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Old 04-10-2007, 11:36 AM
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3:55 or 3:73 ???

I have a 67 camaro RS that's in the shop as I'm typing. It's got a stock 275HP 327, powerglide with a 12 bolt posi rear and 2:73 gears. I'm wanting to upgrade to give the car a little more bottom end, the car is a dog off the line.
I'm trying to decide on which gears to put in 3:55's or the 3:73's?? The car is not a daily driver and I drove it on the highway once when I bought it. Oh...it's got 15" 235 60 tires on it. Any suggestions would be appreciated.

Thanks !

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Old 04-10-2007, 12:03 PM
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my brother had a 68 chevelle 327 with a glide 10 bolt posi with a 3.73 gear great running around town but get out on the highway and run 80 i think he said was about 4500rpm's.don't know what tire size he had,engine stock.
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Old 04-10-2007, 12:03 PM
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im having the same problem trying to decide, search both keywords 3.55 and 3.73 and you will get a #@$%load of ideas..
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Old 04-10-2007, 12:05 PM
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3.55 or 3.73???

If you don't do a lot of Driving above 60 mph [how many kph is that?], the 3.73 is a good choice.

Around here [just outside of washington DC ] I travel alot on the interstate and to avoid getting run over you have to run 70- 75 mph.so in this area a 3.55 would be my choice.

Even cooler still, would be 3.73s with a 700R4, best of both worlds. But we'll save that for another thread.
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Old 04-10-2007, 12:05 PM
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Well if you plan on just cruising around the city with limited highway driving and mileage is of little concern the 3.73's get my vote.
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Old 04-10-2007, 12:36 PM
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Did a search on the topic and there definitely are alot of opinions, 3:55 and 3:73 do seem to be popular choices. I think I might go with the 3:55's as I might be doing some engine upgrades down the road. Thanks to everyone for the input !
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