Rear End Ratio Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Already Gone** · 09-24-2011, 09:47 PM

I'm looking at a 68 GMC Burb 4x2 with a 327 and a Turbo 400 trans. My questions are, wouldn't a 327 come with a Turbo 350 trans and does anyone have an idea what rear end ratio this Burb original Burb would have?
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Keith Seymore · 09-24-2011, 10:07 PM

The GM Heritage Center archive did not have information on a "68 Suburban, but they did have an information kit on a '69 - which indicates a 3.07 axle base; 3.73 or 4.11 optional.

http://www.gmheritagecenter.com/gm-h...t-Suburban.pdf

(page 18, and page 33)

It did not specify between a TH350 or TH400, only that it was a TurboHydramatic trans.

K

Livrat · 09-24-2011, 10:42 PM

If there is no ratio listed in the SPID it is normally a 3:07.
T350's first arrived 1969

**Already Gone** · 09-24-2011, 11:53 PM

Thanks for the info guys.
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09-24-2011, 09:47 PM	#1
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,144	Rear End Ratio Question I'm looking at a 68 GMC Burb 4x2 with a 327 and a Turbo 400 trans. My questions are, wouldn't a 327 come with a Turbo 350 trans and does anyone have an idea what rear end ratio this Burb original Burb would have? Posted via Mobile Device __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

09-24-2011, 10:07 PM	#2
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,228	Re: Rear End Ratio Question The GM Heritage Center archive did not have information on a "68 Suburban, but they did have an information kit on a '69 - which indicates a 3.07 axle base; 3.73 or 4.11 optional. http://www.gmheritagecenter.com/gm-h...t-Suburban.pdf (page 18, and page 33) It did not specify between a TH350 or TH400, only that it was a TurboHydramatic trans. K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

09-24-2011, 10:42 PM	#3
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	Re: Rear End Ratio Question If there is no ratio listed in the SPID it is normally a 3:07. T350's first arrived 1969

09-24-2011, 11:53 PM	#4
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,144	Re: Rear End Ratio Question Thanks for the info guys. Posted via Mobile Device __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021



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