Overhaul - THM 400: Identification

1983 Chevrolet Sportvan G10, 5.7 LSECTION Identification

Transmission serial number is located on identification plate attached to right side of transmission case. See Fig 1. Number consists of model year, 2 letter model code, and production serial number.

Fig 1: THM 400 Identification Location
G96F15961Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.