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Re: [GMCnet] Power Drive [message #86655 is a reply to message #86649]

Mon, 31 May 2010 01:08

USAussie

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

Karma:

Senior Member

Chris,

OK, here's what I think I know!

If the final drive cover has eight (8) bolts it is a 3.21 and it has
planetary gears in it.

If the final drive cover has ten (10) bolts it's a 3.07 and it has spur
gears in it.

As far as any other ratios goes I found this:

http://www.gmcmhphotos.com/photos/data/5124/overall_drive_ratios1.pdf

I thank Ken H. for putting this together!

Mr. Erf aren't you proud of me; I found this on your website WITHOUT you
having to tell me to go look there! ;-)

I think I am safe in saying any final drive gear ratios other than 2.73,
3.07 and 3.21 are after market.

I don't know but would like to know, if the lower ratio after market gears
will fit in the 3.21 final drive.

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

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

I'm told 3.21's don't have this vent and it is a 3.42. Everyone who looks
at the photo's say it is a 3.21. go figure. It came with a '67 eldo switch
pitch.

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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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