I've heard it's a problem on the 05,06 and possibly the 07. Does it in my old 05 that I still have (the white mustang in the background of my avatar pic)
It Revs up like it was gonna shift, pause, and then BOOM slam into gear.
Rumor was it was nature of the beast, nothing to worry about. At 160k miles now the trans is still slamming into gear and still working just fine
What I do when I notice Its gonna slam gears is I quickly shift it into neutral and then back into reverse. Good to go
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