| [GMCnet] Final Drive Recommendation [message #177311] |
Thu, 19 July 2012 15:42  |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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Senior Member |
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> I think you are talking about a modification referred to as a "Power Drive". IIRC Manny is now the 'man' to talk to about it.
We have a Manny Tranny with the 3.5 power drive mod. If you have
to do tranny work anyway, it's a great and very cost effective way to go.
You don't have to change the speedo gears and it's a very solid piece
of engineering. There's been debate here over chain vs final drive
and which is better that I won't bother to rehash. All I can
say is we're happy with our chain drive mod and it added a
lot of pep to our coach. As others have pointed out though, higher
revs = more noise at freeway speeds no matter how you slice it.
Karen
1973 23'
1975 26'
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Karen
1975 26'
San Jose, CA
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| Re: [GMCnet] Final Drive Recommendation [message #177331 is a reply to message #177311] |
Thu, 19 July 2012 19:40  |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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I have the 3.50 Caspro Power Chain drive with a 3.21 final to equal
out to a 3.67 ratio. Manny bought out Caspro's Power Drive operation
a few years ago which is what he sells today. This ratio works very
well for us as the coach is a 31' stretch by Buskirk and weighs much
more that a regular 26' coach. No I haven't had it weighed but that
will happen this fall. I am thinking of going to a 3.42 final to up
my final to the 3.85 range. I had no problems out west this year with
the mountains but the extra gearing might help in the future might help.
JR Wright
GMC Great Laker MHC
GMC Eastern States
GMCMHI
78 Buskirk 30' Stretch
1975 Avion (Under Reconstruction)
Michigan
>> I think you are talking about a modification referred to as a
>> "Power Drive". IIRC Manny is now the 'man' to talk to about it.
>
> We have a Manny Tranny with the 3.5 power drive mod. If you have
> to do tranny work anyway, it's a great and very cost effective way
> to go.
> You don't have to change the speedo gears and it's a very solid piece
> of engineering. There's been debate here over chain vs final drive
> and which is better that I won't bother to rehash. All I can
> say is we're happy with our chain drive mod and it added a
> lot of pep to our coach. As others have pointed out though, higher
> revs = more noise at freeway speeds no matter how you slice it.
>
> Karen
> 1973 23'
> 1975 26'
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GMCnet mailing list
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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