Pulling in at an angle, rear wheel comes off the ground
#1
Pulling in at an angle, rear wheel comes off the ground
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 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.
#5
il Cosa Nostra e vivo!!
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Originally Posted by KaiFD3S
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..
I think..
#7
built my own engine
Originally Posted by KaiFD3S
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..
I think..
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#8
Lives on the Forum
Originally Posted by adam c
The differential should still move the car with one tire on the ground.
#9
Racecar - Formula 2000
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.
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.
#10
Originally Posted by adam c
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.
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.
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
#11
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Originally Posted by DamonB
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...)
Originally Posted by DaveW
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.
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.
#13
RX-7 Bad Ass
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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
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
#14
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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.
#15
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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
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
#16
Cheap Bastard
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Originally Posted by turbojeff
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.
My mistake. I didn't realize it needed "some" resistance.
#17
don't race, don't need to
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
#19
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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
#21
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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
#23
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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
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