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#1 |
Senior Member
![]() Join Date: Jul 2002
Location: Oak Harbor, WA
Posts: 703
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Transmission question?
Okay....I thought I knew this already....but what transmissions were offered for a factory 1991 K2500 Suburban w/ a 350 engine? I thought only the 4L80-E was offered.....did the TH400 come in them as well? If a 1991 3/4 4x4 has a 16 bolt auto pan....does that mean it was swapped in at some point??? Just trying to narrow down some info on a possible purchase...Thanks in advance!
Pat
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#2 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,169
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Re: Transmission question?
Here ya go:
![]() This is the powertrain chart from the GM Heritage Center archive, for a '91 V3500 Suburban. This is the chart we used to release the various driveline configurations for production. Based on this, it was an automatic overdrive (4l80E), not a TH400. Here's the rest of the information, for all the other options and content, if you are interested. http://www.gmheritagecenter.com/gm-h...t-Suburban.pdf K
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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/ |
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#3 |
Senior Member
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Location: Oak Harbor, WA
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Re: Transmission question?
Thanks!
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#4 | |
Senior Member
Join Date: Aug 2004
Location: Everett, WA
Posts: 2,316
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Re: Transmission question?
V3500 Suburban?
Did GM actually make a 1-ton 'burb; I have seen people claim to have a 1-ton but thought they were incorrect (to put it nicely)? Also, looking at the PDF you linked to, on page 8, it says the 1/2 ton burb had 210hp/300tq and the 3/4 ton burb had 190hp/300tq; is that correct, it doesn't seem to make sence? Also II, it lists the 2 diesel engines as 260tq and 285tq; I thought the diesls were supposed to have more tq??? Quote:
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2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold) |
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#5 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,169
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Re: Transmission question?
Quote:
Regarding hp ratings - yes. Typically the "heavy duty" engines are built for durability rather than overall power. Regarding diesel torque - yes - in general, diesels have more torque than a comparable gas engine, all other things being equal. In this case - not all other things were being equal... ![]() K
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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/ |
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#6 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,169
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Re: Transmission question?
D'oh - I see it now.
![]() Typo on my part - V2500 Suburban. Someone placed the "3" too close to the "2" on my keyboard.... K
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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/ |
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#7 |
Registered User
Join Date: Dec 2010
Location: Dallas, TX
Posts: 160
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Re: Transmission question?
RPO code MXO encompasses all 4 Speed OD transmissions. If it is a 4L80E, it will also have RPO code MT1.
700R4s are 16 bolt pans... Good luck with that one.
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2010 Basalt Black Porsche Cayenne GTS - Daily driver 1991 2500 Suburban, Black - 454/80E tow monster, soon to go under the knife... Again. ![]() 1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac |
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#8 |
Senior Member
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Location: Oak Harbor, WA
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Re: Transmission question?
The owner says it has 17 bolts...so should be the 4L80-E then? (Havent seen it yet)
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#9 | |
Registered User
Join Date: Dec 2010
Location: Dallas, TX
Posts: 160
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Re: Transmission question?
Quote:
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2010 Basalt Black Porsche Cayenne GTS - Daily driver 1991 2500 Suburban, Black - 454/80E tow monster, soon to go under the knife... Again. ![]() 1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac |
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#10 |
Senior Member
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Location: Oak Harbor, WA
Posts: 703
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Re: Transmission question?
Not to muddy the water...but didnt they also make a special order dually 1 ton suburban or was that all dealer installed?
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#11 | |
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Join Date: May 2009
Location: Motor City
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Re: Transmission question?
Quote:
The only ones I'm aware of were homemade. K
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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/ |
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#12 |
Registered User
Join Date: Feb 2012
Location: Wenatchee, Washington
Posts: 92
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Re: Transmission question?
as a general rule of thumb, for most later GM 2500 wilth overdrive, 6 lug wheels 700R4, 8 lug wheels 4L80E. I say most because every now and then they did something different
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#13 |
Senior Member
![]() Join Date: Jul 2002
Location: Oak Harbor, WA
Posts: 703
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Re: Transmission question?
I'll have to research it...but i just came across an article that talked about a dually suburban that was either factory or dealer......
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#14 |
Senior Member
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Location: Oak Harbor, WA
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Re: Transmission question?
I could not find what I was looking at before...guess I was wrong....
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#15 | |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,169
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Re: Transmission question?
Quote:
But not factory. Suburbans were only built at Flint and a dually would not fit through their assembly line process. K
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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/ |
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#16 |
Registered User
Join Date: Jun 2008
Location: Lubbock, TX
Posts: 2,047
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Re: Transmission question?
Forget counting bolts, the 4L80E is very easy to identify - there's a waffle pattern cast into the bellhousing on both sides.
I'd love to find one of these with a blown engine, need a mountain truck to haul the family... |
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#17 |
Registered User
Join Date: Dec 2010
Location: freeburg, illinois
Posts: 885
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Re: Transmission question?
The dually suburban was an aftermarket kit i believe as my dad bought one and told me about it much like.... his 76 vette with an opening back lid just an aftermarket thing companies made and i saw an ad in an old 4wd magazine someone posted on here, you might of been able to purchase it through a dealer and have them install it that's possible because dealers back then probably did more than the money hungry ones now where if you touch one thing warranties are being voided lol but anyways not just home made someone threw on some fenders and a different axle I know It was a kit type deal ill look for the ad
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1987 Chevy V30 - http://67-72chevytrucks.com/vboard/s...d.php?t=573854 1988 IROC-Z Camaro - 305/T5 T-Top 1989 GMC V35 - Marbolo Express http://67-72chevytrucks.com/vboard/s...d.php?t=596850 1991 V2500 Suburban Silverado - Sold 1991 V2500 Suburban Scottsdale - Big Nasty http://67-72chevytrucks.com/vboard/s...d.php?t=497423 2001 Ram 3500 5.9 H.O NV56 EC DRW - Sold 2003 1500 Silverado 2004 Ram 3500 5.9 H.O NV56 CC DRW - Sold 2005 Silverado 2500HD 6.6/ZF6 CC LWB |
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