Auburn Pro Series differential question. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

82Cecil · 02-25-2010, 10:22 PM

Originally I thought this was from setting up too long between run periods, but after a day at the track, I think my differential has quit being a "limited" slip.

With drag radials I getting a one tire fire in the burn out box (not in the water but on dry pavement). With the rear of the truck off the ground both tires rotate by hand in the same direction.

This is an 8.5 10 bolt differential. installed in 2007. Am I expecting too much?

On a track only vehicle, is a spool ok on pavement?

Thanks

hotrod 80 · 02-26-2010, 05:34 AM

Might make sure you don't have an axle seal or wheel cylinder leaking . Fluid on one side and not the other will cause this . Does the truck have a line lock or are you just footbraking it ? Also a good diff shop with have a torque wrench type set up to test the ft. lbs the diff is transfering . The drawback of a limited slip is that it will only tryand apply X amout of torque to the other tire if the grip is greater than that torque the clutches in the diff slip . Next time you are in the box a see this going on , stop and attempt the burnout again and see if both spin . the one that spun should be hot and sticky forcing the other or both to spin .

djracer · 02-26-2010, 09:30 AM

Quote:

Originally Posted by 82Cecil

On a track only vehicle, is a spool ok on pavement?

A spool is what most Drag Strip Only trucks and cars have. You can run on street with a mini spool or real spool but it will drag one tire when turning. To some folks this is a big deal but I have driven a few like this and it doesn't bother me.

cableguy0 · 02-26-2010, 11:28 AM

Which style auburn do you have? Clutch or Cone. If its clutch it can be rebuilt. If its a cone style the carrier is probably trash and you need another.

82Cecil · 02-26-2010, 06:49 PM

Thanks for the replys, foot braking, not totally sure but I think the Pro series is the cone style. The truck has become a trailered vehicle under development.

Is there is an advantage between a mini or full spool, a spool is not a spool when...? I mean there is a reason why both are made.
thanks for the education.

djracer · 02-26-2010, 06:58 PM

Typically you use a mini spool with stock axles(it goes in a stock non posi carrier) A full spool takes the place of the carrier and can be bought for higher spine axles.

82Cecil · 02-26-2010, 07:07 PM

A full spool in a 8.5 inch 10 bolt rear end, respectable idea or humorous?

Aiming at about 600 hp some day. ( sooner would be good ). thanks

Old Yeller 1970 · 02-27-2010, 09:25 PM

I have the regular Auburn limited slip and my tires either hook together or spin together every time. Sounds to me like your problem is in the unit.

wheatlandbrawler · 03-07-2010, 01:59 AM

spool with c clip eliminators since its a track only truck... takes so much headache out of "limited slip diffs" and its cheaper. you can litterally get a good mini spool for 30 dollars. and your axles will break before the mini spool will. the bad thing about a mini spool is that it dosnt "bite" as much of the axle as a full spool does. i recomend a spool though.

BossHogg69 · 03-09-2010, 04:59 PM

Quote:

Originally Posted by 82Cecil

A full spool in a 8.5 inch 10 bolt rear end, respectable idea or humorous?

Aiming at about 600 hp some day. ( sooner would be good ). thanks

you gonna run slicks/drag radials? 600hp is probably more than I would put in front of a 10bolt at the track with sticky tires.

82Cecil · 03-10-2010, 06:36 PM

Thanks for the advice

Spool is cheapest way out for now, but down the road, what rear end would be better suited instead of an 8.5 10 bolt?

With a spool is it a requirement to have C clip eliminators at any ET? (aint fast yet)

Thanks

**Captainfab** · 03-10-2010, 11:50 PM

With that kind of power I would go with either a Dana 60 or a 9 inch.
You cannot run C-clips with either a spool or a mini spool regardless of your ET. There is no way to get the C clips in there.

Quote:

Originally Posted by 82Cecil

Thanks for the advice

Spool is cheapest way out for now, but down the road, what rear end would be better suited instead of an 8.5 10 bolt?

With a spool is it a requirement to have C clip eliminators at any ET? (aint fast yet)

Thanks

will scratch · 05-04-2010, 11:04 PM

I'm wanting to run a mini spool with clip eliminators, what machine work is required with stock axels???????. Some advertisments for c clip eliinators are saying machine work required. Do you just weld on a bolt flange oris there somthing more to it?????. Thanks.
12 bolt 30 spline

02-25-2010, 10:22 PM	#1
82Cecil Registered User Join Date: Jan 2009 Location: Jacksonville FL Posts: 47	Auburn Pro Series differential question. Originally I thought this was from setting up too long between run periods, but after a day at the track, I think my differential has quit being a "limited" slip. With drag radials I getting a one tire fire in the burn out box (not in the water but on dry pavement). With the rear of the truck off the ground both tires rotate by hand in the same direction. This is an 8.5 10 bolt differential. installed in 2007. Am I expecting too much? On a track only vehicle, is a spool ok on pavement? Thanks Last edited by 82Cecil; 02-25-2010 at 10:30 PM. Reason: more info

02-26-2010, 05:34 AM	#2
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: Auburn Pro Series differential question. Might make sure you don't have an axle seal or wheel cylinder leaking . Fluid on one side and not the other will cause this . Does the truck have a line lock or are you just footbraking it ? Also a good diff shop with have a torque wrench type set up to test the ft. lbs the diff is transfering . The drawback of a limited slip is that it will only tryand apply X amout of torque to the other tire if the grip is greater than that torque the clutches in the diff slip . Next time you are in the box a see this going on , stop and attempt the burnout again and see if both spin . the one that spun should be hot and sticky forcing the other or both to spin . __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

02-26-2010, 11:28 AM	#4
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: Auburn Pro Series differential question. Which style auburn do you have? Clutch or Cone. If its clutch it can be rebuilt. If its a cone style the carrier is probably trash and you need another. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

02-26-2010, 06:49 PM	#5
82Cecil Registered User Join Date: Jan 2009 Location: Jacksonville FL Posts: 47	Re: Auburn Pro Series differential question. Thanks for the replys, foot braking, not totally sure but I think the Pro series is the cone style. The truck has become a trailered vehicle under development. Is there is an advantage between a mini or full spool, a spool is not a spool when...? I mean there is a reason why both are made. thanks for the education. Last edited by 82Cecil; 02-26-2010 at 06:51 PM.

02-26-2010, 06:58 PM	#6
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: Auburn Pro Series differential question. Typically you use a mini spool with stock axles(it goes in a stock non posi carrier) A full spool takes the place of the carrier and can be bought for higher spine axles. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

02-26-2010, 07:07 PM	#7
82Cecil Registered User Join Date: Jan 2009 Location: Jacksonville FL Posts: 47	Re: Auburn Pro Series differential question. A full spool in a 8.5 inch 10 bolt rear end, respectable idea or humorous? Aiming at about 600 hp some day. ( sooner would be good ). thanks Last edited by 82Cecil; 02-26-2010 at 07:30 PM.

02-27-2010, 09:25 PM	#8
Old Yeller 1970 DON'T TREAD ON ME Join Date: May 2005 Location: Crosby County, TX Posts: 989	Re: Auburn Pro Series differential question. I have the regular Auburn limited slip and my tires either hook together or spin together every time. Sounds to me like your problem is in the unit. __________________ Old Yeller

03-07-2010, 01:59 AM	#9
wheatlandbrawler Registered User Join Date: Apr 2007 Location: salina, kansas Posts: 123	Re: Auburn Pro Series differential question. spool with c clip eliminators since its a track only truck... takes so much headache out of "limited slip diffs" and its cheaper. you can litterally get a good mini spool for 30 dollars. and your axles will break before the mini spool will. the bad thing about a mini spool is that it dosnt "bite" as much of the axle as a full spool does. i recomend a spool though. __________________ 1968 swb RIP 408. 388 roller monster mouse, richmond 5 speed. and alot of the stuff that makes you happy. build link. http://67-72chevytrucks.com/vboard/s...d.php?t=389826

03-10-2010, 06:36 PM	#11
82Cecil Registered User Join Date: Jan 2009 Location: Jacksonville FL Posts: 47	Re: Auburn Pro Series differential question. Thanks for the advice Spool is cheapest way out for now, but down the road, what rear end would be better suited instead of an 8.5 10 bolt? With a spool is it a requirement to have C clip eliminators at any ET? (aint fast yet) Thanks

05-04-2010, 11:04 PM	#13
will scratch Registered User Join Date: Mar 2010 Location: wichita kansas Posts: 22	Re: Auburn Pro Series differential question. I'm wanting to run a mini spool with clip eliminators, what machine work is required with stock axels???????. Some advertisments for c clip eliinators are saying machine work required. Do you just weld on a bolt flange oris there somthing more to it?????. Thanks. 12 bolt 30 spline __________________ 79 2wd Blazer/ flip kit, drop spindles, drop springs. 355 c.i. sbc, 350 tranny

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