Indicated by the name, non prescription eyewear, without a lens prescription, also called clear lens glasses, is less important in function, but is quite critical and helpful in enhancing the wearer's facial look.
The 2011 Buick Enclave is rated for a maximum tow of 4,500 pounds. Back the Enclave up to the trailer's tongue. Ask someone to stand by and direct you. When the Enclave is in position, lower the trailer coupler onto the Enclave's hitch and lower the latch.
Tow ratings are determined by various factors, so to say the transmission is the reason would be speculation. Note that the 2015 Outback, which uses the same engine and CVT, can tow up to 2,700 pounds. 2014 tow rating.