hillbillygrandma 0 #1 Posted August 9, 2020 The idler pulley does not disengage the drive belt on my neighbor's suburban 401. It's impossible to shift into gear or shift gears without grinding. The oil in the transmission is very old. Could that be the cause? Share this post Link to post Share on other sites
wallfish 17,079 #2 Posted August 9, 2020 The belt must slip around the engine pulley when the belt tension is released with the clutch/brake pedal. The belt guard must be installed because it supports the belt loop around the pulley. If you don't have a belt guard, small guides can be made out of 1/4" rod. Share this post Link to post Share on other sites
hillbillygrandma 0 #4 Posted August 9, 2020 Thank you very much. I'll try those suggestion after supper. Share this post Link to post Share on other sites
