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How a transmission is rebuilt

A real look inside the box most shops never open — the parts, the steps, and the MDC way.

Every piece that makes up your transmission — and every one we inspect, clean, and rebuild.

What's actually inside a transmission

An automatic transmission is one of the most complex parts of your vehicle — hundreds of pieces working together to send engine power to the wheels at the right gear, every second you drive. When it fails, most shops swap the whole unit. Mike rebuilds it from these parts out:

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Planetary gear sets

The heart of it — the gears that actually change your ratios as you speed up and slow down.

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Clutches & bands

Friction discs and steel plates that grab and release to shift gears. They wear and burn — a top cause of slipping.

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Valve body

The "brain" — a maze of passages and valves that routes fluid pressure to make the shifts happen.

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Torque converter

The fluid coupling between engine and transmission. A bad one causes shudder and overheating.

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Servos & switches

The small movers and sensors that apply the bands and tell the system what's going on.

Seals & gaskets

Keep the fluid where it belongs. Old, hard seals leak — and a transmission with no fluid is a dead one.

The rebuild, step by step

1 · Diagnose & road test

Before anything comes apart, Mike drives it and reads the codes to find the real failure — not just the symptom.

2 · Remove the unit

The transmission comes out of the vehicle — usually 4–8 hours of careful work depending on the truck or car.

3 · Tear down & inspect

It's taken fully apart, every internal part laid out and inspected. This is where you find the burnt clutches, worn gears, and scored parts most shops never see.

4 · Clean everything

Every piece is cleaned spotless. Old fluid and debris is exactly what kills a transmission early.

5 · Replace what's worn

New clutches, bands, seals, gaskets, and any damaged hard parts — gears, servos, switches. Built back to spec.

6 · Reassemble to spec

Put back together precisely, with the right clearances and pressures. This is craftsmanship, not guesswork.

7 · Install, fill & test

Back in the vehicle, filled with the correct fluid, and road-tested again to confirm it shifts right before it goes home.

Start to finish that's typically about 4 days — tear down, parts, reassembly — and Mike likes to beat that estimate, not miss it. (Some modern units, like the 10-speed 10R80, can take longer if parts are back-ordered — he'll tell you up front.)

Swap shop vs. real rebuild

✕ The typical shop

Drops in a used or generic reman unit without opening it. Same weak points, same failure — often back on the lift within a year, and now it's your bill.

✓ MDC Consolidated

Rebuilt from the gears out — every internal part inspected, worn parts replaced, assembled to spec. Mike finds the real reason it failed and fixes it, so it stays fixed.

Got a transmission acting up?

Get a straight answer from a real specialist — and an honest quote.

📞 (706) 900-9696 Send a repair report →

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