Transtar Industries & Sonnax
Transtar's community of suppliers represents the most trusted and experienced in the industry. Sonnax shares our vision and meets the premium standards we set for all of our product offerings. We rely on the best aftermarket and OE suppliers in the industry.
For GM Applications: 6L45, 6L50, 6L80, 6L90:

Say goodbye to paying top-shelf prices for GM 6-speeds. Sonnax now offers a full range of remanufactured 6L80 valve bodies GUARANTEED to deliver a combination of great performance and value you won’t find anywhere else!
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Bores, plates, checkballs, seals, casting…EVERY critical area is reviewed, refreshed and repaired.
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Top-quality Sonnax components optimize valve body function and prevent future wear.
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State-of-the-art testing verifies AFL, clutch, TC and compensator feed pressures match new OE specs.
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Tech and install tips ship with every unit, as does a Limited Lifetime Warranty!
Note: TEHCM not included with valve bodies. (
Click Here for TEHCM Options)
Transtar Part Number: |
Sonnax Part Number: |
Transmission |
Year |
P104740-1A |
GM6L45E |
6L45/50 |
06-10 |
P104740-2A |
GM6L80E |
6L80 |
06-10 |
P104740-3A |
GM6L90E |
6L90 |
06-10 |
P104740-1B |
GM6L45L |
6L45 |
10-16 |
P104740-1C |
GM6L50L |
6L50 |
10-16 |
P104740-2B |
GM6L80L |
6L80 |
10-16 |
P104740-3B |
GM6L90L |
6L90 |
10-16 |
P104740-4A |
BMW6L45E |
6L45, BMW |
06-10 (R&R Only) |
P104740-4B |
BMW6L45L |
6L45, BMW |
10-16 (R&R Only) |
Resources: