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#1 |
Mustang Maniac
Join Date: Sep 2000
Location: GA, U.S.A
Posts: 2,266
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![]() Is there somewhere that I can get an 8.8" traction lock rear with 3.73s that can handle 5-600 rwhp or do I have to just get the bigger, heavier 9" rear end?
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351W-powered 1979 Ford Mustang Ghia notchback '79 Video @ Idle Stock 5.8L under 4" cowl 'glass hood, C4 w/ Transgo shift kit, Holley 750 cfm, Edelbrock Performer RPM intake; Fluidyne Al radiator, Flexalite 175 electric fan, 1 5/8" MAC shorty headers, FRPP Al driveshaft; S&W 6-point cage; 2.5" Off road H-pipe, 2-chamber Flowmasters, 8.8" Rear w/ 3.55s; Weld wheels (15x6;15x8), Front: 225/60/15, Rear: 275/50/15 Nitto NT 555R Drag Radials; 14 x 4” K&N X-stream air filter. '92 GT (5-speed) Small In Car Video Stock 5.0L, 2-chamber Flowmasters, MAC CAI, Tri-Ax, Al pedals... "Red, thou art my companion. Hasten now your quickened metamorphosis to Green that I may conquer all who dare abide there beside me. May they be left thither behind burnt black." ---Fox Body |
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#2 |
Guest
Posts: n/a
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![]() Your best bet would be to build the 8.8 if you want to have it handle that amount of HP.
I had mine built to handle alotta abuse : 31-spline axles C-clip eliminators T/A cover Auburn Pro 3.73 's see many people run high 10's to low 12's with this set-up.I will say the weak link that some people have in this set-up is the Auburn Pro as once it wears out,it's no good as it cannot be rebuilt,so other then that,it's a pretty solid combination.In your case,I might even consider getting axles with more splines yet. If you can find a 9inch set-up I would get that if you dont feel like building the 8.8 |
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#3 |
Mustang Maniac
Join Date: Sep 2000
Location: GA, U.S.A
Posts: 2,266
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![]() Well, I know the 9 is stronger, but it is also heavier, I've felt the difference. I'm ALWAYS considering the weight I add to the car. But then again, it ain't so bad to have a little weight back there.
I plan on running at least high 10s. Is it worth the effort or money to build an 8.8" or just get a 9" and throw in some gears? In terms of money, how much would a reliable (new or used) 9" cost and how much would a reliable 8.8" cost to either build the one I've got or buy a strong new aftermarket one. Are the prices or efforts comparable or not??
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351W-powered 1979 Ford Mustang Ghia notchback '79 Video @ Idle Stock 5.8L under 4" cowl 'glass hood, C4 w/ Transgo shift kit, Holley 750 cfm, Edelbrock Performer RPM intake; Fluidyne Al radiator, Flexalite 175 electric fan, 1 5/8" MAC shorty headers, FRPP Al driveshaft; S&W 6-point cage; 2.5" Off road H-pipe, 2-chamber Flowmasters, 8.8" Rear w/ 3.55s; Weld wheels (15x6;15x8), Front: 225/60/15, Rear: 275/50/15 Nitto NT 555R Drag Radials; 14 x 4” K&N X-stream air filter. '92 GT (5-speed) Small In Car Video Stock 5.0L, 2-chamber Flowmasters, MAC CAI, Tri-Ax, Al pedals... "Red, thou art my companion. Hasten now your quickened metamorphosis to Green that I may conquer all who dare abide there beside me. May they be left thither behind burnt black." ---Fox Body |
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#4 |
Registered Member
Join Date: Jan 2002
Location: Va
Posts: 1,122
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![]() You've spent this much money on the motor now it's time to consider rear-ends. Don't waste your money upgrading the 8.8. You'll spend more in the long run. So what if it adds a little weight..you can still take weight out of the car in other areas. Get a good 9" rear with Moser 31 spline axles and c-clip eliminators. get the 5/8 studs for the rearend. Throw in some 3.73's and go at it. You might want to look at coil over shocks..say about a 50/50 in the rear.
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68 Camaro Gene Fulton 632ci Two stages of Jug 8.41 164mph Rockingham 1-26-03 |
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#5 |
Registered Member
Join Date: Jan 2001
Location: Moline Il
Posts: 901
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![]() A 9 inch with C-Clip eliminators??
![]() ![]() I have less than $1000 in my 8.8. 33 spline Strange axles, C-Clip elims, spool, gears, girdle, rebuild kit, and powdercoating. It would take me deep into the 9's if I chose to. If I had it to do over again I would have 9 inch ends welded on. The C-Clip eliminators required on the 8.8 always leak. Andy
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88 coupe 91 LX NMRA Pure Street 5120 |
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#6 |
Registered Member
Join Date: Jan 2002
Location: Va
Posts: 1,122
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![]() OMG sorry Fox. I had read about what mustangguy said about c-clips and it stuck in my head for some reason and i put it down. My bad. Sorry bout that guys.
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68 Camaro Gene Fulton 632ci Two stages of Jug 8.41 164mph Rockingham 1-26-03 |
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#7 |
NX dealer-man
Join Date: Sep 1998
Location: Peoria, Illinois
Posts: 977
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![]() I'd recommend staying with the 8.8 rear, as they are good enough to take you past 1000HP when setup properly... cheaper than it would be to build a 9" combo that doesn't take as much HP to drive as a stock type 9"... (i.e. fabbed 9" housing, gun drilled axles, all the trick stuff,etc.$$$)
If you plan on going upwards of 550-600hp and plan on torturing it on the dragstrip, then the only way to go is 33 spline axles, a spool, and c-clip eliminators or 9" housing ends as Andy pointed out... I had problems with leaky c-clips using the paper gaskets, but have lessend the problem by using a bead of RTV silicone and letting it 'skin' before bolting the axles up ![]() ...here's the setup I'll be using to get me deep into the 9's click here for a current shot, and... click here for a shot from a few weeks ago. -L8R! |
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#8 |
Registered Member
Join Date: Sep 2002
Location: southeast texas
Posts: 90
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![]() stay 8.8...good combo last post just add rear end bearing support...good insurance for 8.8. leave the 9 in to the guys in 9/8sec or better zone or those guys with a 6000lb 4x4 truck 14in lifts and 44's.
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AFR 1492 heads,Track Heat Intake, d.s.s super pro bullet 331, lakewood bell, king cobra, 3550 ,UPR shifter, aluminum shaft, 4.10, 31-spline, spool,hoosier27x10, moroso ds-2, 175-juice, egt...11.40 on motor spray pass coming. |
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#9 |
gear banger
Join Date: Aug 2000
Location: CHICAGO
Posts: 1,144
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![]() I would stay with the 8.8 also. It can handle 600rwhp with no problem with aftermarket axles, girdle, and weld the tubes to the housing. The differental will be the tricky part. If you want to launch on slicks IMO no differential will hold up but the detroit locker, or a spool. I completly blew up a aubern into 100 peices (no joke) pulling 1.46 60ft times and they are supposed to be strong.
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79 Hatch: NA 347, Stage 2 Canfield Heads, Victor JR. Intake, Blueprinted Holley 750 HP, Solid Roller Cam, Shooting for 10's on motor 93 LX: Tremec, dual friction clutch, fms flywheel, Hedman shorties, O/R H-pipe Ricer hater's club member #49 |
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#10 |
Mustang Maniac
Join Date: Sep 2000
Location: GA, U.S.A
Posts: 2,266
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![]() Thanks alot guys, all of you. This is exactly the type of information I was looking for.
Concerning the diff units, any preferences b/t: Richmond Auburn Pro Strange SVO Traction Lok Torqline? Please clarify for me though, what are the "full spools" (or mini spools)? And what are their purposes. And also, what are C-clips and why are they eliminated. I've never really looked into rear end stuff, just only about getting gears put in for me. Thanks for helping me to learn. ![]()
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351W-powered 1979 Ford Mustang Ghia notchback '79 Video @ Idle Stock 5.8L under 4" cowl 'glass hood, C4 w/ Transgo shift kit, Holley 750 cfm, Edelbrock Performer RPM intake; Fluidyne Al radiator, Flexalite 175 electric fan, 1 5/8" MAC shorty headers, FRPP Al driveshaft; S&W 6-point cage; 2.5" Off road H-pipe, 2-chamber Flowmasters, 8.8" Rear w/ 3.55s; Weld wheels (15x6;15x8), Front: 225/60/15, Rear: 275/50/15 Nitto NT 555R Drag Radials; 14 x 4” K&N X-stream air filter. '92 GT (5-speed) Small In Car Video Stock 5.0L, 2-chamber Flowmasters, MAC CAI, Tri-Ax, Al pedals... "Red, thou art my companion. Hasten now your quickened metamorphosis to Green that I may conquer all who dare abide there beside me. May they be left thither behind burnt black." ---Fox Body |
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#11 |
Registered Member
Join Date: Jan 2001
Location: Moline Il
Posts: 901
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![]() I dont have any input on the different differentials, I have a spool. I dont know much about mini spools, I have seen them in dirt track circle cars, never in a street car.
As for C-clips, they are what retain the axles in a stock 8.8. NHRA rules mandate the use of an aftermarket axle retention device(c-clip eliminators) when going faster than 10.99, or while using a locked differential. The Ford 9" uses plates that are held in place with a pressed on ring. These plates bolt to the rearend housing and hold the axle in place. It is not recommended to use c-clip elims on the street, they are not meant to handle the side to side load street driving puts on them. Hope this helps Andy
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88 coupe 91 LX NMRA Pure Street 5120 |
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#12 |
Moderator
Join Date: Dec 1999
Location: Livonia, MI, USA
Posts: 1,194
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![]() Contact Lidio www.alternativeauto.com . He built Dan McClain's 8.8" that has taken its fair share of abuse
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Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com |
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#13 |
Registered Member
Join Date: Dec 2000
Location: Rockmart GA usa
Posts: 24
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![]() On the other hand, I have had my car together pulling 1.48 60 ft.'s on stock axles and a mini spool.
Just waiting on the pieces to scatter |
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#14 | |
Mustang Maniac
Join Date: Sep 2000
Location: GA, U.S.A
Posts: 2,266
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![]() Quote:
![]() I'll check out alternative auto. Thanks.
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351W-powered 1979 Ford Mustang Ghia notchback '79 Video @ Idle Stock 5.8L under 4" cowl 'glass hood, C4 w/ Transgo shift kit, Holley 750 cfm, Edelbrock Performer RPM intake; Fluidyne Al radiator, Flexalite 175 electric fan, 1 5/8" MAC shorty headers, FRPP Al driveshaft; S&W 6-point cage; 2.5" Off road H-pipe, 2-chamber Flowmasters, 8.8" Rear w/ 3.55s; Weld wheels (15x6;15x8), Front: 225/60/15, Rear: 275/50/15 Nitto NT 555R Drag Radials; 14 x 4” K&N X-stream air filter. '92 GT (5-speed) Small In Car Video Stock 5.0L, 2-chamber Flowmasters, MAC CAI, Tri-Ax, Al pedals... "Red, thou art my companion. Hasten now your quickened metamorphosis to Green that I may conquer all who dare abide there beside me. May they be left thither behind burnt black." ---Fox Body |
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#15 |
Registered Member
Join Date: Sep 2002
Location: southeast texas
Posts: 90
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![]() The diffs you listed are great for mild applications but will wear out very soon under repeated lanches.....so if you're wanting to stay streetable and still have a dependable lock go with a detroit locker; its noisy but very tough and will still slip to turn(this is when its noisy...sounds like a ratchet clicking) If all else fails with your decision talk to some of the guys at the track and find out who the local hot rod rear end mechanic is (car proctologist)he will be able to explain in greater detail about the different diffs and the reliability of each. Good luck!
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AFR 1492 heads,Track Heat Intake, d.s.s super pro bullet 331, lakewood bell, king cobra, 3550 ,UPR shifter, aluminum shaft, 4.10, 31-spline, spool,hoosier27x10, moroso ds-2, 175-juice, egt...11.40 on motor spray pass coming. |
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#16 |
Registered Member
Join Date: Sep 2002
Location: southeast texas
Posts: 90
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![]() p.s.
another option may be an air locker...dont know anyone around here having one but they do have them for mustang 8.8, dont know how reliable they are either but may be somthing to ask the proctologist!
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AFR 1492 heads,Track Heat Intake, d.s.s super pro bullet 331, lakewood bell, king cobra, 3550 ,UPR shifter, aluminum shaft, 4.10, 31-spline, spool,hoosier27x10, moroso ds-2, 175-juice, egt...11.40 on motor spray pass coming. |
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