Hey guys, taking my truck to the dealer soon for some repairs so I put the DPF back on just to avoid any problems. Figured I'd post a few tips I found today that made my job of doing this a bit easier, in case anybody else has to do this job.
1- Use a low profile creeper. You will spend several minutes going back and forth between the front of the DPF and the rear of it, its much easier to roll on a creeper as opposed to sliding on your back.
2- Buy one of those square dolly/furniture moving carts. This is helpful to roll the DPF under the truck and line it up prior to connecting it. You may have some other type of roller cart that you can use this is just what I had available to me.
3- Buy a ratchet strap. This is a lifesaver when it comes to connecting the rear of the DPF to the exhaust pipe. Just make sure the little tab on the pipe lines up with the groove so it locks into place. You will see what I mean when you are under the truck.
4- Make sure you have a swivel socket and at least a 6" extension to tighten the bolts up at the front of the DPF, near the top.
5- I removed the brackets from the frame that hold those rubber braces to the DPF. Removing the bracket only takes unscrewing 3 nuts, as opposed to trying to pry off the brackets and busting up your knuckles. Prior to putting the DPF hanger back into the rubber brace, shoot some WD-40 in there to give you lubrication.
6- Use WD-40 on the joints of the pipes to loosen the old ones and lube the new ones prior to doing anything.
That's how I managed to re-install my DPF today by myself and not hurt myself and break anything in the process.