Jatco
Source-verified model
Jatco JR405E
The 4-speed automatic gearboxes RC4A-EL for RWD and AWD vehicles with engines 1.6 – 3 lit. were designed in 1999 for Mazda and Nissan on a Japanese market. It was frequently installed on RWD models Isuzu and Suzuki.
Speeds
4
Type
AT
Drive
RWD/AWD
Max torque
300
ATF capacity (L)
8,7
ATF type
AT-Matic J
Other and alternative codes of this transmission
RC4AE-L
RC4A-EL
RC4-AEL
JR405E
RC4AEL
JR405-E
RC4 AEL
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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Oil Contamination Solenoid Damage
Rapidly contaminating oil clogs solenoids and valve body, requiring external inline filter on cooling line.
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Torque Converter Wear
Torque converter requires rebuild to prevent damage to transmission pump and bushing at high mileage.
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Transmission Pump Failure
Pump at risk of damage if torque converter is not repaired in time; directly linked to converter wear.
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Solenoid Failure Contamination
Solenoids frequently ordered as replacement parts, indicating susceptibility to failure from dirty fluid.
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Valve Body Oil Contamination
Valve body affected by rapidly contaminating transmission fluid, leading to shifting issues and solenoid damage.
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Bushing Wear Degradation
Internal bushing deteriorates alongside torque converter, requiring attention during converter rebuild.
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Gasket Seal Degradation
Gaskets and seals require timely monitoring and replacement; repair kits commonly ordered for major overhaul.
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About this transmission
Transmission general data
The 4-speed automatic gearboxes RC4A-EL for RWD and AWD vehicles with engines 1.6 – 3 lit. were designed in 1999 for Mazda and Nissan on a Japanese market. It was frequently installed on RWD models Isuzu and Suzuki.
Technical issues and repair guidelines
Old cars with the mileage higher than 150 thousand kilometers commonly get some linehaul external filter cut in the oil cooling line by specialists in order to refine quickly contaminating oil and protect solenoids and the valve body. After travelling more than 200 thousand kilometers, it is necessary to repair the torque converter for saving the pump and the bushing. This transmission is quite rare and reliable unit, for which it is necessary to change fluid and monitor conditions of gaskets and seals on a timely basis. It is a common case to order solenoids and sometimes repair kits of gaskets and seals for major repairs of this transmission.
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