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**jocko** · 09-08-2013, 01:08 PM

back to the original question - no, what you are hearing is normal. truck WILL go fast, it's just not geared to go fast at a reasonable rpm. As mentioned above, what you choose should be dependent on what you want to do with the truck. From a mathematical standpoint, on any given engine, the top speed you CAN achieve will be higher with a lower numerical rear end ratio (i.e. higher gear). And, yes, it will be slower off the line with that lower numerical ratio compared to a higher one also - but it is not physically possible to achieve the same TOP speed with different rear end ratios. (i.e. just because you can get to 70 in your 3.08 AND your 3.73 setups only means you are not at the top speed for the engine, yet, but you are closer to it with the 3.73 while the 3.08 has a ways to go before the motor is wound out at its top rpm, that's all)

09-08-2013, 01:08 PM	#20
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,998	Re: Three speed Saginaw top speed ? back to the original question - no, what you are hearing is normal. truck WILL go fast, it's just not geared to go fast at a reasonable rpm. As mentioned above, what you choose should be dependent on what you want to do with the truck. From a mathematical standpoint, on any given engine, the top speed you CAN achieve will be higher with a lower numerical rear end ratio (i.e. higher gear). And, yes, it will be slower off the line with that lower numerical ratio compared to a higher one also - but it is not physically possible to achieve the same TOP speed with different rear end ratios. (i.e. just because you can get to 70 in your 3.08 AND your 3.73 setups only means you are not at the top speed for the engine, yet, but you are closer to it with the 3.73 while the 3.08 has a ways to go before the motor is wound out at its top rpm, that's all)