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SCHEDULED ENGINE PM
Oil analysis, top-end inspection and PM-driven engine service intervals across the fleet. Catch wear before it becomes a failure.
- Per-VIN PM schedule
- Oil analysis program
- Top-end inspection
DMV - Washington DC, Maryland, Virginia
Heavy-Duty Diesel Engine & Drivetrain
Heavy-Duty Diesel Engine & Drivetrain
in Beltsville, MD
ATEL provides full-capability engine and drivetrain service for commercial trucks, transit buses, motor coaches and Class A RVs — diesel overhauls, transmission, clutch, differential and driveline work — across Maryland, Washington DC, and Northern Virginia.
What We Do
Engine and drivetrain work from diagnosis to road-test.
An engine job on a Class 8 tractor is a multi-week commitment that ties up a revenue-generating asset. The shop you choose decides whether it is two weeks or six, whether the truck comes back ready or comes back twice. ATEL's diesel team handles in-frame and out-of-frame overhauls, complete transmission rebuilds, clutch and driveline work as core daily services — not occasional jobs.
We work on Cummins, Detroit Diesel, Volvo, Mack, PACCAR and International. Manual and automated transmissions including Eaton, Allison and OEM units. Clutches, differentials, driveshafts, U-joints and PTO systems — anything between the cylinder and the wheel.
Fleet maintenance managers and owner-operators get a scope, a schedule and a number before any wrench turns. Diagnostics drives the work — we don't over-scope.
Start an Estimate-
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Engine Overhaul
In-frame and out-of-frame overhauls on all major heavy-duty diesel platforms. Cylinder kits, bearings, gaskets to OEM spec.
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02
Transmission Service
Manual and automated transmission rebuild and repair — Eaton, Allison, OEM. Clutch service paired.
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Clutch Replacement
Heavy-duty clutch replacement and adjustment. Flywheel resurface where required, alignment to spec.
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04
Differential & Driveline
Differential rebuild, ring-and-pinion service, U-joint and driveshaft work.
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Diagnostics & Verification
Manufacturer-level diagnostics, dyno-style road verification, post-repair scan and sign-off.
Why Us
Why Choose ATEL for Heavy-Duty Engine and Drivetrain?
Professional Engine, Transmission and Driveline Service for Commercial Trucks, Fleets and Buses
Our Experience
32+ years on heavy-duty drivetrains
Family-owned since 1994. Engine and drivetrain work is core to the shop — every major commercial platform, every day.
Platform Range
Cummins, Detroit, Volvo, Mack, PACCAR, International
Manufacturer-level diagnostics and parts pipelines on every major heavy-duty diesel platform.
In-Frame & Out-of-Frame
Diagnostics-driven scope
We don't over-scope work. Diagnostics tells us what the engine needs, not what makes the biggest invoice.
Transmission Capability
Eaton, Allison and OEM rebuilds
Manual, automated and automatic transmission rebuild and repair on every major heavy-duty platform.
Fleet Drivetrain
Multi-unit scheduling, PM-aligned
Drivetrain work scheduled around fleet PM cycles. Consolidated billing on approved accounts.
Warranty Coordination
OEM and extended warranty work
We coordinate engine and drivetrain warranty claims — diagnostics documented, parts traceable, claims supported.
Intake to Delivery
A documented engine process, start to finish.
Engine work needs clear scope. Here is how an engine or drivetrain job moves through our shop.
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01
Intake & Diagnostics
Driver complaint, fault codes, oil analysis where applicable. Baseline inspection before tear-down.
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Tear-Down & Inspection
Engine or transmission opened, components inspected, scope confirmed against initial diagnosis.
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Scope Authorization
Written scope with parts list and timeline before any rebuild proceeds. Warranty providers notified.
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Rebuild or Replace
Components rebuilt or replaced to OEM spec. ASE-certified technicians on every assembly.
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Assembly & Verification
Post-assembly torque, fluid fill, start-up procedure, post-repair diagnostics scan.
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Road Test & Delivery
Road test verification, walk-around with the customer, documentation on file, keys hand-off.
Fleet & Commercial
Fleet Engine & Drivetrain for Commercial Trucks & Buses.
An engine or transmission failure can sideline a fleet vehicle for weeks. ATEL provides scheduled engine work, drivetrain PM, warranty coordination and consolidated billing for commercial truck fleets, transit buses and service vehicles throughout Maryland and the DC region.
Open a Fleet Account
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DRIVETRAIN OVERHAUL COORDINATION
When a tractor needs in-frame, we schedule it around the fleet — predictable downtime, parts in-house before tear-down.
- Pre-staged parts orders
- Predictable downtime window
- PM-aligned scheduling
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WARRANTY CLAIM SUPPORT
OEM and extended warranty work coordinated end-to-end. Diagnostics documented, parts traceable, claims supported with paper.
- OEM & third-party warranty
- Documentation on file
- Direct billing where supported
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Consolidated Billing
Net-30 terms on approved fleet accounts. Monthly statements organized by VIN or division.
- Net-30 on approved credit
- VIN-level line items
- Warranty billing support
ATEL supports commercial fleets throughout Beltsville, Baltimore, Washington DC, and Northern Virginia with engine, transmission and drivetrain service.
Open a commercial account and the next time a drivetrain needs work, the workflow is already in place.
Frequently Asked Questions
Questions we hear from customers
A few quick answers. If yours isn't here, call us or use our contact form.
What heavy-duty engines do you overhaul?
All major platforms — Cummins, Detroit Diesel, Volvo, Mack, PACCAR (Kenworth/Peterbilt), International. In-frame and out-of-frame overhauls, top-end work, and full long-blocks.
Do you rebuild transmissions?
Yes. Manual and automated transmission rebuild and repair on Eaton, Allison and OEM units. Clutch replacement and flywheel resurface paired where required.
In-frame or out-of-frame — how do you decide?
Diagnostics. We tear down enough to see what the engine actually needs, then we write a scope. We don't over-scope work for a bigger invoice.
Can you handle warranty engine work?
Yes. We coordinate with OEM and extended warranty providers — diagnostics documented, parts traceable, claims supported. Direct billing where the policy allows.
Do you do differential and driveline work?
Yes. Differential rebuild, ring-and-pinion service, U-joint replacement, driveshaft balance and PTO systems — all in-house.
How long does an in-frame typically take?
Depends on the engine and the scope. A standard Cummins in-frame typically runs two to four weeks including diagnostics, parts, rebuild and road-test verification.
Where are you located and what areas do you serve?
The shop is at 12120 Conway Rd, Beltsville, MD 20705 — minutes from I-95 and the Baltimore-Washington Parkway. Our primary service area is the DMV: Washington DC, Maryland and Virginia. Fleet pickup and delivery arrangements are negotiable on contract.
Ready to Start
Get a real scope and schedule on your engine job.
Diagnostics-first scoping on every engine and drivetrain job. Fleet work scheduled around PM cycles. Request a quote and we will get back to you within one business day.