Posi unit checking

[jpratt]

If I jack the rear of my G80 equipped car. Leave it in park and spin one tire, what will the other one do?

 

[jdpolzin]

It will turn the same way!

 

[jpratt]

In PARK the driveshaft will not turn therefore both wheels cannot turn forward.

 

[turbojd]

It will turn the same way!

In neutral

 

[jpratt]

In neutral

What about in park?

 

[charlief1]

Nothing should turn if it's in park.

 

[jpratt]

Nothing should turn if it's in park.

Well crap. WIth a little effort I can spin one wheel and the other spins opposite. But when I try to I can leave parallel black marks very easy.

Would you say my posi is starting to go out or not worry about it? I only drive is a 1,000-2,000 miles a year and changed the fluid in the rear about 3 years ago and did use GM posi fluid then.

 

[jdpolzin]

For a second there, I thought this was a trick question.

 

[DailyDrifter]

In park you might be able to spin one tire but your going to have to spin it pretty hard. If you dont have the right fluid in it, it could cause the clutches to slip easier. Your clutches could also be shot though too.