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Welcome to the THM Transmission Service Repair Manuals section! Here you will find comprehensive manuals and instructions for maintaining and repairing the transmissions of your THM vehicle. Our team of experts is dedicated to providing you with top-quality materials and updates for your vehicle’s transmission system. Stay updated with the latest manuals and instructions by checking back often. Thank you for choosing THM Transmission Service Repair Manuals!

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GM 125C (3T40) – ATSG (Automatic Transmission Service Group)

This Repair Manual contains the general description, diagnosis and overhaul procedures necessary to repair, overhaul or service the THM 125C (3T40) transaxle. In addition to this booklet for the assembly and disassembly procedures, the…

Buick

GM 4L60 4L60E (THM700R4) TRANSMISSION FULL WORKSHOP REBUILD OVERHAUL REPAIR & PARTS MANUAL

THIS IS THE MOST COMPLETE OEM WORKSHOP REPAIR MANUAL FOR GM HYDRAMATIC 4L60 4L60E TRANSMISSION. The General Motors 4L60 (also known as the THM700R4) has been with us now for over two decades and, along with the completely computer…

Buick

GM THM 200C – ATSG (Automatic Transmission Service Group)

This contains the general description, diagnosis and overhaul procedures necessary to repair, overhaul or service this GM Turbo-Hydramatic 200C transmission. The THM-200 was first used in 1976 models including GM’s T-cars (which includes…

GM THM 4L80E ATRA MANUAL Repair Rebuild Book Transmission Guide 4L80-E

The General Motors 4L80E, in production since 1991, has become the workhorse of GM’s light truck series. This unit has also surfaced in some rather exotic and unexpected vehicles simply because those manufacturers wanted one of the best,…

Fiat

THM 180 – ATSG (Automatic Transmission Service Group)

This Repair Manual contains the general description, diagnosis and overhaul procedures necessary to service the THM 180 and 180C (Tri-matic) transmission. The Turbo-Hydramatic 180 (3L30) is a rear wheel drive three speed transmission,…

Pontiac

THM 200-4R – ATSG (Automatic Transmission Service Group)

This Repair Manual contains the general description, diagnosis charts, and the procedures necessary to overhaul, repair or service the General Motors THM 200-4R four speed automatic overdrive transmission. This information will assist you…

THM

THM 350 350C – ATSG (Automatic Transmission Service Group)

The THM 350 350C – ATSG (Automatic Transmission Service Group) is a comprehensive resource developed by the Automatic Transmission Service Group for automotive technicians and enthusiasts working with the THM 350 and 350C automatic…

Pontiac

THM 3T40 (125C) Update Handbook – ATSG (Automatic Transmission Service Group)

This Update Handbook will explain each change, the parts affected by the change, any parts interchangeability problems created by the change. This Update Handbook will cover all of the changes from start of production up through and…

THM

THM 400 – ATSG (Automatic Transmission Service Group)

This Repair Manual contains general description and overhaul procedures necessary to repair, overhaul or service the Turbo Hydra-Matic 400 transmission, and is found in both passenger cars and trucks. The Turbo Hydra-Matic 400 transmission…

THM

THM 440-T4 “UPDATE HANDBOOK” VOL. 2 – ATSG (Automatic Transmission Service Group)

This version, “VOLUME II’,1 of the 440-T4 “Update Handbook” begins with the engineering design changes that occured in the 1990 model year and will explain each change, the parts affected by the change, any parts interchange problems…

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