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Welcome to the 3500HD.com forum created October 2009

Author Topic: HISTORY OF GM 3500HD BY YEAR?  (Read 8959 times)

someotherguy

  • 3500HD Hero
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  • Posts: 915
  • Age: 48
  • Location: Texas
Re: How about a 3500HD.com section "history of the GM 3500HD by year"?
« Reply #15 on: June 16, 2011, 09:04:56 AM »
The 5.7 would almost surely be 4 bolt main, as 1 tons tended to get as well.  I'd figure like most heavy duty engines it was probably slightly down on compression, given up in sake of longevity under heavy use.  At any rate, the SAE paper specs the 5.7 as 190 HP @ 4,000 RPM / 300lb-ft @ 2,400 RPM...and the 7.4 as 230 HP @ 3,600 RPM / 385lb-ft @ 1,600 RPM.

Richard
06 Silverado ISS / 06 Silverado SS / 06 300C SRT8

454-3500-hd

  • One Ton Driver
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  • Posts: 89
  • Age: 28
  • Location: maryland
Re: How about a 3500HD.com section "history of the GM 3500HD by year"?
« Reply #16 on: June 16, 2011, 12:57:24 PM »
385 ft lbs @ 1600rpm. Good ol big block. I wonder why they st op offering them with rockwells, maybe the cost? I know the rockwells were not cheap and commanly used in military orders, at least that's what I've been told from my truck rear mechanic who is also the shop owner, he claims that he had military service contracts. Also from a retired gm engineer, who's brain is hard to pick but he let's up on some info from time to time.

I would say to let Richard suggest how to set up the child board, he is the brains of this operation! We should keep posting in this topic for a while, then after we have gather as much info as possible (Richard ;D your doing a good job) then incorporate it, such as have the first topic in that child board a "intro" a common explanation the 3500HD . Then the next topic could be the year 1991 we could list all the specs about the 91 HD. Then 1992 and so on, we could list the changes gm made to the HD. How does that sound?

Eric
My fleet,
91-3500hd-454
Ms660-magnum stihl
Modded-288XP husqvarna
Modded-homelite super 2

someotherguy

  • 3500HD Hero
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  • Age: 48
  • Location: Texas
Re: How about a 3500HD.com section "history of the GM 3500HD by year"?
« Reply #17 on: June 16, 2011, 01:09:16 PM »
The change from Rockwell to Dana was probably a simple economics issue; they already had a partnership with Dana for many other items - it may be that the model 80 didn't exist in time for first production but they were able to bring it to market soon afterwards.  That's really a guess, though.  It seems they rushed to production on 3500HD's for 1991 after the success of the all-new 1990 1 ton cab & chassis models, and tried to use as many common components as they could as they were already proven - only upgrading or coming up with new pieces as needed to meet/exceed the design goals.

Richard
06 Silverado ISS / 06 Silverado SS / 06 300C SRT8

454-3500-hd

  • One Ton Driver
  • **
  • Posts: 89
  • Age: 28
  • Location: maryland
Re: How about a 3500HD.com section "history of the GM 3500HD by year"?
« Reply #18 on: June 16, 2011, 01:43:27 PM »
That makes perfect sense. was the 6.5 td the only desiel they offered in the 3500HD?
My fleet,
91-3500hd-454
Ms660-magnum stihl
Modded-288XP husqvarna
Modded-homelite super 2

GM Guy

  • 3500HD Driver
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  • Posts: 233
  • Age: 28
  • Location: NW. KS to S. ID
  • manual transmission 2wd enthusiast
Re: How about a 3500HD.com section "history of the GM 3500HD by year"?
« Reply #19 on: October 02, 2011, 12:08:59 AM »
I figured I might chime in on this. the 6.5L HDs never did get the bumper with the nostrils. the reason for the nostrils it to get more air to the radiator. the filler panel does just this on the HDs, so no need for nostril bumpers.

also, the only difference I can find is the 350s in the HDs got a 6 qt oil pan, rather than the 5 qt. I believe the 454s also got a bigger pan.

someotherguy

  • 3500HD Hero
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  • Posts: 915
  • Age: 48
  • Location: Texas
Re: How about a 3500HD.com section "history of the GM 3500HD by year"?
« Reply #20 on: January 10, 2012, 05:14:51 PM »
My 1994 3500HD had the bumper with the holes, but being that bumpers get banged up from time to time, it could just have easily been taken from a different truck.



In fact, thinking about it, I can't imagine that the HD would have ever come with a bumper that had the Silverado trim level rub strip attached.  The bumper guards are almost uniquely a Suburban item (though I have seen them on other trucks) so that bumper is likely off a diesel 'Burb.

By the way those diesel bumpers have plastic ducting that accompanies them, though there's no way I could see it adaptable to an HD because of the difference in frame design - that big plate crossmember up front would be in the way.

Richard
« Last Edit: January 10, 2012, 05:16:53 PM by someotherguy »
06 Silverado ISS / 06 Silverado SS / 06 300C SRT8

 


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