Gliders 101: Five common questions about glider kits answered

| July 29, 2014
Glider kits in the midst of the assembly process at Fitzgerald Glider Kits' Byrdstown, Tenn., plant.

Glider kits in the midst of the assembly process at Fitzgerald Glider Kits’ Byrdstown, Tenn., plant. Today’s glider kits are taking off, offering the same amenities and similar resale value and warranties as dealer trucks. One of the biggest attractions lies under the hood: Pre-EGR Detroit 60 Series engines. Click here or the photo above to see a photo gallery of how glider kits come together at Fitzgerald’s plant. 

Despite the industry’s lackluster truck sales since the recession, Cookeville, Tenn.-based Fitzgerald Glider Kits has seen sales double each year since 2010, and it expects the trend to continue in 2014.

Though Fitzgerald concentrates its builds and engine programming on fuel economy and maintenance ease, its sales point to a growing trend for its owner-operator customers: the desire to run a new truck powered by a pre-exhaust gas recirculation engine.

Also, gone are the concerns from 20 or 30 years ago about gliders’ quality and resale value, says Jay Burgess, a buyer for Insurance Auto Auction, a used truck reseller. 


Glider bodies, chassis, rear-ends and wiring are fully assembled and delivered to manufacturers such as Fitzgerald, the largest glider maker in the United States, and Ervin’s, the second-largest, which then install the engine and transmission. Builders like Fitzgerald and Ervin’s have helped spur demand for new and used gliders. 

What’s the most popular glider equipment? 

Fitzgerald stocks its own engines, obtained from truck teardowns or salvage companies, says Tommy Fitzgerald, owner and vice president. It remachines and rebuilds them with remanufactured components. 

Fitzgerald uses only 2003 year-model or older 12.7-liter Detroit Series 60 engines that are torn down and rebuilt in-house. It couples them with remanufactured Eaton-Fuller transmissions purchased from Eaton. 

Ervin’s buys Freightliner “powered gliders” with remanufactured Detroit engines, 2003 and older, already installed, says Ken Eggen, director of business development. The company also uses reman Eaton-Fuller transmissions from the factory. 

Why buy a glider?

Three key benefits of buying a glider are lower upfront cost and the potential for both lower maintenance costs and improved aftermarket value, says Eggen.

Ervin’s sells Freightliner Coronado and Columbia models, and they cost about 10 to 15 percent cheaper than a similarly spec’d factory truck.

Gliders offer simple way to natural gas use: Glider kits can give owner-operators an easier, cheaper way to delve into natural gas power than buying a new dedicated truck off the lot, and for about $50,000 cheaper than a new natural gas truck off the lot. Click here to read more on dual-fuel natural gas gliders.

Gliders offer simple way to natural gas use: Glider kits can give owner-operators an easier, cheaper way to delve into natural gas power than buying a new dedicated truck off the lot, and for about $50,000 cheaper than a new natural gas truck off the lot. Click here or the photo above to read more on dual-fuel natural gas gliders.


A Coronado from Fitzgerald starts at about $109,900, and its Peterbilt 389 starts at $126,500. Compared to a similarly spec’d factory truck, that’s about 25 percent cheaper, says Tommy Fitzgerald. 

Initial equipment costs aside, Fitzgerald concentrates its builds on lower cost of ownership through fuel economy and lower cost of maintenance. 

“We set the engine up to where it can be more efficient,” says Tommy Fitzgerald. Fuel economy benefits, he says, are achieved through special programming of the engine’s electronic control module and from the external and internal parts used in the engine rebuilding process.


Gliders offer simple way to natural gas use

Note: This story is part of a larger package on glider kits and their viability for owner-operators. Click here to see the main story.  Glider kits ...

Fitzgerald says that based on customer feedback from real-world testing, the company pegs the mpg of its kits at 7 or higher.

The company also has its own routing placement for hoses and wiring designed to make maintenance work easier. “Through fuel mileage and maintenance costs, it has a lower cost of operation year by year,” Fitzgerald says.

Ervin’s tailors its sales to “high-idle” applications such as mining, logging, construction, bulk transport and oil field hauling. Diesel particulate filters and EGR engines don’t fit these applications as well as a non-EGR engine, Eggen says.

Long-haul applications may not see the same benefits as the higher-idle applications because DPFs on post-2007 trucks are able to regenerate more effectively, he says.

Perhaps of most interest to many buyers, gliders employ the simpler, proven technology of pre-EGR engines, says Tony Mohler, used truck manager for Nashville Rush Truck Center. “There’s less that can go wrong as far as not having the aftertreatment systems,” Mohler says. “And styling-wise, a guy can get a brand new piece of equipment and theoretically save some money.” 

How strong is resale value?

IAA’s Burgess sees glider kits with pre-2003 model engines getting as much as $10,000 more in resale than comparable factory trucks “because they’ve got pre-emissions engines. People are willing to pay more money for that.” 


Photos: How gliders come to be

Note: This story is part of a larger package on glider kits and their viability for owner-operators. Click here to see the main story.  Fitzgerald’s plant ...

Burgess scours the Southeast to find trucks for auction, and one of his main jobs is to tell customers what their trucks are worth. He connects about 250 truck sellers a week to auctions, he says.

Auctioned gliders with reman engines bring about 7 to 9 percent more over comparable trucks, Burgess says. “The trucks are of just as good quality as any new truck that goes down the assembly line,” he says. 

Gliders used to carry a stigma, says Robert Fitzgerald, co-owner and president at Fitzgerald. “People always believed gliders on the resale side are worth less,” he says. “But what we’ve found now that we’ve developed a market is that we can actually get more on the backside.” 

Ervin’s Eggen says owning a glider made with original manufacturer’s parts “takes away fear of sliding in resale value.” Like Fitzgerald, Eggen says he’s seen Ervin’s trucks hold their value better in the aftermarket than factory trucks. 

How do warranties work? 

The glider shell – cab, chassis and wiring — comes with a 1-year, 100,000-mile factory warranty, says Tommy Fitzgerald. Peterbilt and Kenworth also have a standard 5-year, 750,000-mile warranty on the rears, and Freightliner has a standard 3-year, 300,000-mile warranty on the rears, he says.

Eaton-Fuller reman transmissions come with a 3-year, unlimited mileage warranty. The reman Detroit engines come with a 3-year, 300,000-mile warranty.

The engine warranty also can be done through Fitzgerald, Tommy says. The company also offers a 5-year, 500,000-mile upgradable nationwide warranty that’s handled in-house.

The warranties are good at any Freightliner or Detroit authorized repair shop, and all the warranty information is already in the system, Eggen says.

What are potential hang-ups? 

• As for resale value, aftermarket sentiment varies, says Mohler. Many dealers won’t buy or trade gliders because dealers can’t be sure of the origins of the truck’s componentry, nor can they apply aftermarket warranties to them as easily. Reputable manufacturers like Fitzgerald’s and Ervin’s can mitigate these concerns, though. 

• California requires a particulate filter in engines older than 2006. Complying with this to enable running in California would mitigate some of the benefits sought in the first place. Because California emissions regulations sometimes have been adopted in other states, avoiding business in California might not be a long-term solution. 

• Some gliders may not have access to the service network that new trucks would, depending on the components used in the build, Mohler says. 

  • Pingback: Gliders 101: Five common questions about glider kits answered - Truck Trends

  • Rmon66

    I actually own one of Fitzgerald Coronado 2013 , mileage sucks , can’t even get 6mpg ..

  • Djalbar

    I got Pittsburg power for my,and mpg jump to from 6,0 to 7,7 and I pull rgn…..

  • George

    You cant get anything good from PP anymore, the EPA killed them.

  • Turbosaleen

    I get 7.5 to 8.2 mpg out of my 12.7 now (2002 Columbia ) with 1.3 million on original motor and transmission.. I think I’ll just rebuild them keep what I have

  • localnet

    Do you have an APU on that rig?

  • Ken

    I have 3 Fitzgerald 2013 Coronado’s and they all get OVER 7 mpg.

  • David

    The company I drive for has 15+ Coronado’s and all are above 7mpg. But as any truck that depends a lot on the driver. I almost never fall below 7.5 and average around 7.8 each month. I have nothing bad to say about ours that came from Fitzgerald.

  • DonM

    Have you taken it back to have the timing checked? What do you haul, routes, weight? City driving %, road driving %. There’s lots of variables to consider.

  • DE_from_NC

    No George not any more !! The PP boxes are back, Bruce and the guys proved their wares. They don’t have all of the models available back yet (Mack, Volvo & Mercedes) but the Detroit, Cat & Cummins stuff IS back on the website for purchase.

  • hillbilly

    I run a Fitzgerald 09 Coronado with the full step I’ve got 668000 on it and I’m getting Close to 6mpg (5.94) I run 70+ mph and idle when not driving I do stepdeck and heavy haul and norma I’m near 80000

  • Dariusz

    Can you tell me if the prices on their trucks are negotiable? I’m looking at a 2015 KW T660 flat top they have coming in on 04/06 then I would have to wait another 5-6weeks for it to be done. Since I’m doing everything over the phone, I have no clue about how to negotiate with them. they want $5000 to put my name on the truck. Their price is $129,500 with a 13 speed. What should I offer? If do they only sell for their price. Thank you.

  • Tom Fuller

    I have a Ervin Glider and love it. Really enjoyed working with the team at ErvinUSA.

  • Rick

    Why idle the truck absolutely no need to unless it’s below freezing or above 90. Wish they’d put price of fuel up to $10.00 a gallon then maybe you morons would shut truck off at nite so can sleep

  • Scott

    WHY are you calling people names, you FuckStick? Oh hey look, I did it too.
    IF it’s 88° outside, inside the truck is going to be a LOT hotter.THINK sun beating on the tin can that a semi truck is.
    Most people don’t enjoy, or can’t sleep when it’s that hot inside the truck.

  • Steve Griffith

    You obviously don’t drive a truck. If it’s 80 out inside the truck can get up to 100 easy. Please go sit in your car when it’s 85 out in Texas with no breeze all day without turning on your ac.

  • Pingback: Transmission Repair Questions In Littleton Co | Auto Repair Denver

  • Pingback: HVAC Services Raleigh | Truck Ac Repair In Tysonville Nc

  • Ethan Johnson

    In 2016 the whole emmisions thing is starting to be a bad meme.

    I just turned over 100k in 8 months in my 2016 Pete with Cummins isx. I haven’t done anything but change oil. All oil samples are great. When I get to 200k I’ll replace the doser nozzle preemptively for 200$ and be on my way. I pull stepdeck and I can be between 6-7 depending on whats on the deck. I am seeing around 6.4 most often But this is a 550hp 3:55’s puller so I am happy. Bobtail I’m 13mpg highway.

    The 99 Detroit I ran before and still have runs great. But it never got 7mpg either. Maybe got close to that before biofuel, running midwest flats. Maybe.

    Either way I can always take the egr and dpf off my Cummins after warranty and have a 700hp 7mpg beast. strives to maintain an open forum for reader opinions. Click here to read our comment policy.