What gas engine do you have? V8 or V10? The 5.4 in the SD would be underpowered in most mtns while pulling a rig. You have 4 wheel discs, and while using electric trailer brakes, you'll have all the braking capabilities you'll need. The SD has a hefty frame, rear axle and suspension, enough to haul any two horse trailer. My only consideration would be the power factor on the hills.

A copy of the owner's manual will give you all the specs you need if you can't find them on the internet or the service desk of your Ford dealer.

Gard

I agree with Gard on being somewhat underpowered.  I have owned a Ford 5.4, V-10, and a three 6.0 diesels. Each engine certainly has its advantages and disadvantages. You will just have to be considerate of the engine power you have while towing.  I pulled a 16 ft gooseneck with three horses a few times with a F150 that had a 5.4 and I knew it was back there when I reached the hills.  I upgraded to a V10 and I knew the engine was there when I passed the gas stations.  Most people think that the F-250 will have the diesel in it when they make the statement that it should pull whatever you want.  You certainly have enough truck with regards to frame and suspension to pull what you want.  Just make sure you pay close attention to your driving and you should be make it. 

Dunagain,

I didn't mean to imply that your truck won't work for you because of its smaller engine; it will. I just meant that while towing in the mountains, you probably will not be able to maintain the posted speed limits. That's why they invented passing lanes.

When you're under a load for a length of time, you have to get a feel for the drive train. Don't just floor the accellerator and try to make the truck go as fast as possible. After the transmission downshifts and the motor accelerates, you will get into a range where you will want to back off on the throttle. The truck will be "more comfortable" in a slower rpm range and not running as loud. It will sound less stressed and be pulling easier. Watch your coolant temperature, and if everything is normal, that's a good speed to maintain. Your tack will probably be around 4k + or so. Your engine is an overhead cam design, which means that it's efficient, and make its power at somewhat high rpms.

When pulling hard, go by the engine rpms and engine sounds, not by your speedometer. Your SD is built for heavy work, and if treated well, should last you a long time. If your mountain driving only involves a small percentage of your total driving, your truck should suffice well.

Make sure your cooling system has new coolant, the transmission has a new fluid flush and filter, and your engine has the best oil you can buy, preferably synthetic. A new air filter and fluid check of the rear axle, air your tires, and you're ready to go. You have a good truck, enjoy it.

Gard

Gard