Found a 9" to replace my POS 10 bolt.
03-27-2001, 09:21 AM
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Car: 1992 Camaro Z28
Engine: 406
Transmission: T56
Axle/Gears: 4.10 GM 7.5 10-bolt
Found a 9" to replace my POS 10 bolt.
It's out of a '77 Lincoln Continental. It has disc brakes and is in good condition. Does anyone know the width of this rearend? How much will I have to narrow it? Besides the mounts, bolt pattern, and yoke, is there anything else I should be aware of? I can get it for under $200. Good price? What posi carrier should I buy?
I'll probably go to the junkyard this weekend and measure it, but was wondering what everyone knew.
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1992 Camaro Z28; Engine:383 w/Ported Edelbrock RPM heads. Lunati Solid Roller Cam 224/232 .502/.502, Fluidampr, Comp Cams 1.5 Roller rockers and lifters, Comp Cams Triple Valvesprings, SVO 30 lb injectors. Holley/Walbro 255 lph in-tank pump, Haltech E6GM DFI, SLP 1 3/4" headers, 4" Mufflex, T56, 4.10. Super Ram. 17" X 9.5" Ronal FireHawk Rims w/ 275 40ZR17 Bridgestone RE 730's up front and Nitto Drag NT 555R's out back.
Double-Pump This! EFI Rules!
I'll probably go to the junkyard this weekend and measure it, but was wondering what everyone knew.
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1992 Camaro Z28; Engine:383 w/Ported Edelbrock RPM heads. Lunati Solid Roller Cam 224/232 .502/.502, Fluidampr, Comp Cams 1.5 Roller rockers and lifters, Comp Cams Triple Valvesprings, SVO 30 lb injectors. Holley/Walbro 255 lph in-tank pump, Haltech E6GM DFI, SLP 1 3/4" headers, 4" Mufflex, T56, 4.10. Super Ram. 17" X 9.5" Ronal FireHawk Rims w/ 275 40ZR17 Bridgestone RE 730's up front and Nitto Drag NT 555R's out back.
Double-Pump This! EFI Rules!
03-27-2001, 08:33 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
It'll be a couple of inches wider than a third gen diff. With everyone wanting to put fourth gen diffs into a third gen the extra width will have to be compensated the same way with proper backspaced rims. A slightly narrower 9" diff can be found in late 60's and very early 70's cars. Mustangs, Cougars, Fairlanes, Granada etc.
Take a look at this site.
http://hiqties.hypermart.net/9inch.html
It will give you an idea on what cars to look for. The thirdgen diff is very close 62". At least that's what my 9 bolt with disk brakes measures out in my shed.
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Follow my racing progress on Stephen's racing page
and check out the race car
87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season
Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662
Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association
87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley
Take a look at this site.
http://hiqties.hypermart.net/9inch.html
It will give you an idea on what cars to look for. The thirdgen diff is very close 62". At least that's what my 9 bolt with disk brakes measures out in my shed.
------------------
Follow my racing progress on Stephen's racing page
and check out the race car
87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season
Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662
Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association
87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley
03-30-2001, 01:52 PM
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Stephen, What 9 bolt do you have? what year and car is it out of? I have a "Australian" rear end. Thats what I was told and the posi casing has it stamped on it. Also the outer baring cover has it stamped on it. It is also has disc brakes. Can you tell me anything about it? I dont know what kind of gears are on it, there not stamped. They just have some numbers on it. Oh ya, its out of a '87 T/A. I was told it was a performance package for that car. How can I tell what service parts to get for the posi? Thanks
03-30-2001, 09:18 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
I've never even had the cover off mine to look inside. The RPO code is all I needed to tell my what it is.
1987 Borg Warner 9 bolt (australian). 3.27 gears, posi, disk brakes.
If your RPO sheet is gone you can still get the axle code. It should be on the passenger side axle tube on the front of the tube. The axle code can tell you what gears are in yours. If your 87 is a 350 TPI with an auto tranny then it's 3.27 gears also. 305's with a manual tranny came with 3.45 gears in 87
1987 Borg Warner 9 bolt (australian). 3.27 gears, posi, disk brakes.
If your RPO sheet is gone you can still get the axle code. It should be on the passenger side axle tube on the front of the tube. The axle code can tell you what gears are in yours. If your 87 is a 350 TPI with an auto tranny then it's 3.27 gears also. 305's with a manual tranny came with 3.45 gears in 87
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