The_Assassin

yea most likely the installer messed up or this is a bad mod for auto z

Bmurray350z

iTrader: (34)

well obviously 4.36s in an auto is retarted.. but still wouldnt just cause a diff to explode.

pss350z

iTrader: (6)

Maybe its the fact that the diff is turning 1/3 faster than stock.... Did you ever look underneath and notice it glowing red?

JustinZ33

What do you think he could have messed up?

No I didn't car ran and responded fine to the gears. I checked and the drive shaft is still spinning so I'm really hoping it's just the diff that blew and not the trans

That plus the nos maybe it was too much

Bmurray350z

iTrader: (34)

Diffs have to be installed and set PERFECT. Backlash, etc has to be spot on. I bought a used diff once, and the installer forgot to loctite the ring gear bolts which caused a bolt to come out, get lodged between the housing and the ring gear and boom... diff blew.

But it's hard to say what caused it. It's easy to open it up and look though. So do that and post some pics.

cashmoney03

Back lash, pinion depth, torque on the bolts, bearings not pressed on right, bearing cap bolt torque, lock tite, not enough fluid. Quite a few things.

guitman32

iTrader: (15)

So what actually happened when the "diff just blew"

JustinZ33

Car on lift now I'll have info for you guys in a few hours

JustinZ33

Turns out it was the factory LSD that failed

Bmurray350z

iTrader: (34)

So how did it fail? Post a pic or something.

Or did the shop tell you that so they're covered for their install mistake lol

JustinZ33

Nah there's chunks of the LSD inside the diff

Bmurray350z

iTrader: (34)

Pic?

JustinZ33

guitman32

iTrader: (15)

Was the coast side of the gears beveled like that before you installed? Cause it looks like its been chewed up by the pinion.

None of these pics conclusively show that its the actual differential that failed, just a chewed up ring gear, metal shavings, and the flange in the diff is seriously chewed up. Did the driveshaft fail? Or is that mark from you prying it off? edit i mean the mark on the little flange/ring that is loose but is normally supposed to be pressed up against the tone ring


Thanks for the pics, still looks like install error to me.

guitman32

iTrader: (15)

Do you plan on opening the differential itself?

Conway_160

iTrader: (1)

Just a flesh wound, put some duct tape one it and call it good.