Overhaul & Testing - 125C/3T40: Applications

1983 Chevrolet Citation 2D Hatchback, 2.8 Z, AutomaticSECTION Applications
THM 3T40 APPLICATIONS

Application Engine
Buick
Century 2.5L, 2.8L & 3.3L
Skyhawk 1.8L & 2.0L
Skylark 2.3L, 2.5L, 3.0L & 3.3L
Somerset 2.5L & 3.0L
Cadillac
Cimarron 1.8L, 2.0L & 2.8L
Chevrolet
Beretta 2.2L, 2.3L & 3.1L
Cavalier 2.0L, 2.2L & 3.1L
Celebrity 2.5L, 2.8L & 4.3L
Citation 2.5L & 2.8L
Corsica 2.2L, 2.3L, 2.8L & 3.1L
Lumina 2.5L & 3.1L
Lumina APV 3.1L
Oldsmobile
Achieva 2.3L & 3.3L
Cutlass Calais 2.3L, 2.5L & 3.3L
Cutlass Ciera & Cutlass Cruiser 2.5L & 3.3L
Cutlass Supreme 2.3L & 3.1L
Firenza 1.8L & 2.8L
Omega 2.5L & 2.8L
Silhouette 3.1L
Pontiac
Fiero 2.5L & 2.8L
Grand Am 2.3L, 2.5L & 3.3L
Grand Prix 2.3L & 3.1L
LeMans 1.6 & 2.0L
Phoenix 2.5L & 2.8L
Sunbird 1.8L, 2.0L & 3.1L
Trans Sport 3.1L
6000 2.5L, 2.8L & 3.1L & 4.3L
RENDER: 1.0x

NO RELATED

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Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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.