General Motors
Source-verified model
General Motors 4T40E
The 4-speed automatic transmission 4T40E, 4T45E rarely appears in repair services. It has been used since 1995 on FWD American (and Korean) GM vehicles with engines up to 2 liters. In terms of design, this transmission is related to the 3T40, their spare parts are interchangeable.
Speeds
4
Type
AT
Drive
FWD
Max torque
230
ATF capacity (L)
11,7
ATF change (L)
6,5
ATF type
Dexron VI
Other and alternative codes of this transmission
4T40E
MN4
4T40-E
verified naming
OEM designation
source name
Common problems & symptoms
Problems and symptoms reported for this transmission, compiled from repair sources. Not a complete list.
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Torque Converter Wear
Torque converter identified as primary weak point, requiring early parts replacement in most American automatics.
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Vibrations From Converter
Driving with worn torque converter causes noticeable vibrations in the vehicle.
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Rapid ATF Contamination
Worn torque converter accelerates ATF contamination, degrading fluid quality prematurely.
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Torque Converter Seal Failure
Seal near input shaft fails due to neglected torque converter wear, causing leaks.
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Burnt ATF And Friction Elements
Burnt ATF condition requires replacement of all friction elements and the brake band.
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Torque Converter Bushing Wear
Bushing located near input requires replacement when torque converter issues are left unaddressed.
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Full Bushing Kit Failure
Neglected torque converter problems escalate to requiring replacement of the entire bushing kit.
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ATF Filter Degradation
Regular ATF and filter replacement is a common service requirement for the 4T40E/4T45E.
Parts categories
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About this transmission
Transmission general data
The 4-speed automatic transmission 4T40E, 4T45E rarely appears in repair services. It has been used since 1995 on FWD American (and Korean) GM vehicles with engines up to 2 liters. In terms of design, this transmission is related to the 3T40, their spare parts are interchangeable.
Technical issues and repair guidelines
The repair of the 4Т40 transmission often lies in change of ATF, and replacement of filter and spare parts. The oil of any type (from Dexron III to Dexron VI) may be used for the 4Т40 transmission.
The torque converter is a soft spot in almost all American automatic transmissions and requires replacement of spare parts quite early. Driving with worn torque converter may lead to vibrations, rapid ATF contamination and issues with the seal and bushing of the torque converter located immediately near the input. If this problem stays neglected, then it is required to change the torque converter bushing and the whole kit of bushings.The problem of burnt ATF is solved by replacement of all friction elements and the brake band.
Vehicle fitment explorer
Confirmed vehicle applications. Every row is drawn from our source-verified fitment database.
| Make | Model | Year | Drive | Engine |
|---|---|---|---|---|
| Buick | SKYLARK | 97 | 4 SP FWD | L4 2.4L |
| Chevrolet/GM | CAVALIER | 95-05 | 4 SP FWD | L4 2.2L 2.3L 2.4L |
| Chevrolet/GM | LACETTI | 06-08 | 4 SP FWD | L4 1.5L 1.6L |
| Daewoo | NEXIA | 00-03 | 4 SP FWD | L4 1.5L |
| Daewoo | NUBIRA-2 | 00-04 | 4 SP FWD | L4 1.5L 1.6L 1.8L 2.0L |
| Oldsmobile | ALERO | 99-04 | 4 SP F/4WD | L4 2.2L 2.4L |
| Oldsmobile | CUTLASS | 97-99 | 4 SP FWD | V6 3.1L |
| Pontiac | GRAND AM | 99-05 | 4 SP FWD | L4 2.2L 2.4L |
| Pontiac | SUNFIRE | 95-05 | 4 SP F/4WD | L4 2.2L 2.4L |
Related transmissions
Transmissions that share architecture, manufacturer lineage or vehicle platforms — useful for alternative fitment, spec comparison and cross-referencing parts.
Sources & Contribution
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