vented rear end ?
Thread Starter
Racer
Joined: Jan 2005
Posts: 356
Likes: 0
From: Lakeland Florida
vented rear end ?
Just in front of the rear wheel openings, at the bottom of the rockers, are what appear to be vent tubes leading toward the rear end. Does anyone know what these are for...ventilation or ? They look like they go behind the wheel opening baffles, but I can't see where they lead.
Melting Slicks
Joined: Jan 2006
Posts: 2,713
Likes: 0
Originally Posted by bj33813
Just in front of the rear wheel openings, at the bottom of the rockers, are what appear to be vent tubes leading toward the rear end. Does anyone know what these are for...ventilation or ? They look like they go behind the wheel opening baffles, but I can't see where they lead.
As to your general question about venting of the rear end, I read a TSB or tech report from GM and it stated that the diff housing is vented, but through a check valve, biased to allow pressure out only. So that means that if there is ever any need to expel gas, it can always get out, but what that also means is that most of it's life, your diff will be operating with a vacuum on it. So when you crack open the plug for refill, be aware that you may hear some very strange noise. The techs reporting it said it sounds like air coming out, but according to tech data (and by design), it is actually air rushing *in* to the partially evacuated diff casing.
Thread Starter
Racer
Joined: Jan 2005
Posts: 356
Likes: 0
From: Lakeland Florida
Guess I'd make a lousy engineer as I sure can't see how that would vent the brakes...doesn't appear to go near the inside of the wheel wells., but between the wheel well liner and the sub chassis. But thanks.
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Originally Posted by EuroRod
A little more detail.... that opening connects to a plastic duct that directs air to the backside of the rotor on each side. It's really pretty neat. Just pull the rear wheel and you'll see it.
