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Author
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Topic: Rear end dilemma
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Mpcoluv
Gearhead Posts: 1333
From: Charlotte NC usa
Registered: Apr 2001
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posted 01-05-2004 07:19 PM
   
Guys, I need the benefit of your experience on rear ends.
When I slap the 372c back together and install it in the car, my rear end (8") will be the cars weak link. I am guessing/hoping that my motor will make in the 465 horse range at the flywheel. I have a 4 speed.
I already have (sitting around) a 8" detroit locker. Can I get by with the 8" if I use the Currie center section? or will it still be marginal, and I need to bite the bullet and swap in a 9".
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V-8
Gearhead Posts: 323
From: TURKEY/Istanbul
Registered: Dec 2003
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posted 01-05-2004 07:35 PM
Run with 8".No problems will be occur with 465hp.
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 01-05-2004 07:35 PM
Yup! It will hold up.
With a DL and a Currie/Strange center section you would be hard pressed to break it with 565 HP. 
Just make sure to stud the pinion retainer.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,&'03
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Mpcoluv
Gearhead Posts: 1333
From: Charlotte NC usa
Registered: Apr 2001
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posted 01-05-2004 07:38 PM
Uhhh...What is " Stud the pinion retainer"?
BTW, what is the power limit for 34 year old axles?[This message has been edited by Mpcoluv (edited 01-05-2004).]
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V8 Thumper
Gearhead Posts: 4638
From: Phoenix, Arizona
Registered: Dec 2001
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posted 01-05-2004 07:54 PM
Rather than using the stock bolts to fasten the pinion support to the case, use good quality grade 8 studs threaded into the case; the pinion support seats over the studs, and then you nut the studs. I've been (recently) corrected on 28 spline axles and how much power they can handle... that a high 11 second car on slicks won't hurt them. I dunno... stickshifted launches  ------------------
1965 GT coupe, 333ci aluminum headed/solid cammed stroker, four speed, 3.70:1 9" All Blue Oval, no blue bottle
http://mustangsandmore.50megs.com/V8Thumper.html
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mainer
Gearhead Posts: 157
From: Bryant Pond, Maine
Registered: Sep 2003
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posted 01-05-2004 07:55 PM
Good info. I have an 8" in my 68 and most have said I must go to a 9" in that the 28 spline axels won't hold up to the power of my new motor. Can I stick with the 8" if I go with new hardened axels?What does a currie/strange center sell for? My new motor on the dyno turned 526hp.
Thanks,
Don
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Mpcoluv
Gearhead Posts: 1333
From: Charlotte NC usa
Registered: Apr 2001
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posted 01-05-2004 08:04 PM
quote:
Originally posted by mainer:
Good info. I have an 8" in my 68 and most have said I must go to a 9" in that the 28 spline axels won't hold up to the power of my new motor. Can I stick with the 8" if I go with new hardened axels?What does a currie/strange center sell for? My new motor on the dyno turned 526hp.
Thanks,
Don
The Currie center section goes for aroung $365 or so. Same as an aluminum 9" one.
BTW who has cheap prices on currie stuff now?
Summit seems to be not so cheap now....
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V-8
Gearhead Posts: 323
From: TURKEY/Istanbul
Registered: Dec 2003
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posted 01-05-2004 08:05 PM
In 2002 season my 351w makes 380hp at flywheel and 200hp nos plate shot.Car weight 3222 with me.26/8.5/15 MT drag slicks.8" rear,4.11 richmond,auburn lock.I had no problems with rear-end.(always problems with transmission) http://www.otospor.com/resim/temmuz2002/42.jpg[This message has been edited by V-8 (edited 01-05-2004).]
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 01-06-2004 12:18 AM
quote:
Originally posted by V-8:
In 2002 season my 351w makes 380hp at flywheel and 200hp nos plate shot.Car weight 3222 with me.26/8.5/15 MT drag slicks.8" rear,4.11 richmond,auburn lock.I had no problems with rear-end.(always problems with transmission) http://www.otospor.com/resim/temmuz2002/42.jpg[This message has been edited by V-8 (edited 01-05-2004).]
What kind of trans?
PS, I love the name (Chevy Killer) 
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Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,&'03
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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V-8
Gearhead Posts: 323
From: TURKEY/Istanbul
Registered: Dec 2003
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posted 01-06-2004 06:40 AM
C-4 and C-6.
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 01-06-2004 10:14 AM
Contact JPT to straighten out your trans issues. They ship world wide and have units in every continent.
517-663-0578 or [email protected]They are VERY bad with e-mail so best to call. ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,&'03
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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V-8
Gearhead Posts: 323
From: TURKEY/Istanbul
Registered: Dec 2003
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posted 01-06-2004 12:58 PM
Thanks for your help guy, but i already put TCI trans swap kit and TH-350 trans,A-1 special made convertor.I have no headaches and no problems with trans now 
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Moneymaker
Administrator Posts: 26811
From: Lyons, IL, USA
Registered: May 99
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posted 01-06-2004 01:27 PM
quote:
Originally posted by V-8:
Thanks for your help guy, but i already put TCI trans swap kit and TH-350 trans,A-1 special made convertor.I have no headaches and no problems with trans now
Yuk, a GM trans in a Mustang. 
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Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,&'03
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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V-8
Gearhead Posts: 323
From: TURKEY/Istanbul
Registered: Dec 2003
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posted 01-06-2004 01:40 PM
Im unhappy to using a GM trans in a Mustang but really i have got no headaches and no problems with trans now.
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654212spd
Gearhead Posts: 131
From: st.louis mo usa
Registered: Apr 2003
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posted 01-06-2004 05:59 PM
thats ok v-8 i run one too im not sick of it because my ford motor is making all the power
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Fordwiser
Gearhead Posts: 428
From: Metamora, Illinois
Registered: Dec 2000
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posted 01-06-2004 06:00 PM
8in. vrs. 9in. debateRemember though, this sport is addictive, you may want to keep going faster! It's cheaper to only have to spend money once! Roger
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V-8
Gearhead Posts: 323
From: TURKEY/Istanbul
Registered: Dec 2003
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posted 01-06-2004 06:07 PM
quote:
Originally posted by 654212spd:
thats ok v-8 i run one too im not sick of it because my ford motor is making all the power
What are you using (engine and trans)?
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kid vishus
Gearhead Posts: 6395
From: middle of NC
Registered: Oct 2000
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posted 01-06-2004 06:17 PM
It's generally hard to break rear end parts with street tires. They normally just don't hook hard enough to break stuff like axles or gears. Slicks on the other hand is a different story. I would be a little hesitant about putting good slicks on it and running it on a sticky track. Something might "give", and it wont be pretty.
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654212spd
Gearhead Posts: 131
From: st.louis mo usa
Registered: Apr 2003
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posted 01-06-2004 06:20 PM
stroke 351w to 421 cid with powerglide with only 6 passes on motor little tuning has gone9.68@140
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V-8
Gearhead Posts: 323
From: TURKEY/Istanbul
Registered: Dec 2003
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posted 01-06-2004 06:29 PM
Hey 654212spd;
Are you runing with stock block?
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Daniel Jones
Gearhead Posts: 872
From: St. Louis, MO
Registered: Aug 99
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posted 01-06-2004 07:07 PM
The only street car (on street tires) I've seen that hurt a 9" was a friend's 428 powered Cobra replica. It ran in the high 11's at the strip which is pretty good on street tires and road race suspension. It took a Daytona pinion bearing support to fix his problems. Dan Jones
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654212spd
Gearhead Posts: 131
From: st.louis mo usa
Registered: Apr 2003
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posted 01-06-2004 10:24 PM
v-8 no im using the non siamese motorsport block
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 01-07-2004 01:08 AM
Sorry to jump but I have ask. how about a stock 8" with traclok. Will it be ok with 350-450 hp and street slicks, or ET streets ?------------------
SCOOP 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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Buster
Gearhead Posts: 1553
From: Hurricane alley
Registered: May 2002
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posted 01-13-2004 07:04 PM
quote:
Originally posted by 654212spd:
stroke 351w to 421 cid with powerglide with only 6 passes on motor little tuning has gone9.68@140
What heads, intake and came are you using 654212spd?
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Fastymz
Moderator Posts: 20638
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 01-31-2004 06:46 PM
quote:
Originally posted by Moneymaker:
Yup! It will hold up.
With a DL and a Currie/Strange center section you would be hard pressed to break it with 565 HP.
Just make sure to stud the pinion retainer.
Would it be better(less expensive and just has strong) to buy that center section for my 8" rear I have now, or install a 9" ? ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 2.26 60'S
14.9 @ 90.86MPH 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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Dubz
Gearhead Posts: 1888
From: Manitoba Canada
Registered: Oct 2002
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posted 01-31-2004 07:27 PM
What would the max power handling be out of a stock 28 spline 9" with a non-WAR case??------------------
1974 Gran Torino (351W/c6)
My Page
Mustang&Fords suggested a Torino restomod, but i have yet to see one...so i'm building one
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