| Re: Final Drive Options and Recommendations [message #220338 is a reply to message #220336] |
Thu, 29 August 2013 12:44   |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma:
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Senior Member |
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| lw8000 wrote on Thu, 29 August 2013 12:37 |
What were the issues when towing with the 3.07, exactly? Frequent downshifting?
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Yes and generally lack of oomph because the motor is at the bottom of its sweet spot.
I just put a 3.66 behind my 403 and there is a NOTICEABLE difference in pep and power. The motor runs in the middle of the torque curve and is much happier.
I found a 3.21 and added Manny's power drive (different chain sprokets ratios in the tranny) when he was building me a tranny and that is why it is a 3.66. I'd vote for the 3.70 if you're only doing the differential.
That said, if you want to run 85 mph, you might be happier with the 3.50. Our coach, seems to like 65 and that is a comfortable driving speed for me.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
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