stealthperf

I have a 2004 2500 non HD Silverado ccsb. It's got the 9.5 rear diff. I had my gears replaced last summer and the mechanic said the stock g80 was in good shape... Just worried about having it fail as horsepower goes up... Any idea what they are usually safe to? Thanks.

FFDP

iTrader: (2)

They are crap from the factory if they see abuse.

They can hold power but it's when that power starts spinning the wheels and makes the G80 do what it's designed to do is when they fail. Sudden shock or constant abuse to the diff will cause the part to fail. I'd replace it if you plan to add more power on a heavy truck like that.

Blown06

iTrader: (32)

I ran the stock G80/3.73 rear in my 06 for a while back when the truck was on the street. Truck was around 500-600 rwhp at the time. This was back in my 100% bone stock suspension/wheel/tire days, so it had the factory General rubber on the back. The fact that it was impossible to hook (rolling 60 mph burnouts at ease) probably helped the thing last a lot longer than it should, but at the track after about 10-15 hits it started getting very temperamental and eventually would just set a "one tire fire" anytime it was on good tires. Probably got a decent 2000 street miles and 10-15 passes out of it before it stopped working. Luckily it never exploded, it just quit working.

madmann26

iTrader: (7)

Mine was replaced when I had the rearend rebuilt. The spiders were missing teeth.

stealthperf

Okay, thanks guys.. I'll put it on my to do list for next spring.... I'm just getting it figured out from this springs round of upgrades. I park it in October and then get it back out in May... I put a new converter and shift kit in this year. I doubt if it will do a 60 mph burnout but it will blow the tires off at 35mph. Any certain brands to consider?

madmann26

iTrader: (7)

TruTrac.

They're proven but not cheap. The one for the 10bolt 8.6 is $500.

stealthperf

Cool,thanks! Looks like the one for the 14 bolt 9.5 is about 560ish.

1994Vmax

iTrader: (4)

Detroit Locker. I have one in every truck I own..... The gov lock is just a stupid piece of garbage even from an operational standpoint. You won't probably ever hurt the one in your 9.5" ( same rear as both my 04 and 05 have) but something other than the gov lock is a huge upgrade. I just swapped my 04.... if I didn't tell you it had a locker in... you wouldn't even notice it... that's how not aggressive they really are.

Blown06

iTrader: (32)

Everybody has there favorites but I can tell you first hand, a clutch type Eaton is the way to go. I think the TruTrac was originally designed for Honda Civics with a cold air kit. lol

Just fooling about, but I am serious when I say the clutch type is the way to go for the street/track.

1994Vmax

iTrader: (4)

Clutch ones burn out and stop working too easily.... but at least like a lot of other designs they are rebuildable so that's a plus I guess. That's where all the love for the TruScrap comes from is because people somehow think they are maintenance free..... disregarding the fact they rely solely on the worm gears binding in the carrier to operate. They also peg leg like no other on slippery surfaces... Different strokes.