Mon-Fri 7:00 AM to 4:00 PM·1665 Donto Way, Brooksville, FL
24/7 Fleet Roadside: (352) 433-3800
Casselberry, FL · Seminole County

Mobile diesel mechanic and truck repair in Casselberry, FL

Casselberry's main crossroads, US 17/92 and SR 436, was once called one of the deadliest intersections in the country. When a diesel stops near it, an RDI technician comes out from our Brooksville shop to diagnose and repair it on site.

Mobile Diesel Repair for Casselberry, FL by RDI Power
  • On-site at your locationService
  • Seminole CountyCounty
  • 24/7 for fleet accountsFleet roadside
  • 3 yr / 36,000 mi laborWarranty

Casselberry grew out of the unincorporated Fern Park area, where Hibbard Casselberry first bought fernery land near Lake Orienta. Today the city is tied to the rest of Central Florida mainly by US 17/92, SR 436 and I-4, and those roads carry a lot of trucks: FDOT counts about 4,382 a day on US 17/92 and 3,871 on SR 436 near the city. RDI Power has no shop in Casselberry. Our mobile technicians come from Brooksville to the yard, job site, parking lot or shoulder where your diesel stopped, with the diagnostic tools and parts to find the cause and, when the job allows, fix it right there.

Breakdowns at the US 17/92 and SR 436 flyover in Casselberry

Before 2015, the intersection of US 17/92 and SR 436 averaged about three crashes a day and was described as one of the nation’s deadliest. An $80 million flyover, completed April 6, 2015, now carries US 17/92 over SR 436. A truck that stops on the flyover itself has no side street to roll into, so the priority is visibility: hazards on, warning devices out behind the truck, everyone out of the travel lanes. A truck that stops at the surface intersection below should get into a lot if it can do so safely. Either way, tell us whether you are up on the flyover or at street level, and which direction you were heading.

Red Bug Lake Road and the eastbound SR 436 ramp

An eastbound SR 436 flyover ramp to Red Bug Lake Road opened February 1, 2014. Ramps are poor places to work on a truck, with limited room and traffic arriving at speed. If the truck stops on one, call with the exact location and let the technician decide whether the spot is safe to work. If it is not, we talk through moving the truck somewhere it can be repaired properly, and if a tow is needed just to clear the ramp, the diagnosis still happens before anyone commits to a long haul.

Casselberry’s commercial strips and lot repairs

US 17/92 through Casselberry falls under a Seminole County Community Redevelopment Agency that handles redevelopment of the corridor across the county. A diesel that will not restart behind a store or at a loading area along US 17/92 or SR 436 is often a simpler job than one on a highway shoulder. The technician needs firm, level pavement beside the truck, room for the service truck and space to work around both. Let us know who manages the property, so nobody is surprised when a service truck pulls in.

LYNX route 436S runs along SR 436 from Fern Park to Orlando International Airport. If the truck is stopped near a bus stop, mention it; nobody wants a dead box truck blocking a stop for the afternoon, and the technician will plan around it.

Getting a Casselberry visit started

Three things decide how fast the right technician arrives with the right parts. First, the location, as precisely as you can give it: flyover or street level, the business in front of you, the direction of travel. Second, the truck: year, make, engine and, for a fleet unit, its number. Third, the story: what it did before it stopped, which lights came on and in what order, and anything worked on recently. A photo of the dash taken before the key is turned off is worth sending too, since some warnings disappear on restart.

A Casselberry repair-or-tow decision, made on site

The value of a mobile visit is the diagnosis as much as the repair. Instead of towing a truck to a shop and waiting for someone to look at it, the technician scans it, reads live data and tests the suspect system where it sits. RDI’s diagnostic capability includes Ford IDS and WiTECH for Ford and Ram pickups, plus heavy-duty software for medium and heavy trucks. Then one of two things happens:

  1. Fixed on the spot. Starters and batteries on a no-crank, alternators on a charging fault, belts and hoses on an overheat, fuel filters and water separators on a fuel problem, sensors and wiring on a derate, air leaks and brake chambers on an air-brake truck.
  2. Moved with a plan. If the job needs a lift or a teardown, you know what failed before the truck moves, and we plan the trip to our Brooksville shop with you.

Either way you get a digital vehicle inspection with photos and notes, and the work carries RDI Power’s 3-year / 36,000-mile labor warranty.

Casselberry jobs the Brooksville shop takes over

Bay work includes internal engine repairs, transmission rebuilds, alignments and anything that needs the truck up on a lift. It is all done at 1665 Donto Way in Brooksville, RDI Power’s only shop. The on-site diagnosis and photos go with the truck, so the shop picks up where the technician left off rather than starting over.

Weekdays from 7:00 AM to 4:00 PM, anyone can call (352) 433-3800 for mobile service in Casselberry. RDI Fleet accounts get 24/7 roadside assistance; see Casselberry fleet maintenance for the program. The mobile diesel repair page explains on-site service in full, and mobile diesel repair in Winter Springs covers the city to the northeast.

RDI Fleet

Keep Casselberry trucks on schedule.

One shop that knows your trucks, a plan built around your operation, and a warranty in writing.

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  • Vehicle classesLight · Medium · Heavy
  • Fleet typesTrucks · Trailers · Buses
  • Fleet warranty2 yr / 24,000 mi
  • Roadside24/7 for fleet accounts
  • ServiceIn the shop or on-site
  • Shop hoursMon-Fri · 7 AM to 4 PM
Reviews

Their words, not ours.

★★★★★
“Amazing service and pricing! My old truck is back on the road and running great!! I will always bring my trucks to RDI for service! I know it will be done correctly!”
Diane B. · Google review · June 18, 2026
Google rating
4.6
250+ Google reviews
★★★★★

While traveling the check engine & alarm went off in our RV. RDI Power was able to squeeze us in on a Friday afternoon. We had multiple related problems and they were able to diagnose the issues. With Joe in parts and Jeremy in the shop these guys are very...

Steve M. · July 6, 2026
★★★★★

Awesome group of guys and girls providing awesome service and quality work. I’m so happy with my repair my work truck that didn’t run now running awesome! I recommend this place to anyone with a diesel or big truck! A place you can trust. Worth the drive or...

Google reviewer · June 18, 2026

Casselberry questions

My truck died on the US 17/92 flyover in Casselberry. What should I do before calling?
Turn on the hazards, set out warning devices behind the truck and get everyone out of the travel lanes. Then call with your direction of travel and what the truck did before it stopped.
Can a technician fix a diesel in a Casselberry shopping center lot?
Often, yes, when there is firm, level pavement beside the truck and room for the service truck. Let us know who manages the property so access is arranged.
Do haulers in Casselberry get after-hours roadside help?
Around-the-clock roadside help is for RDI Fleet accounts. Other customers can call for mobile service Monday to Friday from 7:00 AM to 4:00 PM.
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(352) 433-3800
  • Shop hoursMon-Fri · 7 AM to 4 PM
  • Address1665 Donto Way, Brooksville
  • Fleet roadside24/7
Vehicle type

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