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Turbo-Hydramatic 125

The Turbo-Hydramatic 125 was the first in a line of automatic transmissions from General Motors designed for transverse engine application. Introduced in 1980, the line evolved into today's 4T40/45/65/80 line.

The 3-speed Turbo-Hydramatic 125 was introduced in 1980 and produced through 2002. It carried over some parts from the light-duty Turbo-Hydramatic 200 and 350, but was generally a new design.

The 125 was renamed 3T40 later, following GM's new naming convention. The 4T40-E replaced it starting in 1995.
TH125/C (3T40) 1.49" Wide Intermediate Flex Band Relined 1980-81 75700
Price: $15.50
TH125/C (3T40) 1.49" Wide Intermediate Flex Band Relined 1980-81   75700
TH125 1.49" Intermediate Flex Band
TH125/C (3T40) 1.74" Wide Intermediate Flex Band Relined 82-93 75700A
Price: $13.37
TH125/C (3T40) 1.74" Wide Intermediate Flex Band Relined  82-93 75700A
TH125 1.74" Intermediate Flex Band RED
Tech Manual, 3T40, 125C Update / Supplement 87-01
Repair, Rebuild, Technical, Manual, 125C, 3T40, Update Handbook, (87-01)
Price: $35.99
Repair, Rebuild, Technical, Manual, 125C, 3T40, Update Handbook, (87-01)
Tech Manual, 3T40, 125C, Update/Supplement, GM (87-01)
TH125/C (3T40) 1.74" Wide High Energy Band Relined 1994-Up 75700B
Price: $15.72
TH125/C (3T40) 1.74" Wide High Energy Band Relined 1994-Up  75700B
TH125/C (3T40) 1.74" Wide High Energy Band 1994-Up 75700B
Raybestos Powertrain Band - GM 3T40, TH125, TH125C (1981-1992)
Raybestos Powertrain Band - GM 3T40, TH125, TH125C (1981-1992)
Price: $10.72
Raybestos Powertrain Band - GM 3T40, TH125, TH125C (1981-1992)
OEM Reference Number 8637623
unavailable
Wire Harness, Pigtail, GM (80-01)
Price: $49.99
Wire Harness, Pigtail, GM (80-01)
Wire Harness, External (4 Wire), Pigtail, GM (80-01)
Bushing, Case 125, 440, 4T60, EXT Housing, 4T60E, 4T65E, GM (Teflon)
Price: $29.99
Bushing, Case 125, 440, 4T60, EXT Housing, 4T60E, 4T65E, GM (Teflon)
Bushing, Case 125, 440, 4T60, EXT Housing, 4T60E, 4T65E, GM
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