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Old 07-11-2015, 06:59 PM   #31
05ls7gto
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Differential was installed and heat cycled per break-in recommendations. Fit and finish is top notch as anticipated, the pumpkin looks amazing underneath the car.






Seat time wise I haven't done anything crazy besides cruise around, but here are my initial thoughts: The rear is super quiet, no clunks or whines. It drives extremely smooth, both in straight line and through curves/turns. It may be a placebo effect, but with the Harrop diff cover the car does feel my planted in the rear at all times.

I've got a few things to address with the car before I can go WOT and really try out the setup, but I am completely satisfied thus far. Looking forward to seeing how this setup treats me when I decide to head to the track.
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Old 07-12-2015, 07:36 PM   #32
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Do you just leave the plastic shield thingy off? The one that covers the v-brace.
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Old 07-12-2015, 07:37 PM   #33
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Looks badass btw
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Old 07-12-2015, 08:46 PM   #34
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Looks good. I think that Harrop cover goes a long way towards improved longevity. That was one of my early mods and the extra fluid the unit holds makes it run quieter and cooler in my opinion.
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Old 07-14-2015, 06:33 PM   #35
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Quote:
Originally Posted by cw34...View Post
Do you just leave the plastic shield thingy off? The one that covers the v-brace.

Yeah, I haven't run my undertray for a while because mine sagged in the center. I'm sure it negatively impacts aerodynamics slightly and makes the diffuser more prone to fly off, but I used nuts/bolts on my MM diffuser versus the stock plastic pins.
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Old 07-18-2015, 04:49 PM   #36
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awesome thread. what a result! One day I hope to do similar. Minus someone dropping it and so forth.
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Old 01-09-2017, 05:28 PM   #37
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Figured I'd update this thread since I've had recently had work done.

About a year ago I had a GForce axle stub work it's way out of the diff, which was signified by diff fluid leaking out and an ABS fault being triggered. As noted in some previous threads the GForce stub had loose fitment in the Wavetrac differential, so I opted to swap in some factory stubs while I waited on custom pieces from a certain person. As you can expect driving a high HP car with meaty tires the stock stubs didn't fair too well and I ended up snapping the passenger stub inside the housing.



Extracting the broken piece deep in the housing was a PITA, so I opted to instead drop the differential to get the job done. At this point I figured with the diff out I'd send it in to my builder for an inspection for peace of mind. The broken stub was extracted and overall setup inspected and everything was checked out. The differential unit itself was event sent in to Wavetrac to inspect and buttoned back up.



At this point I chose to change things up with the aesthetics of my differential. With my car being a show and go setup I wanted something flashy, my heart was set on a black chrome finish. Needless to say my desires were met with this custom black chrome finish, which to my belief is the only M80 housing in such a finish. The Harrop cover was also cleaned up in a hot-tank, letters repainted and cleared along with other miscellaneous tasks.




Differential is arriving back into my hands this week, and I'll grab some higher quality photos of the finish. Photos alone probably aren't doing it much justice.
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Old 01-09-2017, 08:17 PM   #38
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Man that looks awesome! How did the stub break? Was it on launch or a gear shift?
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Old 01-10-2017, 12:16 AM   #39
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It does look awesome, but for the money the OP spent, he could have bought a complete 9" differential which would never break.
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Old 01-10-2017, 02:35 AM   #40
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Quote:
Originally Posted by ocgoat...View Post
Man that looks awesome! How did the stub break? Was it on launch or a gear shift?

It happened grabbing 2nd gear. I knew I was testing fate running on the stock stubs so I knew better than to attempt launching.

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It does look awesome, but for the money the OP spent, he could have bought a complete 9" differential which would never break.

I believe this was discussed earlier in the thread, but the 9" kit is fugly. The differential unit itself breaking isn't even the slightest concern to me, there are several members running a build of this caliber without issue including some balls to the wall dedicated drag cars.
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Old 01-10-2017, 03:18 AM   #41
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Quote:
Originally Posted by Jontall...View Post
It does look awesome, but for the money the OP spent, he could have bought a complete 9" differential which would never break.

And where did he state that his broke?
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Old 01-10-2017, 04:42 AM   #42
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If every person on here was concerned about getting the best bang for their buck, we'd all have the same builds. I am going for a similar setup but with a Trutrac. I don't really drag race much, but I have fun building it all and making it my own.
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Old 01-12-2017, 03:10 PM   #43
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Despite the popular consensus, the M80 is a rather robust unit. Its downfall is that the GTO is the only vehicle in this country to have one, so parts are expensive.

I run a Trutrac in my set-up. I haven't tested it at the strip because I haven't gone in almost seven years.
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Old 01-31-2017, 10:22 PM   #44
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Darn that 2nd gear shift after all of that work!!
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Old 03-01-2017, 12:23 PM   #45
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05ls7gto, I sent you a PM!

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