1:31 PM PT -- A source close to Caitlyn tells us her boys never communicated to her that they thought she was unqualified for the job, and she feels she's very qualified to run. We're told Caitlyn has teamed up with top GOP advisors to help guide her campaign.
Our source says the only one of her sons who voiced a concern about Caitlyn running was her son Burt, who was concerned about her safety and wanted to make sure she had top of the line security.
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, Brandonand 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.
As you know, Caitlyn went ahead with her plans ... but we're told her sons are upset she never took the family's feelings into consideration ... by the time she called them she had already made her decision.
Caitlyn's not doing much better with the Kardashians, including Kendall andKylie, as we first told you ... they won't be hitting the campaign trail to stump for her, and Kim's already clashing with CJ over prison reform.
For once, it sounds like the Kardashian-Jenner kids all agree on something ... Caitlyn shouldn’t be running.