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alright guys this is my problem and i cant seem to figure out where it is coming from. only does it when Im really getting on it hard. and ONLY does it when either im do a burn out or put it into 4wd. And go figure i did both today :hehe:

Alright so what happens is that the truck is like making this moaning sound at around idle to about 1200rpms. its a hardcore moan sound. And them my brake pedal acts all weird too, almost like its got alot of air in it. it seems like its got steps in the brake pedal, like it hops your foot a little bit. Really weird, I cant seem to figure where it is coming from, sounds like the turbo because when you rev it up real light and then get off you can hear it but then again i can hear it under my dash by my pedals. like the brake booster or master maybe? really weird, anyone else every experience something like that before? :dunno:
 

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PMR = JUNK
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Mine does it, im pretty sure its probably the vacuum pump. when you do a boosted launch, you really have to hold the brake hard because there is a massive amount of torque pushing your truck, and when you hold the brakes that hard things are probably gonna make some noise.
 

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Hey. I know that there was some turbo "drone" as they called it. Between 1200-2000 rpms (there was a turbo pedestal upgrade to fix). I know that when i get on my truck hard, it does the brake lock up thing to, where it almost feels like there are no brakes for a split second.
There is no super loud drone from it though, might be two different things going on.

Just my two bits.
 
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