Transmission Rebuilds — NH Race Engine (Preview)
Workshop Service — Kessel, NL

Transmission Rebuilds

Slipping, grinding or just tired? We rebuild manual and automatic transmissions to handle stock power — or far beyond it — with every clearance measured and every part documented.

What We Rebuild

From a factory-fresh refresh to a full competition build rated for serious torque.

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Manual Transmissions

Tremec TKO/T-56/TKX, Muncie, T5 and more — synchros, bearings, seals and forks replaced, cases cleaned and inspected, shifts like new.

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Automatic Transmissions

TH350/TH400, 4L60/4L80, 6L80/10L90, Torqueflite — full strip, clutches, bands, seals, valve body service or upgrade.

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High-Horsepower Builds

Upgraded clutches, steels, shafts and drums, billet internals, transbrakes and full-manual valve bodies — built to your power level, not a catalogue rating.

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Torque Converters

Stall-speed matched converters for street, strip and tow — cut open, inspected, rebalanced. Custom stall specs on request.

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Transfer Cases & Diffs

Transfer case rebuilds, differential gear swaps, limited-slip service and setup — backlash and pattern set properly, not "close enough".

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Exchange Units

Need it fast? Remanufactured transmissions from stock — your old unit back as a core. See Core Returns.

Transmission on the bench at NH Race Engine, Kessel

Every Rebuild Includes

A rebuild is only as honest as its paperwork. Every transmission that leaves our bench comes with:

  • Complete teardown & cleaning — case hot-tanked and inspected for cracks
  • All wear parts replaced — clutches, bands, synchros, bearings, seals, gaskets
  • Written measurement sheet — clearances and endplay recorded, not guessed
  • Upgrade options priced upfront — you choose before work starts
  • Tested before dispatch — pressure-tested automatics, spin-checked manuals
  • 12-month warranty — parts and workmanship, registered to you

Recognise These Symptoms?

Transmissions rarely die without warning. If yours does any of this, stop driving it hard and talk to us — catching it early often halves the rebuild cost:

  • ⚠️ Slipping between gears or flaring on shifts
  • ⚠️ Delayed engagement into drive or reverse
  • ⚠️ Grinding or crunching on gear changes
  • ⚠️ Whining, humming or clunking from underneath
  • ⚠️ Burnt-smelling or dark transmission fluid
  • ⚠️ Fluid spots where you park
  • ⚠️ Popping out of gear under load
  • ⚠️ Shuddering at cruise speed (converter)

Rebuild Pricing Guide

Fixed written quote before any work starts — the teardown findings are always shared with photos first.

ServiceIncludesStarting From
Manual transmission rebuildSynchros, bearings, seals, inspection€1,450
Automatic rebuild (stock spec)Clutches, bands, seals, valve body service€1,850
High-HP automatic buildUpgraded internals, rated to your power level€3,200
Torque converter serviceCut, inspect, balance — stock or custom stall€395
Differential gear swap & setupGears, bearings, pattern & backlash set€895
Remove & refit (your vehicle)In/out labour when we rebuild your unit€495

All prices include VAT. Exchange units carry a refundable core charge — details on Core Returns.

Common Questions

A rebuild of your own unit is usually best value: known history, correct spec, full warranty. An exchange unit is fastest when we have your type on the shelf. Used transmissions are cheap until they aren't — no history, no warranty. We'll tell you honestly which route makes sense for your budget and timeline.

That's a specialty. Tell us your engine's actual output (or planned output — we can verify on the dyno) and we spec clutches, steels, shafts and valve body to match, with headroom. A transmission rated "close enough" is how you end up on a trailer.

Yes — drive in, we handle everything: removal, rebuild, refit, fluid, road test. Vehicle collection available across NL/BE/western DE if it's not drivable. You can also ship us just the unit — crated freight instructions on request.

Typical turnaround is 5–10 working days from teardown approval, depending on parts availability and upgrade level. Exchange units ship from stock within 48 hours. You'll get the exact timeline in your written quote.

Whatever your measurement sheet says — we specify the exact fluid and fill procedure for every rebuild, and the first fill is included. For performance builds we also give you a service interval; fresh fluid on schedule is the cheapest insurance a transmission can have.

Get Your Transmission Sorted

Describe the symptoms or the build goal — you get a fixed written quote within one business day. Vehicle collection and exchange units available.

Request a Rebuild Quote   Browse Transmissions
NH Race Engine — Haagweg 40, 5995 AB Kessel, Netherlands
✉️ info@nhraceengine.nl  |  VAT: NL003829663B19  |  KvK: 83495096
Mon–Fri: 08:00–18:00  |  Sat: 09:00–14:00 (by appointment)