By Inglewood Transmission • October 15, 2025 • 7 min read
Built should mean something. The word gets used everywhere, but their results do not match.
At Inglewood, a build is a measured system, not a parts list.
What most performance means today
Many sellers call a unit performance because it has a few upgraded parts. That approach ignores the rest of the system. Clearances, hydraulic integrity, thermal load, calibration, and validation decide whether a transmission lives or fails.
- Parts installed without measurement or end play data
- No machining plan, worn surfaces reused, sealing compromised
- Valve body shortcuts, pressure changes without balance corrections
- No bench validation, the customer becomes the test stand
The Inglewood process
We start with failure mode and operating context, then build a system that manages torque, temperature, and pressure with margin.
1. Teardown and inspection
We map contamination, wear, thrust, end play, clutch pack clearance, bushing fit, and gear geometry. The baseline tells us what must change.
2. Machining and surface recovery
We correct critical surfaces, hubs, drums, valve body faces, and pump halves as needed. This restores sealing integrity and makes tolerances repeatable.
3. Parts selection with purpose
Upgrades match the use case. Tow and heat control get different priorities than drag passes. We spec steels, frictions, reinforced hard parts, accumulators, and seals for longevity and control.
4. Tolerances and hydraulic integrity
Clearances drive heat and clutch life. We set clutch packs to targets, verify pump volume, and test for cross leaks. Smooth, consistent pressure improves shift quality and lifespan.
5. Valve body and calibration
We correct balance, address leak paths, and set pressure to the application. Calibration is a curve that matches the hardware and the job you do.
6. Validation and documentation
Every build is bench tested for pressure, flow, and shift events. Results are recorded and verified before it leaves the shop.
Why it matters on the road and at the track
- Heat control lowers failure risk under tow and in traffic
- Shift quality improves drivability under load
- Torque capacity rises when the whole system is in balance
- Longevity comes from measurement, not luck
This is how we approach platforms like 68RFE, 10R80, and Allison. The platforms are different, the process is consistent.
Proof of work
- Measured end play and clutch clearances documented
- Bench test pressure and event timing captured before shipment
- Cooler and fluid plan included with delivery
Next steps
If you tow heavy, add power, or want a transmission that does not quit, start a build conversation with our team.
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See built transmissions on our parts site