- We provide complete mechanical services for all brands of heavy duty trucks. All truck repairs are completed in our preferred heavy truck mechanical shop by certified mechanics. You do not have to be a customer of RVH to have your truck serviced by us.
- We provide axle singling services for Volvo and other brands. We will single your existing truck. We have the skills and knowledge to properly address ABS, VEST and other integrated safety systems when removing an axle. Complete reprogramming is included in our singling. And we always extensively road test our singled trucks.
- We offer repairs, routine maintenance, and general mechanical services. We understand the RV lifestyle, and focus on preventing breakdowns, NOT just passing a DOT inspection.
Singling Your Truck
Many trucks used as RV Haulers have one of the rear axles removed. This process is called “Singling”. It sounds simple, but it can be fairly complex. Especially with the newer trucks with ABS, Traction Control, VEST, and other computer controlled stability systems.
Not only do you have to physically remove all the axles, but you have to properly re-establish the computer sensors and reprogram the computers to take into account the removal of an axle. Otherwise, your safety systems are rendered inoperable.
There are pros and cons to singling – as with anything.
In order to determine if singling the truck is appropriate you have to fully understand your cargo carrying requirements. If you intend to carry a lot of weight, or a lot of weight in the forward (drom box) position then singling is probably not a good idea. The reason is that you could overload your front axle. Especially if you have a large displacement engine. Before singling you need to weigh the front axle and determine how close you are to the limits. This will also help in determining the rear axle location to use. Using the rear (rear) position will result in more weight shift to the front. Using the front (rear) will reduce this, but you will still get weight shift to the front.
If you intend to carry any car other than a Smart, then you probably need to remain tandem. Same with other heavy deck cargo in a forward drom box. This is likely to overload the front axle. Another consideration is the type of bed you are adding to the rear. If adding a hauler body (with side compartments) then you may decide to move the fuel tanks to the forward position. This will shift weight to the front axle – some of which will be compensated for by the weight of the hauler body, or by any weight you add to the rear of the body – behind the axle position – to act as a cantilever force. It is all a delicate balancing act.
We can help you make the decision to single or not. We typically single into the “mid plus six inches” axle position, but depending on the cargo carrying requirements this position can vary. We have singled many, many trucks successfully and can do yours as well, if you decide that is the proper direction for your project.
Pro’s of Singling
- Better fuel mileage – up to 1.0 mpg better.
- Less length – easier parking and maneuvering.
- Tighter turning radius.
- Less wear and tear – fewer U-joints, less drive lines.
- Fewer brake parts to maintain and inspect.
- Fewer airlines to develop leaks.
- Fewer airbags to decay and need replacing.
- More storage space for boxes in the hauler body.
- Perhaps cheaper to build a body.
- Fewer aluminum wheels to keep polished.
- Fewer tires to replace and maintain – less checking of air pressure.
- Less tire pressure monitors and less Crossfire air balancers to buy.
- Higher resale value as an RV Hauler.
- In some cases easier to license, register and insure
Con’s of Singling
- Less weight carrying capacity. This can be a serious – depending on your pin weights and what you plan on carrying. If carrying any car other than a smart we advise you to remain tandem. Or to very carefully consider removal of an axle.
- The cost – this can vary upward from $6,000 depending on what is done during the singling process.
- Aggravation of ensuring the driveline angles are correct and properly balanced.
- Complications with reprogramming the computers – this must be done by Volvo.
- Less brakes – although braking may be more effective because of tire contact area vs. weight on tire patch.
- Maybe less traction. This will vary on circumstances.
- Some may prefer the aesthetics of the tandem axle “look”.
More details on the conversion process are in the two videos, below.