i have an 01 ap1 with 63k on it now. i notice a good whining sound coming from the rear end. its not the tires. i changed my diff fluid about 2k ago and it was clear.. no flakes of metal shavings or anything. im just wondering if the whining is a sign that it is going to blow up. if it is the case, where can i find a stronger diff for a reasonable price(well s2k reasonable). i plan on going boost in a few months. it is my dd so id rather get this taking care of asap rather then it break on me. im looking for it to hold around 450whp. it will only see the dragstrip a couple of times but mostly a fun street car.

 

Sound like a supercharger?

 

lol yeah it does. like a stock colbalt ss(supercahrged one) lol

 

That's the diff. It's either a snapped tooth, or it's worn itself out of spec. Have it rebuilt, or run it till it blows and order a spare.

 

before my diff went out there was whining noise from the rear that only occurred during acceleration and made clunks during slow wide turns, hope that helps and gl

 

get a puddymod diff for an upgrade

 

yeah its mostly during decel and a little bit in accel in first gear. it def is my diff lol i have been doing some 8k launches at the track. i knew it was going to go.. im suprised it didnt snap on me. where and how do i go about getting a built one and what kind of price range are they in?

 

well.. doing 8k drop will do it.. if you are going Boost with 400+ you should looking into a Inline Pro kit, then you will not have to worry about the diff again. or the puddy diff is good to..

 

Yeah puddy sent me a pm and recommend his stage two with the polished gear but does anyone know how they hold up from experience? on launching and things like that. I plan on runnin 2 maps. A dd one with around 340whp and a one with around 450 whp. I just don't want it to break lol

 

I know how you feel.. i went with the inline pro kit.. its expense but worth it. I have the R200 rear end.. they are pretty beefy