When i was moving my 1985 Z-28, 5-spd, 305 4bbl a few mins ago... I noticed that when I peeled out on the wet-grass, both my tires spun... first the left, and then in a delayed reaction, the right. and both marks were pretty darn deep... so heres the question...
I thought my car came with a 3:23 open-rear-end... then why are both tires spinnin?

 

ok... no help?

 

jack up the diff and spin 1 wheel and see if both turn, if they do its posi.

 

ok.. thanx

but i thought that only a 3:23 open diff. was available for my car?

 

In low traction conditions both tires can spin with an open diff. Easy to check to see if it is a posi; someone might have swapped one in.

 

Oh... but even on pavement i think both of them spun!

 

my open rear will spin em both on pavement too...provided i start rollin a little bit before hittin it. can you spin em both for a long long time? tomorrow just jack her up and check thats the only real way. peace

 

as said before, in a completely tractionless situation, both tires should spin. The fact that they kept on spinning once you hit pavement doesn't mean much, they were both already spinning, and they kept going.

Since you say one lit up, then the other, i'd guess that's it's most definately open. Jack it up and check for sure though.

Eric

 

Well... i dunno how long i could have lept going... dint want to waste toooo much rubber(lol)... and thanx for the advice... illl try jckin her up tomorow!(a lil late now!) So later everybody!

 

If you still have your RPO codes under the console lid, see if G80
is listed. That is the option code for the Limited Slip (aka Posi).

 

Ok... i will check for that code as soon as i find the old damned console... i recently replaced it due to being all cracked. I will have to look upstairs, or somwere... but thanx for the code!

 

I think its open... I seem to have the exact same car as you and I can light both tires up in 3rd gear if I rev it high enough and I have a new clutch

 

lol