Caitlyn Jenner's ruffling all kinds of feathers within the family in her bid to be the next governor of California ... her sons didn't want her to run, and they're embarrassed she is.
Sources with direct knowledge tell TMZ ... the Jenner bros -- Brody, Brandon and Burt -- don't feel she's qualified for the position and they strongly believe she shouldn't be mounting a campaign.
Our sources say Caitlyn called some of her kids the night before publicly announcing her decision to run, and her sons strongly suggested she pump the brakes and scuttle the whole thing.