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Re: New Manny Tranny on hills [message #195320 is a reply to message #195317]

Wed, 09 January 2013 20:45

mike miller

Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon

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Senior Member

gbarrow wrote on Wed, 09 January 2013 18:03

...
At what speed/rpm at WOT on a long uphill grade does "lugging" occur and become detrimental to the engine or transmission? Or: Given the ~2700 rpm most efficient power point for the 455, what is the lowest "safe" rpm for the engine/tranny under heavy load?
...

I also would like to know what the experts have to say. I downshift manually to keep the RPM's up. But I am using a 403 with stock final drive.

I would like numbers for both the 455 and 403 motors.

Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo' http://m000035.blogspot.com

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[Message index]

		New Manny Tranny on hills By: gbarrow2 on Wed, 09 January 2013 20:03
		Re: New Manny Tranny on hills By: JohnL455 on Wed, 09 January 2013 20:20
		Re: New Manny Tranny on hills By: John Sharpe on Wed, 09 January 2013 20:54
		Re: New Manny Tranny on hills By: mike miller on Wed, 09 January 2013 20:45
		Re: New Manny Tranny on hills By: robertmcw on Wed, 09 January 2013 20:49
		Re: New Manny Tranny on hills By: George Beckman on Thu, 10 January 2013 00:23
		Re: [GMCnet] New Manny Tranny on hills By: James Hupy on Wed, 09 January 2013 20:50
		Re: New Manny Tranny on hills By: Matt Colie on Thu, 10 January 2013 09:36
		Re: New Manny Tranny on hills By: Darryl on Thu, 10 January 2013 11:15
		Re: [GMCnet] New Manny Tranny on hills By: James Hupy on Thu, 10 January 2013 14:48
		Re: [GMCnet] New Manny Tranny on hills By: A Hamilto on Thu, 10 January 2013 14:53
		Re: [GMCnet] New Manny Tranny on hills By: James Hupy on Thu, 10 January 2013 15:14
		Re: [GMCnet] New Manny Tranny on hills By: USAussie on Thu, 10 January 2013 18:15
		Re: New Manny Tranny on hills By: Darryl on Thu, 10 January 2013 15:14
		Re: [GMCnet] New Manny Tranny on hills By: Mr ERFisher on Thu, 10 January 2013 16:18
		Re: [GMCnet] New Manny Tranny on hills By: k2gkk on Thu, 10 January 2013 16:27
		Re: New Manny Tranny on hills By: Matt Colie on Thu, 10 January 2013 19:26

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