hydro boost issue?
 

OK guys how about this- When I make a right or left turn the brakes apply. The sharper the turn the harder they apply.
'98 12v with about 500,000 mi 4x4 daully 6sp conv 4 in exh 16cm turbo housing exhaust brake with 60 lbs springs ats mani #11 fuel plate big air filter

Are you positive it's hydro boost? Because only a very specific few 12v's actually had hydroboost (I wish I remembered the numbers/years etc). How do you know the brakes are applying when you turn?

:humm::humm::humm: How do you know when your brakes are applying :ouch: Damn windshield :c::c::c:

Production date 10 '97 club cab definently hydro boost. In a low speed 90 degree turn you can feel the drag and notice the brake pedal moving

Well I'm not in your shoes so I'm not certain.. but these hydroboost pumps are goofy. They are tied into your brake system, so it's not unusual to feel the pedal pulsating etc. But these trucks are huge; when turning at full lock you are creating a lot of drag, so it "feels" like the brakes are put on, but it's just drag thats killing your momentum.

I bought the truck new and currently drive about 2500 miles a week pulling a 48 foot trailer. This is a new occurance. It would make sence that the hydro boost was malfunctioning. I was hopeing that somone else had run into this and could confirm the guilty part.

Well heres some personal experience with the hydroboost; keep in mind my cummins did NOT do this though..
In my 7.3 psd, if I tapped the brakes repeatedly while going slow and turning the truck, or while parked and cranking the wheel and tapping the brakes, it would pulsate the steering wheel. They are a system thats completely connected to each other and share functions. If your power steering or braking system fails, so does the other. I say stick some Lucas stop squeel or whatever in it and see what happens. That stuff rocks man.

I've never opened up a hydro boost is it as simple as an o ring or lip seal. Are there over haul kits available

Most people just replace them. I personally think it's a pain in the Richard. Theres a good amount to them.

thanks for your help