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08-29-2010, 07:53 PM
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CC Member
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Join Date: May 2004
Posts: 173
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Not Ranked
need some ERA rear info , snapped an axle again ...my fault again
I personally would upgrade the jag axles if I was ordering a new replica . I need to change the "stub axle " after going threw two sets . ( not from normal driving) .First time, from not knowing the limits of things (11 years ago) . Second time , from fatigue after too many hard launches , twisting them over time until they snap .
I do a search
Last edited by John Martin; 10-22-2010 at 07:30 PM..
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08-29-2010, 08:09 PM
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CC Member
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Join Date: Mar 2006
Location: San Marcos california,
CA
Cobra Make, Engine: 1989 KCC from South Africa Right Hand Drive
Posts: 1,605
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Not Ranked
Those Jag rears are not the strongest for drag racing, they are however great for the occasional drag strip day,and spirited track and road use.
Some had Salisbury and some had Dana internals, the easiest way to spot the difference is the front driveshaft input flange which is round on the Salisbury and rectangular on the Dana. Salisbury has clutch plates and the Dana a cone clutch.. I prefer the Salisbury but others prefer the Dana..??   |
08-29-2010, 08:36 PM
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CC Member
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Join Date: May 2002
Location: Ashburton, New Zealand,
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Cobra Make, Engine: UK Ram SC. KC-Yates 373, Jerico 5 speed.
Posts: 1,240
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Not Ranked
Rear end
I have used both the cone type and had poor results in road racing, good for one or two meetings and thats it, the LSD plate type has a lot more wear area and nowadays with my 8.8" it has an Eaton posi LSD with carbon fibre plates, having tried this one yet but I am assuming they last longer than old LSD plate types of the 60's 70's!
Also used Detroit Lockers for road racing in a not very forgiving sports sedan, I think the locker action made the handling worse!
__________________
A J. Newton
The 1960's rocked!
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08-30-2010, 07:19 AM
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CC Member
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Join Date: May 2004
Posts: 173
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Not Ranked
Its a Dana 44 , It has 5 bolts holding the stub axles to the case .
Last edited by John Martin; 10-22-2010 at 07:32 PM..
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08-30-2010, 08:46 AM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: ERA 427 SO
Posts: 1,126
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Not Ranked
Your's sounds like an open Jag differential. I replaced my open Jag center section with an Auburn LSD from CWI
http://www.cwiinc.com/
and have had good results. I've had no problems with the stub shafts, but they should be able to provide the HD stubs if they're available...and the 3.31:1 ring and pinion.
__________________
Ken
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08-30-2010, 07:00 PM
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CC Member
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Join Date: May 2004
Posts: 173
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Not Ranked
Took it apart today , The center is a Presicion Gear Power lok LSD ,
Last edited by John Martin; 10-22-2010 at 07:31 PM..
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08-31-2010, 03:48 PM
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CC Member
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Join Date: May 2004
Posts: 173
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Not Ranked
Does any one know if a " Power lok " is rebuildable ?
Last edited by John Martin; 10-07-2010 at 02:23 PM..
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08-31-2010, 05:59 PM
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CC Member
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Join Date: Mar 2001
Location: E BRUNSWICK N.J. USA,
Posts: 3,841
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Not Ranked
John What is going on with the rearend of the car?
John Martin John the salibury and dana 44 are the same case. The ring gear and pinions are the different. How are you snapping rear shafts??? It sounds like you are doing 5,000 rpm clutch drops and power shifting the car?? We have guys on this forum with 700+HP motors, cars that will run in the low tens to high nines and are not breaking rear ends. Stacy P from texas ran a 9.85 at 138 at Gateway some years back with a 307 and stock axles. Motor makes 550hp and a 250 shot on NOS. You need to either buy a car with a solid rearend or add a 4 link to what you have.
As far as going to a 30 spline axle, Mark williams or CWI has them. CWI want to build the whole center section for the rear.
This is what I did, Got a Jag center housing with 3.31 gears. Installed a detroit locker with a 30 spline stub shafts. Gone to a tight back lash of .004" This is under the min for back lash but stops breaking of gears with 3,000 rpm hole shots. 4wheel drive shops sell dana 44 carriers. Some even have a life time warrantty. Get a 30 spline carrier and an LPW rear cover for the diff case. You may have to modify the carrier holes for the ring gear. This will support the caps in the rearend and stablizer it from rocking. This should be good for about 600HP. If you can't this to stop, recomend you buy a Franklin quick change rearend that the dirt tracks use. 500+ ratios a 9" ring and pinion setup. It will fit in the rear end cradle, but you will have to modify the gastank for clearance.
The other idea is to buy a Soft-loc clutch from Mcleod and have it setup to stop the breakage. Do you any pictures of the rearends breaking?? Get the Mark williams stub shafts, they are good for 800-900HP. Rick L.
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08-31-2010, 07:06 PM
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CC Member
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Join Date: May 2004
Posts: 173
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Not Ranked
I 'am in contact with Strange Engineering
Last edited by John Martin; 09-02-2010 at 09:05 PM..
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08-31-2010, 10:42 PM
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Senior Club Cobra Member
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Join Date: Nov 1999
Location: Folsom,
CA
Cobra Make, Engine: ERA 623, 427 S/C Cobra. Ford FE 428 Cobra Jet, Ford Nascar TL 4speed - with a touch of raw; "less is more" theme
Posts: 3,886
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Not Ranked
Hi John,
Got your note as I was typing this.., before I designed the wheel hop kit, I searched around at a few 4x4 places and found a set of inner hardened chromoly stub axles and hardened spider gears. With a one mild launch (only once) my Dana 44 crumbled into 44 small pieces. I found my photo but can't find my notes on the source, but there were only a few sets left and it was quite a while ago. They look like this, for reference. May need to search around. I think a few guys will make up a few sets from time to time. Maybe someone here has a new source.
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Duane
Western States Cobra Group 1998-2016.
Last edited by decooney; 08-31-2010 at 10:45 PM..
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09-01-2010, 04:17 AM
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CC Member
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Join Date: May 2004
Posts: 173
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The picture you posted is a big help .
Last edited by John Martin; 09-02-2010 at 09:06 PM..
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09-02-2010, 03:17 AM
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CC Member
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Join Date: May 2004
Posts: 173
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Not Ranked
Strange said they would make them ,
Last edited by John Martin; 09-02-2010 at 09:09 PM..
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09-02-2010, 03:40 AM
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CC Member
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Join Date: May 2004
Posts: 173
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Not Ranked
My Power lok works , can't upgrade parts inside .
Last edited by John Martin; 10-07-2010 at 02:24 PM..
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09-03-2010, 01:20 PM
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CC Member
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Join Date: May 2004
Posts: 173
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Not Ranked
I'm ordering MarkWilliams 30 spline axles , auburn LSD ,Centerforce dual friction kit w/pp,tob . I should be all set .
Last edited by John Martin; 09-16-2010 at 02:53 AM..
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