The wierdest thing just happened.

I was pulling in the local Mickey D's (45 degree angle so that the R1 lip wouldn't scrape) when pedestrian was just walking across the parking lot so I stop. No biggie. As he passes by I start letting the clutch out, I get past the point where something *should* be happening and nothing does, the car does not move.

I push the clutch and double check that I have it in 1st gear (1st-neutral-1st move). I try again and again the car doesn't move, it is silent, then I hear a slight noise from the right rear, the tire is not touching the ground. I wiggled the steering wheel, the car rolls back a foot or two and then I have no problem moving forward.

Never had this happen before but I've never stopped in a place where the wheels are articulated much.

 

I knew it would happed sooner or later,..you've created a Monster.
I guess the Chassis is stiffer than we think.

 

One of your tires must have been off the ground since you were going up at an angle and when you tried to start moving your diff must have been spinning the tire that was off the ground...

I think..

 

Just the other day I saw a 911 do this going into a gas station. Looked pretty cool

 

I think he already arrived at that conclusion. Maybe time to check your rear suspension system/components.

 

The differential should still move the car with one tire on the ground. How many miles on the rear end?

If the car is driving ok, and you don't care too much about a worn rear end, just leave it alone for a while. I doubt it will hurt anything.

 

give this guy the super genius of the year award

 

The Torsen still needs to see some load at both axles in order to work. The Torsen is incapable of a 100% torque split (as are the vast majority of other diff designs...)

 

Adam C

Doesn't the Torsen diff require some minimal load on the spinning wheel to cause the diff to transfer torque to the more slowly moving wheel? With his one wheel in the air this load isn't there.

 

I don't think so. The torsen is a load based diff. If there is no load on one tire then I think it'll just spin. Usually, even in slippery conditions there is some load on one wheel.

I never have any problems auto-xing the car. Both tires spin off the line and I never spin the inside tire coming out of a corner.

If I had a clutch pack diff like a TII then I think it would have moved it with one wheel off the ground.

The car just turned 67,500 miles in the drive through, seriously.

Jeff

 

Great minds think alike!

 

I'am going to have to try this. Hehe.

 

I've seen cars with REALLY stiff suspension pick up rear outside tires autocrossing, especially Rabbits and the like. I know with most coilovers the suspension doesn't "sag" that much with the car in the air - the wheels are almost in the same place in the air as they would be on the ground.

Not really a problem I would think per se, but just a curiosity . Go to Burger King instead of McDonald's and you'll be OK .

Might be interesting to put one tire in a no-traction situation (ice, dirt, etc.) and the other on pavement and see what happens.

Dale

 

Yea, my FC has done that a few times. To me, it reinforces the fact that my chassis is very rigid and the suspension is very stiff - then I go for a drive and my internal organs get the same idea.

 

this comes from really stiff suspention, if u think about it, a stiff suspention has little travel, meaning when u went of there bump it angled ur car so that the wheel picked up off the ground, if u ever noticed when u jack up a stock car it takes awhile before the tires lifts off the ground but.,

When u jack up a lowered car after a couple pumps ur tire comes off the ground, depending where u jack it.. somewhere on the side its EZ to get both up at 1 time.


just stiff suspention

 

My mistake. I didn't realize it needed "some" resistance.

 

Yeah, this car has some fun stiffness, huh? I remember I had the front on jackstands, and was lifting the rear at the scisors jack point, and my G/F started laughing, saying the car was levitating. Sure enough, the other side was going up nicely as well. I was even able to bounce the chassis a little. Sure as HELL couldn't do that with my '74 Duster way back when. Spaggetti body fer sure

 

I think you may want to rethink this for a moment.

 

my FD and my g/f's prelude do it pulling into my driveway. my crx used to do it too. just about any car with suspension work or good suspension will do it given the right angle

 

VWs pick up their INSIDE rears a lot, but I've never seen one pick up an outside tire.

-Max

 

yep this happens to me all the time pulling into my garage. Another cool thing about suspension work is that when trying to jack my car up in my garage i have to get it up with the scissor on the left front to slide that jack under, while raising the car on that side the left rear lifts off the ground

 

what kind of chassie mods do you have? have you seam welded your fd? caged? floor bars?

 

all i have is racing beat sway bars, a greddy front strut bar, and ground control coilovers with tokico shocks. I was very surprised with that happening but it does it all the time

 

I hope I'm playing the fool by posting something obvious that no one thought it was necessary to say, but...

With a rear wheel in the air, you can engage the limited slip by lightly applying the brakes.

 

Lube your swaybar mounts?

-s-