HELP!!!Dam one wheel wonder!!!!

Z28EATR · 05-21-2001, 07:32 PM

I am having a problem with the Auburn posi unit in my 8.8 rear end. If i did a heal-toe (still) burnout one wheel would break loose and one would spin. But if i just did a regular (put it to the wood) burnout with no brakes it would pull posi. Any ideas why this could be occurring. Oh yea i think its the clutches in the posi unit cause when i changed the gear fluid it was blacker than charcoal. Thanks for the help.

------------------
88 LX 5.0 Ragtop
"Desire"
14.29 @ 96.45 mph
Mod Specs

jimberg · 05-21-2001, 08:01 PM

Hmm, when I run my car into a brick wall, the front end gets a little distorted.

You're holding your foot on the brake and therefore locking up one wheel. It's a sign that your rear brakes are actually working to a degree. A limited slip differential will start working like a regular one at a certain point. I wouldn't worry about it.

I would stop doing those type of burnouts, though. You ARE burning out your clutches doing them.

------------------
351W 89 Mustang GT Convertible

Z28EATR · 05-21-2001, 09:18 PM

first off im not an idiot the last rear end i had didnt have that problem and since the brake pressure resides mostly in the front brakes anyways (about a 60 to 40 ratio) it really shouldnt screw with the clutches in the rear end. Anybody else??

jimberg · 05-21-2001, 09:28 PM

The grinny face was to imply tongue in cheek humor. I was just ribbing you a little, not calling you an idiot.

If both wheels are spinning with the brake applied, then no, you're not burning up your clutch plates in the differential. It's when you are doing the one wheel burnout. If both wheels spin on a regular acceleration burnout, I wouldn't worry about it. That means your differential is working.

Here's the scenario as to why it was working like you wanted it to before and why it isn't now. To install the differential, you probably had to loosen the drums some to get them off. In the process of putting them back on, they had to be tightened back up. This readjusted your rear brakes so they would work the way they are supposed to. They're called limited slip differentials, not no-slip differentials. If they didn't slip, you wouldn't be able to turn.

------------------
351W 89 Mustang GT Convertible

Z28EATR · 05-21-2001, 09:43 PM

ya i know what you mean now, its funny when i swapped the rear ends i had to use the old brake lines from the rear end i took out cause the lines on the rear going in where scrapped. I got everything back in and ill be damned if i didnt brake off a bleeder plug!! AAAAAAAAHHHHHHHHHH!!! had to pull one of the brake cylinders off my rear for the new one, holy crap i wonder if the other brake cylinder might be siezed, the wheel that spins is the side i didnt replace!!!! dude your a life saver. thanks!!!!

------------------
88 LX 5.0 Ragtop
"Desire"
14.29 @ 96.45 mph
Mod Specs

NO SLO PK · 05-22-2001, 09:47 AM

Ummm, I've been told the Auburn units are not rebuildable. Don't know if this is true, but I have heard this from a couple of sources.

------------------
Russ L
'91 LX
Procharger, 3 row intercooler, extrude honed Cobra intake, Mac full Length Headers, 30# inj., 73mm C&L, 75mm tb, E303 cam, 289 rods, ported E7 heads, MSD, T-Rex w/255 lph Walbro, 5 lug conversion, Cobra R wheels, 3.27 gears and Moser Axles.

90dpscoupe · 05-22-2001, 01:38 PM

Same thing happens to me, sometimes i get a one legger, but when i just punch it on some concrete, like on the post office lot

, i see two marks same length, i thingk holding the brake just isnt good. Hey zeatr, we have some pretty close times, my best is 13.9, but i will be a SOB if i can run that again, im usually in the 14.0-2 range at 96-97 mph, timing is backed off a little, cant afford premium all the time.

------------------
90 lx coupe: Mac cold air fenderwell, accel supercoil,ADS chip (not yet track tested),3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607

next mods: subframes, mac h-pipe

Z28EATR · 05-22-2001, 05:44 PM

Well i changed the gear fluid and threw in some friction modifier and it seems to be getting better as the fluid wears in. I havent tried a standing burnout yet but like i said it could be do to uneven brake pressure in the rear due to a possible seized brake cylinder.

------------------
88 LX 5.0 Ragtop
"Desire"
14.29 @ 96.45 mph
Best 60ft 2.19 YUK!!!!
Best Mph 98.9

90dpscoupe · 05-22-2001, 10:47 PM

How u guys change rear differential fluid? there isnt any drain, do you just use a syphon?

------------------
90 lx coupe: Mac cold air fenderwell, accel supercoil,ADS chip (not yet track tested),3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows.
Best time: 13.9116(on 225/60/15 firehawks)
Best mph: 98.17
Best 60': 1.9607

next mods: subframes, mac h-pipe

fordgasm · 05-23-2001, 12:28 PM

Quote:

Originally posted by 90dpscoupe:
How u guys change rear differential fluid? there isnt any drain, do you just use a syphon?

Pull the rear cover and let it drain. You could get a new cover that has a drain already in it and has bearing cap supports for better strength. Or, after removing stock cover put a drain in it before reinstalling for future draining.

------------------
fordgasm
CLICK HERE to see my 87 GT

LX XLR8R · 05-23-2001, 03:32 PM

that sucks my 7.5 rear out of a 90 4 banger lights both em up..

when i was considering getting an Auburn, Bill Divine told me that you had to beat on it..the more you dumped..the better it worked..if you tried to walk it out then it wouldnt work as well

------------------
1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
AIM=onesillynotch

Z28EATR · 05-23-2001, 05:21 PM

thank kind of seems true, i noticed if i do a straight 3500 dump it blows both the tires.

------------------
88 LX 5.0 Ragtop
"Desire"
14.29 @ 96.45 mph
Best 60ft 2.19 YUK!!!!
Best Mph 98.9

Chris_H · 05-24-2001, 02:36 AM

I seem to be in the same boat here. When I engage my line-lock, and hold it for a few seconds, when I left off I am leaving one huge black line. But if I rev it and just dump the clutch, then I leave 2. Will this have any affect on both tires heating up evenly when I get a set of drag radials? I don't know whys its just spining the one with the line-lock.

Chris

------------------
1987 LX, rebuilt 306, Mac shorty headers 1 5/8, 2 1/2" Mac off road h-pipe, 2 1/2" 2 Chamber Flowmasters cat-back, Mac underdrive pullies, 65mm Throttle Body/Spacer, 3.55, K&N, Tremec 3550, King Cobra Clutch, Steeda Tri-Ax, Autometer gauges, White face gauges, blue silicone radiator hoses, Steeda Clutch Adjuster Kit.
Best times:
2.331 60ft, 9.966 @ 71.069 1/8 mile, 15.491 @ 91.846 1/4 mile at 4000 ft. elevation on street tires

05-21-2001, 07:32 PM	#1
Z28EATR Registered Member Join Date: Jun 2000 Location: Florence, KY,USA Posts: 210	HELP!!!Dam one wheel wonder!!!! I am having a problem with the Auburn posi unit in my 8.8 rear end. If i did a heal-toe (still) burnout one wheel would break loose and one would spin. But if i just did a regular (put it to the wood) burnout with no brakes it would pull posi. Any ideas why this could be occurring. Oh yea i think its the clutches in the posi unit cause when i changed the gear fluid it was blacker than charcoal. Thanks for the help. ------------------ 88 LX 5.0 Ragtop "Desire" 14.29 @ 96.45 mph Mod Specs

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05-21-2001, 08:01 PM	#2
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	Hmm, when I run my car into a brick wall, the front end gets a little distorted. You're holding your foot on the brake and therefore locking up one wheel. It's a sign that your rear brakes are actually working to a degree. A limited slip differential will start working like a regular one at a certain point. I wouldn't worry about it. I would stop doing those type of burnouts, though. You ARE burning out your clutches doing them. ------------------ 351W 89 Mustang GT Convertible

05-21-2001, 09:18 PM	#3
Z28EATR Registered Member Join Date: Jun 2000 Location: Florence, KY,USA Posts: 210	first off im not an idiot the last rear end i had didnt have that problem and since the brake pressure resides mostly in the front brakes anyways (about a 60 to 40 ratio) it really shouldnt screw with the clutches in the rear end. Anybody else??

05-21-2001, 09:28 PM	#4
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	The grinny face was to imply tongue in cheek humor. I was just ribbing you a little, not calling you an idiot. If both wheels are spinning with the brake applied, then no, you're not burning up your clutch plates in the differential. It's when you are doing the one wheel burnout. If both wheels spin on a regular acceleration burnout, I wouldn't worry about it. That means your differential is working. Here's the scenario as to why it was working like you wanted it to before and why it isn't now. To install the differential, you probably had to loosen the drums some to get them off. In the process of putting them back on, they had to be tightened back up. This readjusted your rear brakes so they would work the way they are supposed to. They're called limited slip differentials, not no-slip differentials. If they didn't slip, you wouldn't be able to turn. ------------------ 351W 89 Mustang GT Convertible

05-21-2001, 09:43 PM	#5
Z28EATR Registered Member Join Date: Jun 2000 Location: Florence, KY,USA Posts: 210	ya i know what you mean now, its funny when i swapped the rear ends i had to use the old brake lines from the rear end i took out cause the lines on the rear going in where scrapped. I got everything back in and ill be damned if i didnt brake off a bleeder plug!! AAAAAAAAHHHHHHHHHH!!! had to pull one of the brake cylinders off my rear for the new one, holy crap i wonder if the other brake cylinder might be siezed, the wheel that spins is the side i didnt replace!!!! dude your a life saver. thanks!!!! ------------------ 88 LX 5.0 Ragtop "Desire" 14.29 @ 96.45 mph Mod Specs

05-22-2001, 09:47 AM	#6
NO SLO PK Registered Member Join Date: Mar 1999 Location: Arcadia, CA, USA Posts: 731	Ummm, I've been told the Auburn units are not rebuildable. Don't know if this is true, but I have heard this from a couple of sources. ------------------ Russ L '91 LX Procharger, 3 row intercooler, extrude honed Cobra intake, Mac full Length Headers, 30# inj., 73mm C&L, 75mm tb, E303 cam, 289 rods, ported E7 heads, MSD, T-Rex w/255 lph Walbro, 5 lug conversion, Cobra R wheels, 3.27 gears and Moser Axles.

05-22-2001, 01:38 PM	#7
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	Same thing happens to me, sometimes i get a one legger, but when i just punch it on some concrete, like on the post office lot , i see two marks same length, i thingk holding the brake just isnt good. Hey zeatr, we have some pretty close times, my best is 13.9, but i will be a SOB if i can run that again, im usually in the 14.0-2 range at 96-97 mph, timing is backed off a little, cant afford premium all the time. ------------------ 90 lx coupe: Mac cold air fenderwell, accel supercoil,ADS chip (not yet track tested),3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows. Best time: 13.9116(on 225/60/15 firehawks) Best mph: 98.17 Best 60': 1.9607 next mods: subframes, mac h-pipe

05-22-2001, 05:44 PM	#8
Z28EATR Registered Member Join Date: Jun 2000 Location: Florence, KY,USA Posts: 210	Well i changed the gear fluid and threw in some friction modifier and it seems to be getting better as the fluid wears in. I havent tried a standing burnout yet but like i said it could be do to uneven brake pressure in the rear due to a possible seized brake cylinder. ------------------ 88 LX 5.0 Ragtop "Desire" 14.29 @ 96.45 mph Best 60ft 2.19 YUK!!!! Best Mph 98.9

05-22-2001, 10:47 PM	#9
90dpscoupe Registered Member Join Date: Jun 2000 Location: sanantonio, Tx, usa Posts: 1,407	How u guys change rear differential fluid? there isnt any drain, do you just use a syphon? ------------------ 90 lx coupe: Mac cold air fenderwell, accel supercoil,ADS chip (not yet track tested),3-core radiatr, FMS alum D/S, Black magic fan, 3.27grs, 3chbr flows. Best time: 13.9116(on 225/60/15 firehawks) Best mph: 98.17 Best 60': 1.9607 next mods: subframes, mac h-pipe

05-23-2001, 03:32 PM	#11
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	that sucks my 7.5 rear out of a 90 4 banger lights both em up.. when i was considering getting an Auburn, Bill Divine told me that you had to beat on it..the more you dumped..the better it worked..if you tried to walk it out then it wouldnt work as well ------------------ 1987 black notch(ex 4 banger) DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one.. AIM=onesillynotch

05-23-2001, 05:21 PM	#12
Z28EATR Registered Member Join Date: Jun 2000 Location: Florence, KY,USA Posts: 210	thank kind of seems true, i noticed if i do a straight 3500 dump it blows both the tires. ------------------ 88 LX 5.0 Ragtop "Desire" 14.29 @ 96.45 mph Best 60ft 2.19 YUK!!!! Best Mph 98.9

05-24-2001, 02:36 AM	#13
Chris_H Registered Member Join Date: Oct 1999 Location: New Mexico Posts: 488	I seem to be in the same boat here. When I engage my line-lock, and hold it for a few seconds, when I left off I am leaving one huge black line. But if I rev it and just dump the clutch, then I leave 2. Will this have any affect on both tires heating up evenly when I get a set of drag radials? I don't know whys its just spining the one with the line-lock. Chris ------------------ 1987 LX, rebuilt 306, Mac shorty headers 1 5/8, 2 1/2" Mac off road h-pipe, 2 1/2" 2 Chamber Flowmasters cat-back, Mac underdrive pullies, 65mm Throttle Body/Spacer, 3.55, K&N, Tremec 3550, King Cobra Clutch, Steeda Tri-Ax, Autometer gauges, White face gauges, blue silicone radiator hoses, Steeda Clutch Adjuster Kit. Best times: 2.331 60ft, 9.966 @ 71.069 1/8 mile, 15.491 @ 91.846 1/4 mile at 4000 ft. elevation on street tires