Let’s call them window sliders

the plastic after market sliders upon real close inspection were the culprits they are not formed like the originals. the sockets are not deep enough to allow the pins to seat, which holds the shoe slider to far apart. i used the original plastic sliders they were not broken but a little yellowed and the windows slide okay, that's what turned this into a all day job i put it to gether with the after market sliders and with alot of force could barely move the glass up or down, i know there is no way that crank mechanism is going handle that much force. i know people on this forum hate complaints we should just smile and be so happy but that is not how change happen's exactly the opposite happens. anyone that has bought this kit for a 125.00 dollar's and can only use the 2 cheap pieces of plastic channel and feel good about there purchase i would just say you don't work for your money like i do