A40D and A43D Transmission With Overdrive

Lower Control Valve:

1) A check ball and spring has been added to the lower control valve in the torque converter circuit.

Upper Valve Body:

Check Valve:

2) Due to the addition of the check ball and spring in the lower valve body, the valve body plate and upper and lower valve body gaskets have been changed.
3) A check valve has been added to the front upper valve body.
PRODUCTION EFFECTIVE:

MODEL ATM TYPE TRANSMISSION NO. VIN PRODUCTION DATE

RA63,64 A40D 84JB-00001 (ST) JT2RA6###F6237588 September, 1984
84JB-00456 (GT) JT2RA6###F0059120 September, 1984

RA65 A40D 84JB - 00456 JT2RA65##F4049227 September, 1984
JT2RA65##F0008935 September, 1984

AE86 A42DL 84JK-00952 JT2AE86##F0100544 September, 1984

RN50 A43D 84HF - 02301 JT4RN50R#F5001131 September, 1984
84J F - 01926

RN55,56 A43D 84JF-01961 (SR-5) JT4RN5###F0083580 September, 1984
84JF-02378 (Hvy) JT4RN5###F5030078
84JF-01926 (Carb) 84HF-02301 (Std)

MA67 A43DE 84HL-00596 JT2MA67L#F0141093 September, 1984

MX73 A43DE 84HL - 02001 JT2MX73E6F0000793 September, 1984

MX72 A43DE - ALL - - ALL - December, 1984

YR22,26 A44DL 84HP-04976 JT3YR2#V#F0015331 September, 1984
JT3YR2#V#F5045122

YR27 A44DL 84HP004976 JT4YR27V8F0014582 September, 1984