Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Rear ends for 500HP?

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Old Sep 2, 2011 | 06:12 PM
  #1  
TPI-Formula350-'s Avatar
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From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Rear ends for 500HP?

My 9 bolt is starting to go, think the friction cones are wasted. I dont want to put money into it if it wont hold together with my engines HP. So I'm starting to look at rears, I know ford 9" are great but does anyone else make a direct thirdgen bolt in rear?? and how much money are they going for?? Thanks
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Old Sep 2, 2011 | 06:35 PM
  #2  
TPI-Formula350-'s Avatar
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Joined: Aug 2003
Posts: 1,644
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From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: Rear ends for 500HP?

http://www.hawksthirdgenparts.com/ca...wposiunit.aspx
found this one at Hawks just wondering if anyone found them for less?
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Old Sep 2, 2011 | 08:13 PM
  #3  
AlkyIROC's Avatar
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Rear ends for 500HP?

Aftermarket bolt in diff choices are 9", 12 bolt and Dana 60. How much it will cost depends on what options you get with it. At the bottom end of the scale is a basic 9" housing package with axles for around $1000. A fully assembled diff with gears, posi, brakes etc, ready to bolt in, can be $2500+

You can easily spend over $1000 trying to beef up a 10 bolt but in the end, you still have a diff with a tiny ring and pinion. Although the 9 bolt is slightly better, performance parts are just about impossible to find for it so an aftermarket diff is the best choice. Do it once the first time.
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Old Sep 4, 2011 | 09:17 AM
  #4  
abray1's Avatar
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From: Malvern, Arkansas
Car: 90 IROC 2-92 Zs blk vert & prpl
Engine: stealth ram brodix track 1 ful port
Transmission: 700r4 4l80e
Axle/Gears: iroc 375 lokr 92 Z 277 pos vert 327
Re: Rear ends for 500HP?

Check out autoweldchassis.com I bought there rear housing axle, torque arm crossmember kit and could not be happier. It is mega strong and fully adjustable with sphericle ends on everything. TOP SHELF.
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Old Sep 4, 2011 | 01:59 PM
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Pocket's Avatar
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From: NC
Car: 91 Trans Am
Re: Rear ends for 500HP?

You can build an 8.8 for chump change. Upgrade to 31 spline axles and they're extremely strong on a budget

Thats assuming you have tools, skills and most importantly time to do so
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Old Sep 4, 2011 | 02:14 PM
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From: Putnam Valley, NY
Car: 1992 RS 6spd
Engine: Carbed 357c.i.
Transmission: Built T56
Axle/Gears: Soon to be Strange S60
Re: Rear ends for 500HP?

Originally Posted by TPI-Formula350-
http://www.hawksthirdgenparts.com/ca...wposiunit.aspx
found this one at Hawks just wondering if anyone found them for less?
Try centralracingparts.com, Carl is probably the best I've ever seen when it comes to product knowledge, and most importantly, customer service. He can get you a direct bolt in Strange S60 rear, which makes a ford 9" look a bit crappy for the price, and a drive shaft for an incredible price. Just call him, and talk to him. I'm not going to throw his prices out there, thats for him to do. You wont be dissapointed, trust me.
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