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73 5 speed conversion mpg

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Old Nov 30, 2006 | 02:47 AM
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Default 73 5 speed conversion mpg

Has anyone put a 5 speed in a 73 or thereabouts with a 350? Did it help the mpg?
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Old Nov 30, 2006 | 07:29 AM
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If it is a richmond 5 speed with a one to one 5th gear ratio it won't improve gas mileage. I installed a T5 5 speed with a .68 to one 5th gear ratio and I went from 16 MPG to 20+ MPG highway. I'm running a 3:55 rear diff. Hope this helps.
Bernie
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Old Nov 30, 2006 | 07:35 AM
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i have got a richmond 6 speed with 0.62 overdrive & 3.70 rearend on my L46....get 20+ mpg also. Priceless to see the looks on others faces thinking that the older cars can't cruise at 80+mph due to typical gearing ratios we use to have
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Old Nov 30, 2006 | 07:40 AM
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I'm running a T56 6 speed and there is a big improvement in economy. if only I could stop flooring it through the gears all the time!

Graeme
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Old Nov 30, 2006 | 10:09 AM
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Next weekend I am replacing my TH400 with the Keisler 5spd. I would be extremely surprised if I did NOT get an improvement in gas mileage.
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Old Nov 30, 2006 | 10:10 AM
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Did you start with a 4 speed or auto?
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Old Nov 30, 2006 | 12:15 PM
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Mine was a TH350 auto.
Bernie
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Old Nov 30, 2006 | 02:04 PM
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Installed a Keisler TKO-600. Took my MPG from 15 ro 20. As others have stated, it would be better if I kept my foot out of it but what fun is that?!
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Old Nov 30, 2006 | 04:51 PM
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Default Cost of conversion

I was wondering what the total cost was for the 5 sp conversions. It seems like everyone that has done it was pleased with the results.

Leo
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Old Nov 30, 2006 | 07:11 PM
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Originally Posted by Leo001
I was wondering what the total cost was for the 5 sp conversions. It seems like everyone that has done it was pleased with the results.

Leo
The Keisler unit I have was 3195+125 shipping (about 8 months ago). including a new clutch.
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