2002 Ford Ranger with 4.0 and AT. When I am at a complete stop, like at a traffic light with my foot on the brake, I feel the truck trying to surge forward in little movements, kinda like a bump forward. Any ideas?

 

what rpm? how many miles on truck?

 

At idle - 207,000 + miles

 

my suspicion if this has been slowly developing based on vehicle mileage is a transmission rebuild or replacement is required. this is based on two previous automatic vehicles i had. slight chance related to pressure regulator. oil and filter change may help but my suspicion is more is required than that. good luck.