TH400 skips 2nd gears goes right for 3rd - The 1947 - Present Chevrolet & GMC Truck Message Board Network

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TH400 skips 2nd gears goes right for 3rd

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02-12-2014, 09:35 PM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,973	Re: TH400 skips 2nd gears goes right for 3rd You need to adjust your vacuum modulator. Pull the vac hose off and use a small flat screwdriver and turn the screw out (it's inside the hole) 6 turns to start. If it gets better then turn it out 6 more.

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