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72LSLB · 02-14-2017, 02:42 PM

My 72 currently has a spool rear end and I'm going to have it changed over to most likely a posi or maybe an open. I was wondering what gear would be best for my setup. Will be a once in a while cruiser to work and to shows.

The engine is a 2007 4.8 LS with a 4l60e trans, controlled by a Mega Squirts MS3 Pro controller. The rear tires will be 28.66 in diameter. I'm not sure what the overdrive ratio is for a 4l60e trans.

Can anyone help me with the formula for figuring this out? I was thinking on going with a 3:55 or 3:73.

Thanks

02-14-2017, 02:42 PM	#1
72LSLB Registered User Join Date: Feb 2017 Location: Harvard Illinois Posts: 76	Ring and pinion choice for 4.8 LS My 72 currently has a spool rear end and I'm going to have it changed over to most likely a posi or maybe an open. I was wondering what gear would be best for my setup. Will be a once in a while cruiser to work and to shows. The engine is a 2007 4.8 LS with a 4l60e trans, controlled by a Mega Squirts MS3 Pro controller. The rear tires will be 28.66 in diameter. I'm not sure what the overdrive ratio is for a 4l60e trans. Can anyone help me with the formula for figuring this out? I was thinking on going with a 3:55 or 3:73. Thanks __________________ 1972 C10 Custom Deluxe 4.8 LS 4l60e