is my posi working???
Thread Starter
Racer
Joined: Jul 2003
Posts: 401
Likes: 0
From: texas,, at last
is my posi working???
when i have both wheels off the ground and turn one by hand the other goes in the same direction,,,
but,,,,,
if i jack one off the ground, put it in drive the one in the air turns but the other doesn't push the car forward,,,,
is this the way it should work???????
neil
[Modified by camaroneil, 7:30 PM 11/23/2003]
but,,,,,
if i jack one off the ground, put it in drive the one in the air turns but the other doesn't push the car forward,,,,
is this the way it should work???????
neil
[Modified by camaroneil, 7:30 PM 11/23/2003]
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Re: is my posi working??? (camaroneil)
:yesnod: Clutch pack could be slipping. The driveline shop that did my ring and pinion swap said the clutch pack springs were soo shot that my clutches had really no wear. So they just replaced the springs and reused the clutches. Could be yours grabs enough while off ground and unloaded to turn. But slips when on ground and encounters resistance. Just my 2 cents here. :D
Advanced
Joined: Nov 2003
Posts: 89
Likes: 0
From: Long Island NY
Re: is my posi working??? (camaroneil)
1st I have to say you must be a idiot. You never block one wheel and start the engine to see if the other wheel will turn. Let's say it did not then what moron.
If you want to test the posi. take it to a pro or do what the rest of us do " at the lights nail the gas and you should lay to black patches on the pavement. Nice and safe. Oops I forgot you are a moron ( Don't do what I said near a school yard)
If you want to test the posi. take it to a pro or do what the rest of us do " at the lights nail the gas and you should lay to black patches on the pavement. Nice and safe. Oops I forgot you are a moron ( Don't do what I said near a school yard)
Thread Starter
Racer
Joined: Jul 2003
Posts: 401
Likes: 0
From: texas,, at last
Re: is my posi working??? (Bad-79)
get a life bad-79 !!!!!!!!!!!!!!!!!!!
i asked if there was something wrong with my posi,,,not what you thought was right or wrong,,,as for your opinion on that i don't give a damn,
at least cardo knew what i was on about and gave me some good advice,
pity you didn't do the same instead of making yourself look like an idiot/moron,
being in the UK i don't have the luxury of a PRO who can tell me whats wrong and i need to do my tests my way, the only way i can,
if you can't give helpful advice to people on this forum then go elsewhere,
neil
i asked if there was something wrong with my posi,,,not what you thought was right or wrong,,,as for your opinion on that i don't give a damn,
at least cardo knew what i was on about and gave me some good advice,
pity you didn't do the same instead of making yourself look like an idiot/moron,
being in the UK i don't have the luxury of a PRO who can tell me whats wrong and i need to do my tests my way, the only way i can,
if you can't give helpful advice to people on this forum then go elsewhere,
neil
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Re: is my posi working??? (camaroneil)
That is not the way to check a posi but your not an idiot either. That is uncalled for. The proper way is to put a torque wrench on one wheel while locking the other wheel and to see what torque it takes to have the posi clutches "slip". I don't have the torque rating for this but maybe someone else will let you know.
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Re: is my posi working??? (Bad-79)
WoW!!! I thought I was the only one who ever tried on purpose to get his percentage LOWERED!!! :eek: :eek: :eek: :eek: :eek: :eek:
First off the guy NEVER said he started the car AT ALL in his post. Hmmm...can this be one of those ASSUME things? :nonod:
Secondly, we DON'T call folks on the forum nasty names. It's bad form and the mods DON'T like it at all. It's a quick way to lose posting priveledges. Even dumb ol' Dep never does anything that bad.
Third, "pros" do NOT test their posi by laying down two strips from stoplights.
It's an unsafe practice at the least and it does NOT give you an accurate indication if posi is working or not. There's nothing "nice and safe" about doing that on public thoroughfares.
Take a hint from a guy that HAS been banned...use some smarts when you post on here.
Dep
[Modified by Dep, 2:20 PM 11/23/2003]
First off the guy NEVER said he started the car AT ALL in his post. Hmmm...can this be one of those ASSUME things? :nonod:
Secondly, we DON'T call folks on the forum nasty names. It's bad form and the mods DON'T like it at all. It's a quick way to lose posting priveledges. Even dumb ol' Dep never does anything that bad.
Third, "pros" do NOT test their posi by laying down two strips from stoplights.
It's an unsafe practice at the least and it does NOT give you an accurate indication if posi is working or not. There's nothing "nice and safe" about doing that on public thoroughfares.
Take a hint from a guy that HAS been banned...use some smarts when you post on here.
Dep
[Modified by Dep, 2:20 PM 11/23/2003]
Racer
Joined: Apr 2003
Posts: 486
Likes: 0
From: Point Pleasant NJ
Re: is my posi working??? (Dep)
Man and I thought I hated Dep the most on the forum! :jester
Alright alright I think we should all chill about the idiot thing. I would suggest editting your post before everyone else gets all flamed up. Sorry I dont have any help for the posi testing but am very interested in other peoples answers. I thought the point to a posi is that it doesnt slip? Maybe I'm the idiot though... :reddevil
Alright alright I think we should all chill about the idiot thing. I would suggest editting your post before everyone else gets all flamed up. Sorry I dont have any help for the posi testing but am very interested in other peoples answers. I thought the point to a posi is that it doesnt slip? Maybe I'm the idiot though... :reddevil
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Re: is my posi working??? (Spook)
Awwww....you don't really hate me do ya? :sad: :sad: :sad:
Posi has built in "slip" even when brand new. It limits the amount of slippage based on how fast one wheel is spinning on one side or the other. That's why it's sometimes called LSD. No...NOT the drug...Limited Slip Differential. It limits the slip as much as practical. TRUE posi would be a spool in the rear end that joins both axles together. That is SUPER strong, but makes turning a corner pretty weird. I don't even think they make a spool for Vette rear end though.
I'm no expert on this stuff..I just have a rough working knowledge of it. If others have better input please feel free to correct me.
Dep
[Modified by Dep, 3:25 PM 11/23/2003]
Posi has built in "slip" even when brand new. It limits the amount of slippage based on how fast one wheel is spinning on one side or the other. That's why it's sometimes called LSD. No...NOT the drug...Limited Slip Differential. It limits the slip as much as practical. TRUE posi would be a spool in the rear end that joins both axles together. That is SUPER strong, but makes turning a corner pretty weird. I don't even think they make a spool for Vette rear end though.
I'm no expert on this stuff..I just have a rough working knowledge of it. If others have better input please feel free to correct me.
Dep
[Modified by Dep, 3:25 PM 11/23/2003]
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Drifting
Joined: Feb 2002
Posts: 1,906
Likes: 0
From: Berlin
Re: is my posi working??? (camaroneil)
Even a posi has to slip a little to work right. My understanding is that the clutches don't engage significantly until there's a fairly large speed difference between the two wheels.
Racer
Joined: Apr 2003
Posts: 486
Likes: 0
From: Point Pleasant NJ
Re: is my posi working??? (Dep)
Awwww....you don't really hate me do ya? :sad: :sad: :sad:
Le Mans Master
Joined: Oct 2002
Posts: 5,714
Likes: 6
From: Silver City NM
St. Jude Donor '05-'07
Re: is my posi working??? (camaroneil)
thanks for the info guys,
will try and find the torque settings and try that,
thanks again,
neil
will try and find the torque settings and try that,
thanks again,
neil
Spook: there are other posi rear end units available for the Vette other than the factory one. If your posi ever does conk you can get a replacement that is heavier duty than what is in there for the same price. Auburn and Eaton are two posi makers that come to mind. The BEST posi stuff is avaiable for Ford 9 inch and Dana 60 rear ends. The NASCAR guys can't a use a posi like ours so they use something called a Detroit Locker. VERY heavy duty unit. But it won't fit our rear ends :(
Dep
[Modified by Dep, 3:31 PM 11/23/2003]
Racer
Joined: Sep 2003
Posts: 420
Likes: 1
From: Indianapolis IN
Re: is my posi working??? (Bad-79)
1st I have to say you must be a idiot. You never block one wheel and start the engine to see if the other wheel will turn. Let's say it did not then what moron.
If you want to test the posi. take it to a pro or do what the rest of us do " at the lights nail the gas and you should lay to black patches on the pavement. Nice and safe. Oops I forgot you are a moron ( Don't do what I said near a school yard)
If you want to test the posi. take it to a pro or do what the rest of us do " at the lights nail the gas and you should lay to black patches on the pavement. Nice and safe. Oops I forgot you are a moron ( Don't do what I said near a school yard)
Melting Slicks
Joined: Oct 2002
Posts: 2,106
Likes: 0
Re: is my posi working??? (blunsford)
I dont know what bad-79's problem is but the only word that seems to be in his vocabulary and that he seems to use in each of his posts seems to be "moron". If you dont know anything dont say anything, hint hint.
Team Owner
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Re: is my posi working??? (battsup)
hey folks, new to forum thing , real glad to see one bad apple don't ruin the
bunch........my mom&dad call me moron, but they can they built the machine
right!!!!
bunch........my mom&dad call me moron, but they can they built the machine
right!!!!
Instructor
Joined: Jan 2003
Posts: 222
Likes: 0
From: Ventura CA
Re: is my posi working??? (comp)
In the 4 wheel drive circles I run in, getting both tires to turn even when one's in the air is a must. If I understand correctly (probly dont), the kind of posi we have in the vettes is controlled by how much torque is going through the ring/pinion. When the car launches, there is a lot of torque and the clutches are forced together very hard making the rear end act essentially like it's spooled. But, when you're coasting through a turn there's no torque or very little on the rear end and it's easy for it to slip. Seems when I take off from a stop up hill in a turn, the inside tire almost always spins/chirps even with very little 'extraneous power' whereas on level ground in a turn where very little power is needed to move the car, it doesn't make a sound.
On the trails, we use everything from welded up spider gears (on the trail only rigs) to spools to power sensing lockers to air lockers. We dont use posi generally because when we need one tire to turn it's because there is ZERO traction on the other and posi with no torque doesn't do much.
There are lots of ways to make it go straight.
On the trails, we use everything from welded up spider gears (on the trail only rigs) to spools to power sensing lockers to air lockers. We dont use posi generally because when we need one tire to turn it's because there is ZERO traction on the other and posi with no torque doesn't do much.
There are lots of ways to make it go straight.
Safety Car
Joined: Jul 2002
Posts: 4,269
Likes: 3
From: St. Charles IL
Cruise-In 5-6-7-8-9-11-12 Veteran
A CI-6 Car Show Winner
Re: is my posi working??? (camaroneil)
From what I remember having gone through this with my 2500 Suburban (Got it stuck when it was almost new and only one wheel spinning). The factory told me there is about a 15 MPH difference between wheels before the flyweights will engage the clutch and drive both wheels, and even then there may be some slippage under heavy torque ("limited slip") I was kind of upset because I stuck that truck almost up to the axle. I thought they used to advertise these rear axles as "posi-traction" but then later called them "limited slip" because that's what they do. OT: lets all try to be friendly please? :grouphug:
Safety Car
Joined: Jul 2002
Posts: 4,269
Likes: 3
From: St. Charles IL
Cruise-In 5-6-7-8-9-11-12 Veteran
A CI-6 Car Show Winner
Re: is my posi working??? (camaroneil)
Kind of funny, but I talked to the mechanic that my business uses today about limited slip diagnostics. He suggested putting one rear side at a time up on a floor jack with wheels and see if the car will try to pull forward. The posi units use a positive lock up mechanism operated by fly weights. Once engaged they usually stay engaged until the car is stopped, placed in reverse, or one wheel turns faster then the drive. I guess the bottom line is you need to inspect your clutch pack and springs for problems. The limited slip additive is more for allowing the clutches to dis-engage smoothly then to aid with engagement. I just read in my GM service manual the torque specs to turn one wheel with the other on the ground is 70 foot pounds new, not less then 40 foot pounds used.
[Modified by Big Fish, 5:31 PM 11/24/2003]
[Modified by Big Fish, 6:35 PM 11/24/2003]
[Modified by Big Fish, 5:31 PM 11/24/2003]
[Modified by Big Fish, 6:35 PM 11/24/2003]
