73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: 87ChevyR10 on January 28, 2014, 03:06:49 pm
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(http://img.photobucket.com/albums/v206/Triple3Rydah/CAM00564-1.jpg)
9MX0 - 4 spd auto trans ( i know its a 700r4, but there were different specific models and i cant find this code anywhere under any rpo code listing, closest resemblance is searching for "mx0" individually)
9J50 - this would solve my brake system dilemma once and for all. power brakes, light duty, JB3?
9GU2 - Ive figured out this one, so im in the process of planning out the rebuild/gears on the rear-end.
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(http://img.photobucket.com/albums/v206/Triple3Rydah/CAM00566-1.jpg)
(http://img.photobucket.com/albums/v206/Triple3Rydah/CAM00565-1.jpg)
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4th digit on the VIN should tell you what GVW and brake system you have.
found these... from here.... http://www.crankshaftcoalition.com/wiki/GM_RPO_build_codes
MXO : MERCHANDISED, TRANS, AUTO PROVISIONS, O/D
J50 : BRAKE SYSTEM, POWER
JB3 : BRAKE, POWER, DISC/DRUM, 4600 LBS
JB5 : BRAKE, POWER, DISC/DRUM, 6400 LBS
JB6 : BRAKE, POWER, DISC, DRUM 7200 LBS
JB7 : BRAKE, POWER, DISC, DRUM 8400 L85
JB8 : 8RAKE, POWER, DISC, DRUM 10000 LBS
JC4 : BRAKE, POWER, DISC, DRUM 5600 LBS
JC7 : BRAKE, POWER, DISC/DRUM, 12000 LBS
JCB : BRAKE, POWER, DISC/DISC, 20000 LBS
JD5 : BRAKE, DUAL POWER, DISC/DRUM, 6400 LBS
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Don't confuse the proceeding "9" as part of the RPO code, they are only 3 digits.
Most all of the 1987 RPO's are here:
http://www.73-87chevytrucks.com/techinfo/7387CKMans//Unit_Repair/ST_333_87_1987_Chevrolet_Light_Duty_Truck_Unit_Repair_Manual.pdf
MX0 4 Speed Auto. Trans, with OD. Requires MD8 (as it shows above)
MD8 Transmission - THM 700, Automatic 4-Speed
GU2 2.73 gears (as it shows above)
J50 is power brakes (as shown above)
As stated you need to look at your VIN to determine the brake system...