RV & Motorhome Transmission Trouble in the Coastal Bend? What to Do Before You Drive In

If your RV starts shifting late, slipping or showing a warning light, pull over somewhere safe if it feels unsafe and call the shop before driving in. Large vehicles need a shop that can fit them and handle the work. Have the year, make, model, dimensions, transmission details and symptoms ready.

Cooler months bring plenty of RVs and motorhomes through Corpus Christi and the Coastal Bend. When a big rig starts shifting late, slipping or throwing a warning light, it can put a whole trip on hold. And unlike a car, you can’t just pull an RV into any shop.

Greatstate Transmissions has served Corpus Christi since 1978. Here’s what to notice, what to tell the shop and how to get your RV or motorhome looked at the right way.

Pay attention to changes in how your rig drives, especially under load:

• Warning lights on the dash
• Changing shift behavior: late, harsh or unusual shifts
• A concern that shows up while towing or carrying a load
• Vibration, leaks or new noises, which may involve driveline parts beyond the transmission

If something feels unsafe, pull over somewhere safe and call before driving farther.

Large vehicles need a shop that can physically fit them and handle the work. That’s why Greatstate asks RV owners to call before traveling to the shop. Have this ready:

• Year, make and model
• Vehicle dimensions
• Transmission information, if known (including the Allison model, if your rig has one)
• The symptoms, and when they happen

We’ll confirm whether the shop can accommodate your vehicle and the work it needs before you make the trip.

Many motorhomes and diesel trucks use Allison transmissions. Greatstate provides Allison transmission service for suitable applications, including electronic diagnosis alongside mechanical checks, plus fluid and filter service and cooler line repairs. Service availability depends on the vehicle and application, so start with a call.

Context helps the diagnosis. Let us know:

• Whether the problem appears while towing (and what you’re towing) or carrying a load
• Your recent service and maintenance history
• Where you’ve been driving and in what conditions

Heat and heavy loads are tough on transmissions. Our article on why transmissions overheat explains why.

• Free diagnostics with repair
• Clear explanations. We explain the findings so you understand what’s being recommended and why.
• Honest timing. Turnaround depends on what the inspection finds, the vehicle and parts availability. Ask about scheduling and when to expect your next update.
• Warranty you can ask about. Coverage depends on the work performed. In-house transmission builds carry an advertised 3-year/75,000-mile warranty, and manual transmissions and clutches carry 12 months/12,000 miles. Ask the shop for the written warranty, conditions and exclusions for your repair. Warranty details.

Fleet operators can talk directly with the shop about the number and type of vehicles, service history, scheduling needs, fleet pricing and scheduled service plans. See Fleet & RV Transmission Service.

Greatstate is a family-owned shop at 3487 S Padre Island Dr in Corpus Christi, open Monday–Friday 7:30–5:30. We serve drivers from Portland, Rockport, Port Aransas, Ingleside, Aransas Pass, Kingsville, Robstown and more. See our service area.

RV acting up? Call (361) 855-4637 with your rig’s details before you head our way.

Hero image: representative photo of a heavy-duty transmission inspection, not a customer vehicle.