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**lolife99** · 06-28-2019, 02:14 PM

Look at this thread also:
http://67-72chevytrucks.com/vboard/s...d.php?t=209390
A lot of parts stores show JB3 or JB5 when referring to brake parts,...

QUOTE:
JB3 is the 1" thick rotors
JB5 is the 1.25" thick rotors

06-28-2019, 02:14 PM	#14
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,685	Re: Front brake dragging, 83 GMC Look at this thread also: http://67-72chevytrucks.com/vboard/s...d.php?t=209390 A lot of parts stores show JB3 or JB5 when referring to brake parts,... QUOTE: JB3 is the 1" thick rotors JB5 is the 1.25" thick rotors __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823