full rebuild during transmission serv
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Torque converter lockup solenoid
A670 variant lockup solenoid fails, affecting early torque converter lock-up engagement in the hydraulic 3-speed system.
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Brake band adjustment failure
Brake bands wear and require replacement alongside friction kit; clearance setting becomes problematic when worn.
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About this transmission
Transmission general data
This popular family of 3-speed automatic transmissions A404 / A413 / A470 / A670 had been successfully installed since 1981 on FWD vehicles Chrysler, Dodge and Plymouth of a middle class for nearly 20 years.
Technical issues and repair guidelines
The overhaul kit of gaskets and seals is frequently ordered by transmission specialists for repair of automatic gearboxes of this family. Specialists also order a complete kit of frictions. Friction components are replaced if the ATF has burning smell and its hard to set clearances in packages. A typical repair procedure of this transmission family includes the replacement of all spare parts (including the kit of friction components, steel discs and brake bands.Ageing process and overheating lead to the wear-out of plastic discs (washers) which are replaced during the overhaul. Specialists also frequently replace a complete kit of bushings. Worn-out bushings lead to the oil starvation of frictions.
The list of spare parts for this transmission also includes:
- The kit of the overrunning clutch separator (springs and rollers)
- The pressure centrifugal regulator (Governor) is usually rebuilt.
- Solenoid of the torque converter lock-up for А670 introduced in the hydraulic 3-speed for switch-on of an early lock-up.
A404 /470 /670, 30TH/31TH is a family of unique transmissions produced by Chrysler having a solid reserve of transmission components.
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