If I do a lot of continuous braking (heavy traffic) braking becomes very hard... almost like I have to physically stop the truck with my body weight
Thing is - which I don't understand - is this only happens when I'm not using the gas... for example it is worse downhill - brake and coast, brake and coast - and not noticeable uphill - brake and accelerate, etc.
If I'm going downhill, in neutral, but accelerating the motor the problem also goes away.
It's a 1979 BJ40 with original drums. No leaks that I can tell. Recently replaced the booster. Can anyone explain what's happening?
Thing is - which I don't understand - is this only happens when I'm not using the gas... for example it is worse downhill - brake and coast, brake and coast - and not noticeable uphill - brake and accelerate, etc.
If I'm going downhill, in neutral, but accelerating the motor the problem also goes away.
It's a 1979 BJ40 with original drums. No leaks that I can tell. Recently replaced the booster. Can anyone explain what's happening?