GM Cutlass RWD 1970-1987 Repair Guide

Hitch Weight


Figure the hitch weight to select a proper hitch. Hitch weight is usually 9-11% of the trailer gross weight and should be measured with the trailer loaded. Hitches generally fall into three types: those that mount on the frame and rear bumper the bolt-on type or weld-on distribution type used for larger trailers. Axle mounted or clamp-on bumper hitches should never be used.

Check the gross weight rating of your trailer. Tongue weight is usually figured as 10% of gross trailer weight. Therefore, a trailer with a maximum gross weight of 2,000 lbs. (910 Kg) will have a maximum tongue weight of 200 lbs. (90.8 Kg). Class I trailers fall into this category. Class II trailers are those with a gross weight rating of 2,000-3,500 lbs. (908-1589 Kg), while Class III trailers fall into the 3,500-6,000 lbs. (1590-2725 Kg) category. Class IV trailers are those over 6,000 lbs. (2725 Kg) and are for use with fifth wheel trucks, only.

When you've determined the hitch that you'll need, follow the manufacturer's installation instructions, exactly, especially when it comes to fastener torques. The hitch will subjected to a lot of stress and good hitches come with hardened bolts. Never substitute an inferior bolt for a hardened bolt.