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Old 10-16-2016, 12:13 PM   #11
Mark Faul
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Default Re: Gear recommendation

I have heard for years that you go up a ratio or two like you posted. Never understood why, since if you have the optimum rear ratio for your combo, you would now be revved too high with the lower ratio.
In my super stock car, I switched from a 2.52 low gear T350 to a 1.96 powerglide. Neither trans had all the whistles and bells, but were decent pieces. I ran virtually the same.
Going from a T400 to PG, I would've be surprised if you ran quicker just based on the efficiency of the 2 transmissions.
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Old 10-16-2016, 12:57 PM   #12
572nova
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Default Re: Gear recommendation

Maybe it would be worth trying it with the current gear before changing anything. The motor does have lots of torque so maybe with the more efficient 2 speed it might make up any loss of the 1st gear ratio change and not affect trap rpm. One of the other members also mentioned that might be good to start with the current gear and make my own data based on the outcome. Thanks
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