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Re: [GMCnet] Power Drive [message #86656 is a reply to message #86649]

Mon, 31 May 2010 01:22

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma:

Senior Member

Chris,

I missed one of your comments; according to Caspro the 3.21 and the Power
Drive results in a final drive ratio of 3.66 to 1

http://www.casprogmc.net/3.21FinalDrive.html

Jim K has a chart on his website noting that at 65 mph the rpm difference
between a stock 3.07 and 3.66 ratio is 485rpm:

http://www.appliedgmc.com/level.itml/icOid/482

Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426

-----Original Message-----
From: Chris Choffat

I have both. power drive and 3.21.

I don't have a tach, but the rpm's are definitely higher. A bit too high for
my taste, but I haven't really spent any serious road time in my coach, so
too early to tell. I'm also used to an overdrive tranny in my truck.

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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[Message index]

		[GMCnet] Power Drive By: USAussie on Sun, 30 May 2010 16:33
		Re: [GMCnet] Power Drive By: Mr ERFisher on Sun, 30 May 2010 16:44
		Re: [GMCnet] Power Drive By: USAussie on Sun, 30 May 2010 16:56
		Re: [GMCnet] Power Drive By: USAussie on Sun, 30 May 2010 17:11
		Re: [GMCnet] Power Drive By: Rick Williams on Sun, 30 May 2010 17:44
		Re: [GMCnet] Power Drive By: Kingsley Coach on Sun, 30 May 2010 18:09
		Re: [GMCnet] Power Drive By: Ken Henderson on Sun, 30 May 2010 18:19
		Re: [GMCnet] Power Drive By: Chr$ on Sun, 30 May 2010 18:27
		Re: [GMCnet] Power Drive By: USAussie on Mon, 31 May 2010 01:08
		Re: [GMCnet] Power Drive By: USAussie on Mon, 31 May 2010 01:22
		Re: [GMCnet] Power Drive By: Bill Massey on Sun, 30 May 2010 18:37
		Re: [GMCnet] Power Drive By: Dan Borlase on Mon, 31 May 2010 11:47
		Re: [GMCnet] Power Drive By: Larry on Mon, 31 May 2010 12:49
		Re: [GMCnet] Power Drive By: zhagrieb on Mon, 31 May 2010 15:09
		Re: [GMCnet] Power Drive By: jimk on Mon, 31 May 2010 15:40
		Re: [GMCnet] Power Drive By: RF_Burns on Mon, 31 May 2010 16:01
		Re: [GMCnet] Power Drive By: Mr ERFisher on Mon, 31 May 2010 16:07
		Re: [GMCnet] Power Drive By: jimk on Mon, 31 May 2010 18:54
		Re: [GMCnet] Power Drive By: mike miller on Mon, 31 May 2010 21:25
		Re: [GMCnet] Power Drive By: USAussie on Mon, 31 May 2010 22:14
		Re: [GMCnet] Power Drive By: Chr$ on Mon, 31 May 2010 23:13
		Re: [GMCnet] Power Drive By: BobDunahugh on Sun, 17 December 2017 10:03
		Re: [GMCnet] Power Drive By: BobDunahugh on Tue, 19 December 2017 09:08
		Re: [GMCnet] Power Drive By: NextGenGMC on Wed, 20 December 2017 01:46
		Re: [GMCnet] Power Drive By: zhagrieb on Sun, 17 December 2017 13:19
		Re: [GMCnet] Power Drive By: powwerjon on Sun, 17 December 2017 15:19
		Re: [GMCnet] Power Drive By: James Hupy on Tue, 19 December 2017 17:58
		Re: [GMCnet] Power Drive By: Kingsley Coach on Wed, 20 December 2017 11:43
		Re: [GMCnet] Power Drive By: RF_Burns on Wed, 20 December 2017 06:19
		Re: [GMCnet] Power Drive By: Matt Colie on Wed, 20 December 2017 07:29

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