Customer service 2
I purchased my 2016 Thor Challenger 37kt back in December 2015. It's been in the shop 9 times. One of the main problems is a tracking issue. When you behind the motorhome you can see drive down the r...
Forum Discussion
Most likely cause is rear axle is out of alignment with the coach. The thrust angle is off.
There are other possible causes but a decent four wheel alignment should identify them.
You can do a sanity check on the thrust angle with a bit of string.
You will need two people to do this. Take a piece of mason's twine long enough to reach from behind the rear tire to behind the front tire.
Have the helper hold the twine around the rear of the rear tire. Stretch the string to the front tire. Now move the string at the front tire until it just kisses the outside of the front of the rear tire. Now either mark the front tire where the string intersects it, or measure to a reference point on the tire.
Repeat for the other side.
If the rear axle is aligned perpendicular to the front then the measurements should be the same on either side.
There are other possible causes but a decent four wheel alignment should identify them.
You can do a sanity check on the thrust angle with a bit of string.
You will need two people to do this. Take a piece of mason's twine long enough to reach from behind the rear tire to behind the front tire.
Have the helper hold the twine around the rear of the rear tire. Stretch the string to the front tire. Now move the string at the front tire until it just kisses the outside of the front of the rear tire. Now either mark the front tire where the string intersects it, or measure to a reference point on the tire.
Repeat for the other side.
If the rear axle is aligned perpendicular to the front then the measurements should be the same on either side.
