Service · Drivetrain
Heavy-Duty Transmission & Clutch Service in Jackson, MS
Wilkerson's services heavy-duty diesel transmissions and clutches at our Jackson, MS shop on US-49. Automatic and manual, Eaton, Allison, Volvo, Mack, Paccar — diagnostics, fluid and filter service, clutch service, internal repair, and full rebuild coordination. Transmission and clutch failures hit owner-operators and fleets hard because the truck doesn't drive — and the longer it sits at the wrong shop, the worse the math gets.
We diagnose before we sell parts. Hard shifts, slipping under load, slow engagement, fluid burnt or low — every transmission complaint has a story, and most of them are not “your transmission is shot.” Sometimes it's a fluid and filter service. Sometimes it's a sensor or solenoid. Sometimes it's clutch wear. We figure out which before we quote a $7,000 rebuild.
Clutch work is part of the same drivetrain conversation. We handle clutch service on manual and automated-manual trucks — diagnosis, adjustment, and full clutch replacement, including the throw-out bearing, pilot bearing, and clutch brake while we're in there. A grabby or high pedal, slipping under load, or trouble getting into gear usually starts at the clutch, and catching it early keeps a clutch job from turning into a transmission job.
When a rebuild is the right call, you get a written estimate before any teardown work, our written warranty on the repair, and a realistic timeline up front.
What's included
Everything we do on a transmission and clutch visit.
Transmission diagnostics
Fluid condition, fault codes, road test if drivable, internal pressure testing where applicable.
Fluid & filter service
Manufacturer-spec fluids and filters. PM-interval service that extends the life of the unit significantly.
Clutch service
Diagnosis, adjustment, and full clutch replacement — throw-out and pilot bearings, clutch brake, linkage and pedal work. Slip vs. engagement diagnosis on manual and automated-manual trucks.
Solenoid & sensor work
Common failure on automatic boxes. Often the “rebuild” the other shop quoted you wasn't.
Internal repair
Bands, clutches, planetary work where applicable. Written estimate before teardown.
Rebuild coordination
Full rebuild, in-house or with our trusted rebuild partner — depends on the box. Same warranty either way.
Replacement
When rebuild doesn't make sense, we can spec a replacement unit and install.
Signs you need this
When to call us.
Most of these symptoms point to the work on this page. A few point somewhere else — and we'll tell you straight either way.
- Slipping under load — RPM climbs but truck doesn't accelerate
- Hard or delayed shifts
- Won't engage in one or more gears
- Burnt-smelling or dark transmission fluid
- Check-engine light with transmission-related codes
- Whining or grinding from the bell housing area
Brands we work on
If it runs diesel, we've probably worked on it.
These are the ones we see most — not the whole list. If it runs on diesel, we service it. Don't see yours? Call us — odds are we've already worked on it.
Transmissions we service
- Eaton
- Eaton Fuller
- Allison
- Volvo
- Mack
- Paccar TX
Pricing & estimates
No surprises on the invoice.
Diagnostic starts with fluid condition, codes, and a road test. Written estimate before any internal work. Many transmission complaints clear with a service or sensor work — we don't quote a rebuild until we know it's actually one.
Our process
No surprises between the call and the invoice.
Four steps from the first call to the keys back in your hand. No mystery, no upsell theater.
- 01/Step
Call us
A real person answers the phone. We'll tell you straight whether your job is in scope and book you in if it is.
- 02/Step
Written estimate
We diagnose and write up the work before we touch anything billable. You see the price and the parts before you approve.
- 03/Step
You approve
Nothing happens without a green light from you. If we find more during the repair, we stop and call before we keep going.
- 04/Step
Repair + written warranty
Same name on the invoice every time. Our own written warranty on covered work — and the family promise behind it.
Why Wilkerson's
Three reasons people keep coming back.
- Before quote
- Diagnose
- Eaton, Allison, Volvo, Mack
- Multi-brand
- Warranty
- Written
Half of “your transmission is gone” calls are actually a sensor, a fluid issue, or a clutch. We figure out which before we sell parts.
We work on the major heavy-duty boxes. If your unit isn't on the list, call — we'll tell you straight if it's in scope.
Our own written warranty on the repair — we stand behind the work.
Frequently asked
What people ask before they bring the truck in.
Tap any question to expand the answer.
Wide range — depends on the unit (Eaton vs. Allison vs. Volvo), what's wrong, parts availability, and whether it's in-house vs. coordinated with a rebuild partner. We don't quote rebuilds blind. Diagnostic first, real estimate second.
Honestly — sometimes yes. Especially on automatics with low/burnt fluid. We always check fluid condition and codes before we recommend internal work. If a service fixes it, we'll tell you and you'll be back on the road that day.
Eaton, Eaton Fuller, Allison, Volvo, Mack, and Paccar TX series. If your transmission isn't listed, call — we'll tell you if it's in scope.
Most internal repairs run 5–10 days depending on parts availability. Full rebuild coordination with a partner shop can run longer. We tell you the realistic timeline before any work starts.
Yes — clutch diagnosis, adjustment, and full replacement on manual and automated-manual trucks. A slipping clutch, a grabby or high pedal, or trouble getting into gear usually traces back to clutch wear. We confirm it before we sell you a clutch, and replace the throw-out bearing, pilot bearing, and clutch brake while we're in there.
Yes — our own written warranty covers transmission and clutch service and repair. If it fails inside the term, we make it right.
Wide range — depends on the unit (Eaton vs. Allison vs. Volvo), what's wrong, parts availability, and whether it's in-house vs. coordinated with a rebuild partner. We don't quote rebuilds blind. Diagnostic first, real estimate second.
Eaton, Eaton Fuller, Allison, Volvo, Mack, and Paccar TX series. If your transmission isn't listed, call — we'll tell you if it's in scope.
Yes — clutch diagnosis, adjustment, and full replacement on manual and automated-manual trucks. A slipping clutch, a grabby or high pedal, or trouble getting into gear usually traces back to clutch wear. We confirm it before we sell you a clutch, and replace the throw-out bearing, pilot bearing, and clutch brake while we're in there.
Honestly — sometimes yes. Especially on automatics with low/burnt fluid. We always check fluid condition and codes before we recommend internal work. If a service fixes it, we'll tell you and you'll be back on the road that day.
Most internal repairs run 5–10 days depending on parts availability. Full rebuild coordination with a partner shop can run longer. We tell you the realistic timeline before any work starts.
Yes — our own written warranty covers transmission and clutch service and repair. If it fails inside the term, we make it right.
Transmission and Clutch done right. Call us.
Mon–Fri · 7am–5pm · Saturday · 7am–12pm