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Author
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Topic: 9" Rearend Questions
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grandestang
Gearhead Posts: 375
From: Lake Bluff, Illinois USA
Registered: Jan 2003
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posted 06-30-2003 12:23 AM
   
My car is currently equipped with a 9" 3.00:1 open differential with 28 spline axles. I have a few questions in upgrading to 3.50 or 3.55 gears and Trac-loc. First off, I have hear that limited slip differentials do allow some slippage and can even allow one wheel burn outs. (Maybe when they wear out?) But a Detroit Locker will never let this happen. So is a Locker too extreme for the street? Or will a well built Trac-loc ensure dual snake trails every time?
Next, what is the cheapest way to have all of this done? Do you know of any good places that sell the complete unit that are a little cheaper than currie? And finally are the 28 spline axles okay for a 350-400 horse engine? Or should I just go to 31 splines while am at it?
Sorry, just venting alot of questions I have, please help in anyway, I don't know very much about this subject.Paul ------------------
1970 Grande
H code 351W FMX
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jsracingbbf
Gearhead Posts: 2904
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 06-30-2003 12:51 AM
check with Danny at Rear Gears, I think he can beat currie's prices. Tom's differentials in paramount Cali. is a Big traction Lok advocate. he claims he has run one under a alky rail car.  Must be one pretty tough trac-lok. Who knows?
JS
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65_302
Gearhead Posts: 262
From: Bixby, OK
Registered: Jul 2001
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posted 06-30-2003 08:56 AM
Speaking from experience, a Detroit Locker is fine on the street. You may hear a little noise when turning, but not much. And you will get traction to both wheels. A word of caution. Be sure you eliminate all wheel hop before you hammer it. We broke one and stripped the splines of a new Moser 31 spline axle after 12 passes at the strip because of the slightest of wheel hop. We added CEs Slide-A_Links and solved that problem. And this was on a car that has <300 rwhp.
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Fstln69
Gearhead Posts: 560
From: Westmont,il
Registered: Jan 2003
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posted 06-30-2003 08:26 PM
Does anyone know who would have parts for the trac-loc?Turns out thats what i have and the spring preload plate and one spring are broke and need a spider thrust washer.Called local guy today that i got clutch plates from but didn't hear back so i may need some options..any help is needed
Dennis
PS.Alex if you read this i will stop by in the next day or so and drop those other plates off
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TomP
Gearhead Posts: 6007
From: Delta BC Canada
Registered: Dec 99
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posted 06-30-2003 09:33 PM
Ford still sells the clutches last time i checked.
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Rustang
Gearhead Posts: 805
From: Clarion PA
Registered: Nov 2000
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posted 07-01-2003 06:59 AM
Check Ford Racing's catalog. I just bought a set of clutches last spring. The price is probably better than you'll find anywhere and the quality won't be suspect (there's some aftermarket stuff out there I've seen at swap meets)
I also think Ford Racing offers a complete rebuild kit for the traction loc.
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'68 mustang 351 clevor- 10.92@124
'67 Stang, 351W -11.18@118
'69 351C Torino-14.90@100
'78 Pickup 351W-15.56@88
'79 Pickup 460 ET=??
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V8 Thumper
Gearhead Posts: 4652
From: Phoenix, Arizona
Registered: Dec 2001
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posted 07-01-2003 07:08 AM
The Ford Motorsport 9" T-loc kit is p/n #M4700A. Moneymaker Racing may have them in stock  ------------------
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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Fstln69
Gearhead Posts: 560
From: Westmont,il
Registered: Jan 2003
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posted 07-01-2003 07:34 PM
Thanks guys.Wife ran to Vefron Super Gears this morning and he had all the pieces i needed.------------------
69 fairlane 351w 12.94@103mph before M&M.. [email protected]
always in search of more HP and faster ET'S Fstln69 Pics Page
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