B&M 87-91 GM TH400 375 m40 R010003 34 in Length

34 in Length

1987-1989 GMC R3500

QC Gear Tote Holder

Wastegate open pressure setting for controlling boost spikes and faster spool

Care instructions published by Nomex(R) manufacturer DuPont

B&M 87-91 GM TH400 375 m40 R010003 34 in LengthShift Improver Kit for TH 400 (3L80) Automatic Transmission B&M'specializes in performance automatic transmissions, torque converters, SFI approved flexplates, legendary automatic shifters, precision manual shifters, and many other transmission products including cast deep aluminum transmission pans, transmission coolers, and automatic transmission fluid. B&M Performance and Off Road has been at the vanguard of the growing automotive aftermarket since