Let me start out by saying I am towing stupid. I can admit that. I have a 2007 1500 Thunder Road with the 5.7L Hemi. I am researching on what I need to tow a camper but again I resay, I am trailer/towing stupid.

How can I tell what class receiver I have? Class II, III, what?

 

Take a picture and let us see. easiest way I would say

 

I have a 2007 1500 thunderroad with the hemi as well. My truck came with the towing package which included a class IV hitch and the 7 pin connector. You may want to look on the window sticker that came with the truck (if you have it). I bought my truck to tow a camper for my family and learned alot during the process. Let me know if I can help.

 

All rams came with a two part class III hitch (it's bolted to the frame and tucked under the bumper)...if you have the receiver bolted to the bottom of it then you have a class IV.

This is what it looks like without the receiver that all 3rd gens have...most get the receiver from the factory so they never know the difference. As you can see in the pics, you could but a ball through the middle hole in the bumper and pull with a class III rating since the weight is actually on the hitch...not the bumper.

 

One thing I found out is that if the trailer you are towing has electric brakes, then you have to have a brake controller installed inside your truck. Electric brakes on a trailer help the trailer stop so it's not all on your truck's brakes. The brake controller lets you adjust how much the trailer's brakes kick in. We have a 3 horse slant trailer that has this feature. My wife's Suburban towed it just fine; apparently the 'Burb has a built in brake controller. When I connected the harness to my truck, the electric brakes on the trailer locked up and I could not tow it with the harness connected. In the owner's manual, there is a section on towing and it states that you need the brake controller. Per the manual, trailers over 2,000lbs have to have this feature. I think you can get a brake controller installed for less than $150 from what I have heard. I need to get one soon. When I do, I will let you know.

 

http://www.etrailer.com/faq_brakecontroller.aspx

good link on brake controllers.....kind of off the topic, but relevant.

 

My 2004 RAM 2500, has a factory CLASS-IV... see picture. It is different than the 1500 shown above. The e-brake controllers are common for gooseneck trailers, and 5th wheel RVs.. but for towing other toys (boats like me), sometimes that have inertial brakes built into the trailer (no controller). So the e-brakes are only if you have e-brakes.. I know most regs now are anything over 2000lbs. But I'd personally say you'd be fine up to 3500lbs. Brakes do make life easier though.
Here is the pict of the class IV receiver: http://www.shnool.com/images/ram2500/0927080928c.jpg

 

It's the same as mine that I posted...the pic you posted is the receiver that bolts to the class III hitch which makes it a class IV. Look under your truck sometime..it's not that complicated man.

 

Here's where I mounted my trailer brake...


It's handy if you have the space and beats hitting your knee if it's mounted under the steering column.