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 6 cyl std differential with a powerflite

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Arnie1964
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PostSubject: 6 cyl std differential with a powerflite   Tue Jul 09, 2013 6:30 am

I know the car I am working on now was a 6 cyl standard shift car. They put a V8 with a powerflite in it. I am going to put the car on the lift this weekend to check the gear ratio in the differential. I noticed that the car shifts into drive fine but it seem like she wants have another gear to shift into. You know the feeling. It's not quite like you have a car in second and did not shift to third but feels like someplace in between. Thinking maybe the rear is geared to low for a two speed powerflite. Anyone ever had this experience?

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PostSubject: Re: 6 cyl std differential with a powerflite   Tue Jul 09, 2013 9:19 am

She most likely does want another gear. The gear ratio in a 6 cyl car is a lot higher than a V8. That's why it sounds like its reving higher.

Either a gear change or 3 speed Trans will fix that problem.
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PostSubject: Re: 6 cyl std differential with a powerflite   Tue Jul 09, 2013 9:22 am

I am thinking the same thing Joe. When you take you foot off the gas she has a lot of back pressure like it is in a gear other than high. Bet she woulf sound great with glass packs though. Twisted Evil 

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PostSubject: Re: 6 cyl std differential with a powerflite   Tue Jul 09, 2013 12:25 pm

this is a very common problem with 6 cylinder to v8 conversions, no one ever bothers to change the gears in the rearend. Very Happy

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PostSubject: Re: 6 cyl std differential with a powerflite   Tue Jul 09, 2013 1:35 pm

Gearing is too high for the auto trans. Best to install a set of 3:00 or similar for economy.

---John

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6 cyl std differential with a powerflite

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