what kind of rear end do I have ? 87 camaro z28
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Car: Red 1988 Iroc-Z hard top
Engine: 305 ( LSX swap soon )
Transmission: 700r4 ( T-56 swap soon )
Axle/Gears: What ever gear that come in 88 iroc
what kind of rear end do I have ? 87 camaro z28
I dont know if this car came with 5.7 or 5.0, or manual or auto. cause the last owner swap in a 6.6l with th400, but he say the rear end was all factory, he dint touch it. So what kind of rear end do I have and how many bolt ? thanks
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: what kind of rear end do I have ? 87 camaro z28
Unless you crawl under the car to have a look, it's only a guess. It's probably a Borg Warner 9 bolt with 3.27 gears. The other option is a 7.5" 10 bolt.
Looking under the car to count the bolts on the diff cover can tell you if it's a 9 or 10 bolt but that's all the information you'll be able to get without taking the cover off the diff to see exactly what's inside. Never assume it's still original.
Looking under the car to count the bolts on the diff cover can tell you if it's a 9 or 10 bolt but that's all the information you'll be able to get without taking the cover off the diff to see exactly what's inside. Never assume it's still original.
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Car: Red 1988 Iroc-Z hard top
Engine: 305 ( LSX swap soon )
Transmission: 700r4 ( T-56 swap soon )
Axle/Gears: What ever gear that come in 88 iroc
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Re: what kind of rear end do I have ? 87 camaro z28
What Gear Ratio Do I Have?
Jerk the diff cover. The numbers are stamped on the ring and pinion. The RPO’s are usually found in the center console:
41 : 15 = 2.73 (RPO GU2)
41 : 14 = 2.93 (RPO GU3)
40 : 13 = 3.08 (RPO GU4)
42 : 13 = 3.23 (RPO GU5) / Approx. RPM’s at 70 mph--2133
41 : 12 = 3.42 (RPO GU6) / Approx. RPM’s at 70 mph--2255
41 : 11 = 3.73 (RPO GT4) / Approx. RPM’s at 70 mph--2463
Or from Randy’s Ring and Pinion:
Jack up one tire if you have an open diff, or both tires if you have a working posi or locking differential. Rotate the tire one full revolution for posi’s and lockers and 2 full revolutions for open diffs. Carefully count the number of full revolutions the driveshaft makes. This is your gear ratio. In other words, if the drive shaft turns 3 ¾ turns, you probably have a 3.73 gear ratio. Turning the tire for twice the number of full revolutions and dividing the drive shaft revolutions by two will give you a more accurate reading.
Axle tube codes can be found in the following link (though rust usually makes them indecipherable, and they, like the RPO codes, indicate how the car was equipped new, and not necessarily what’s currently in place): http://sethirdgen.org/reardata.htm
Additive if the rear has limited slip.
JamesC
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Car: Red 1988 Iroc-Z hard top
Engine: 305 ( LSX swap soon )
Transmission: 700r4 ( T-56 swap soon )
Axle/Gears: What ever gear that come in 88 iroc
Re: what kind of rear end do I have ? 87 camaro z28
Thanks all ! im plan running redline 75w90 gear oil on it, im just wonder if redline is good for these rear diff ? any body have any recomment ?
Last edited by Thirdgen6.6l; 04-06-2010 at 11:10 AM.
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