2nd Gen Non-Engine/Transmission Hard Brake Pedal

[JamesPhillips]

I have a 96 2500 2wd extended cab. When I first start the truck and put it in gear, from time to time the brake pedal is very hard and the brake light is on. This only last for a few seconds but it seems that it's becoming more frequent. To me, it seems like a problem with the master cylinder or booster. The mechanic at the Dodge dealership told me that this was normal and not to put my foot on the brake until after starting the truck and letting pressure build in the booster. Does anyone have any thoughts on this topic?



Thanks,

James Phillips

 

[jkern]

my 99 does the same thing. i think that it is a vacuum leak that bleeds off in the vacuum booster/acumulater for the power brakes. when you first start the truck and the pump makes vacuum then it returns to normal pedal feel.

 

[Extreme1]

The plastic fitting that the vacuum hose on the booster attaches to has a check valve in it. After the brakes are working properly, shut the engine off, wait a couple minutes and see if there is still proper pedal feel. If not, try clamping the vacuum line with the engine running, and see it that does it.



It could be either the check valve or the booster might have a very small leak and leak down over time.