Is 3/4 ton enough for a 3665re?

[akf15e]

The only way to find out is to weigh it. Find a CAT scale nearby and weigh all 3 axles. I imagine you will be over for GVWR for your truck. I was very worried about too much rig for my truck, but once I weighed everything I am quite at ease with my decision so far. After more towing with it, I may change my mind, but I kind of doubt it.

My actual pin weight is only slightly more than advertised and is about 17% of total trailer weight. I am well under on axle and tire ratings and 1 ton under my combined vehicle rating of 22K lbs. With full fuel, DW, 170 lbs of dogs, a 16K hitch, a 6 ton floorjack, a kingpin tripod, and 100 lbs of firewood, I am about 550 lbs over GVWR for my GMC. That is the only weight I exceed. When it's just DW and I, we will only be about 150-175 lbs over GVWR.

Certainly a 1 ton will allow you to remain within GVWR. But before you make that purchase make sure you know the actual weights of your rig (loaded), your tire load ratings, axle load ratings, etc. so you can make an informed decision.