better gears for more purpose use but power to.

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Ok i have a 1966 plymouth Satellite with a 600 hp motor i changed over to a A-833 trans with a 8 3/4 rear with a 489 chunk & 391 gears yes its a posi when i am crusing in forth and hit third hard it hits the rev limiter fast i want more rpm would 3:55 be better or 3:23 any ideas.!

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Two things, what do you set the rev limiter at? 2nd, is it spinning the tires when you hit it in third gear? Mine does,(727 with a loose converter) if I'm not careful on the loud peddle application 4.10 gears, 13.5x30x15 M/T ET Streets I have my rev limiter set at 8000 RPM, I shift it at or close to 7300 RPM, it runs a 134 MPH in the 1/4 mile crossing the finish line at or close to 7000 RPM

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You say that you want more rpm, I presume that you mean more usable rpm between your cruise speed and the rev limiter.

Gear choice when balancing crusing against best performance/fun factor, is usally a compromise and boils down to an individuals preference. Do the math as Mr.P suggests, or use an on line calculator to see how the rpm will change with different axle ratios. Also, if the concern is simply bumping into the rev limiter, maybe move it up a few hundred rpm. I would think that you would be shifting around 6000 anyways, and a 600 hp motor should have the internals to safely rev past that.

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Your bigger problem is a lack of TRACTION, you could switch to a 2.76 gear change the rev limiter to 8k rpm and if it's spinning you are still going to be on the rev limiter pretty quickly.

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Your bigger problem is a lack of TRACTION, you could switch to a 2.76 gear change the rev limiter to 8k rpm and if it's spinning you are still going to be on the rev limiter pretty quickly.

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That's what I was thinking too. It's not the gear's fault that you're spinning and hitting the rev limiter. Either up the traction or ease up on the pedal. With a 600hp engine, 2.76 rear gears and crappy street tires you'll still be blowing them away and bouncing off the rev limiter.

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Yes it is busting the tires loose so i am going to do something cause i am just wasting my time as it is,

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Your bigger problem is a lack of TRACTION, you could switch to a 2.76 gear change the rev limiter to 8k rpm and if it's spinning you are still going to be on the rev limiter pretty quickly.

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That's what I was thinking too. It's not the gear's fault that you're spinning and hitting the rev limiter. Either up the traction or ease up on the pedal. With a 600hp engine, 2.76 rear gears and crappy street tires you'll still be blowing them away and bouncing off the rev limiter.

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Yes it is busting the tires loose so i am going to do something cause i am just wasting my time as it is,

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Your bigger problem is a lack of TRACTION, you could switch to a 2.76 gear change the rev limiter to 8k rpm and if it's spinning you are still going to be on the rev limiter pretty quickly.

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That's what I was thinking too. It's not the gear's fault that you're spinning and hitting the rev limiter. Either up the traction or ease up on the pedal. With a 600hp engine, 2.76 rear gears and crappy street tires you'll still be blowing them away and bouncing off the rev limiter.

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On the track or on the street? Any car with that kind of power is going to blow away tires on the street no matter what.

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you need a wide/sticky tire to gain traction.