Feels like it is downshifting while sitting at traffic light, feel a 'bump"

[klutchdust]

Make

Toyota

Model

Tacoma

Year

2007

Miles

61K

Engine

V-6

2007 Toyota Tacoma, original owner 61,000 miles. Pull up to a light, waiting for light, then feel a bump after being idle for 10-20 seconds. The best way to describe is if it were in neutral then you put it into drive a slight bump. A bump like someone tapped the bumper with their foot type bump. Truck runs great, cranks a bit before it starts but so does every other Toyota truck around that year. Someone mentioned fuel line. IDK.

 

[grcauto]

Who knows. It hiccups.

 

[Mobile Dan]

Same thing with AC on or Off?

Check for loose or missing mount bolts at rear of transmission.