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09-21-2021 #21
Thanks for the info. If I had to do this over again I would probably go with the 8.8 for the weight savings and decrease in parasitic loss, although I have a 2012 boss 302 with an 8.8 that has a little whine to it as well. The dealer replaced the ring gear and pinion and all bearings under warranty twice, and there was no improvement. Its not terrible, but it is in a car that has a ton of rubber isolation, I would imagine it would be a bit worse if the rear suspension was all heim joints (like my mach 1). I could go to the effort of swapping the axle, which would require a bit of fabrication work and a different torque arm and watts link mount making it relatively expensive, but it seems to me that there is risk that there won't be an improvement in noise.
This build has sacrificed most comforts for the sake of performance, so, some noise is tolerable.....actually a lot of noise is tolerable, but the volume and frequency of this gear whine i currently have is enough that I can't stand to drive the car at all.
Its starting to sound like I should give the old oem gears a try.
Zach
1970 Mach 1 build - Half-Breed (pro-touring.com)