Transmissions
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Every transmission handled by one technician from start to finish.
Each transmission is different and each customer has different needs. Allowing a single builder to craft your transmission means that he is intimately involved with both the transmission and the project. He has your requirements in mind at every point in the process.

We only build high performance transmissions.
That's right, we're not looking to rebuild your wife's minivan transmission. Hot Rods... Street Rods... those are our loves, so we'll leave the soccer practice and 9-to-5 commuter transmissions to the bulk manufacturers. We know how you feel when you are looking for someone you can trust with your baby, and we treat it like it is our own.
The best parts make the best transmissions.
We only use the top parts when it comes to our transmissions.
Happy builders produce better builds.
At Gearstar, we have selected each of our master builders for their high level of expertise and we treat them with the respect that every skilled craftsman deserves. When it comes to your transmission, our builders are given the time and resources they need to do it right the first time.
Choose your model:
- TH 350 Transmissions
- TH 400 Transmissions
- 700R4 Transmissions
- 2004R Transmissions
- 4L60E Transmissions
- 4L65E Transmissions
- 4L70E Transmissions
- 4L80E Transmissions
- 4L85E Transmissions
- 6L80E Transmissions
- AOD Transmissions
- C4 Transmissions
- C6 Transmissions
- E4OD Transmissions
- 4R70W Transmissions
- AODE Transmission
- Torqueflite 727 Transmissions
- 5-45RFE Transmissions
- NAG-1 Transmissions
- 4L60E Level V
- 4L60E Level VI
- 4L65E Level VI
- 4L65E Level VII
- 4L70E Level VI
- 4L70E Level VII
- 4L80E Level V
- 6L80E
- NAG-1
- C5 4L65E Level V
- C5 4L65E Level VII
- HGM CompuShift CSII Controller












