I 'm sure the engine can be turned up but will the tranny handle it?
Here's My
. Keep your A3 the way it is and do all the PM and the tranny flush.
Get the appropriate brakes and controllers for your trailer for your toys to mate up to your A3 in a safe operational manner.
Plan your route and travel it during least populated times such as 3 am Saturday or Sunday night. Put reflective danger tape on the back of your trailer and pull it at 45-50 MPH. How often are you going to pull this rig any way, 1-2 times a month?
I would suggest a more appropriate civi rig if you were going to do this every day during a work compute such as pulling a job box to and from a site. But for a weekend jaunt to a recreational area just travel the route during off times and camp out until the area opens.
The A3 is a great truck but a highway speed tug it aint. The tires are not up to snuff for the rig. They are only inflated to 45 psi at most and they are rated to 80 psi so they have been abused since they were installed. The A3 rims will only go to 60 psi so another strike.
I know you asked about how to tune the CAT engine and I rambled, but I do that
I enjoy my A3 mostly in low range!
opcorn: