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Old 07-31-2019, 02:48 PM   #1
Tommy434
 
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Drives: 2014 SS 2010 SS 93 Camaro z28
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ZL1 diff question

So been looking for a ZL1 diff along with 30 other people in the ZL1 section and there so expensive on eBay I think I’ll buy a new one found the 3.73 ZL1 for 2100. Brand new, the z28 is little cheaper and lighter same size ring gear I believe but aluminum case will these hold up as well? Anyone try testing 1 on 900 plus? Thanks Tommy
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Old 07-31-2019, 02:56 PM   #2
Crash76
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ZL1 at a minimum if you are drag racing at 900rwhp
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Old 07-31-2019, 03:05 PM   #3
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Yes drag racing may be 800 not sure single turbo but weight is killing me steel block and 4l80e turbo and piping I’ve added 300lbs to this pig
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Old 07-31-2019, 08:22 PM   #4
Crash76
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Strange makes a rear end for the 5th gen ... 20lb heavier than stock
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Old 07-31-2019, 08:51 PM   #5
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Yea I’ve seen most of the aftermarket stuff but they priced themselves out of the market in my opinion
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Old 08-12-2019, 11:14 AM   #6
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Just to be clear, the Z28 is still the 218mm ring gear in an aluminum housing, but has a Torsen style carrier and cooler. The Zl1 is a 250mm ring gear with a clutch style carrier in a cast iron housing. Much stronger than the Z28 diff, but much heavier too.

IMO, ZL1 for drag racing, Z28 for road racing or just build a stock 10 bolt because Z28 rears are as much as a ZL1.

The 9 inch, S60 stuff is for guys running under 10 sec.

It also matters how you are getting to 900. If it's a PD blower, you need more rear. Turbos and centri blowers generally don't come off the line as hard. There are 900hp turbo guys running 10 bolts.
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