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#1 |
Registered User
Join Date: Feb 2009
Location: Wausau, WI
Posts: 975
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how does a 4 speed run behind a 250
thinking about picking up this truck it has a six with a standard trans
and a smooth column the guy doesn't want much for it and i was thinking about getting it but does anyone have a 250 with a 4speed behind it how does it run?
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Smoking Tires Since 1992 1969 c10 AKA SIN 1985 SSWB TRAZER (super short wheel base) |
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#2 |
Senior Member
![]() Join Date: Mar 2005
Location: weatherford,texas
Posts: 1,003
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Re: how does a 4 speed run behind a 250
my '67 had a six cylinder/4 speed. i liked it. still have the 4 speed but upgraded the motor to a 350.. some of these trucks came from the factory 6 cyl./4 speed.
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#3 |
Senior Member
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
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Re: how does a 4 speed run behind a 250
don't know why it would really matter if it was a 3 or 4 speed, the top gear is going to be 1:1 either way. Just no stupid column shifter.
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#4 |
Registered User
Join Date: Feb 2009
Location: Wausau, WI
Posts: 975
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Re: how does a 4 speed run behind a 250
will i have to mod the floor to get the four speed in there?
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Smoking Tires Since 1992 1969 c10 AKA SIN 1985 SSWB TRAZER (super short wheel base) |
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#5 |
Registered User
Join Date: Mar 2009
Location: rotorua/new zealand
Posts: 161
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Re: how does a 4 speed run behind a 250
my 69 has 250/4spd and 4.11 diff gears and i drive it to work everyday and i'm happy with it.never use first gear and will probably change the diff gears soon to keep the revs down abit.did a 450 mile trip in it a few weekends ago and found the petrol mileage was similar to the same trip in my 69 350/2spd auto pontiac lemans convert.have decided to keep the truck i6 cause everybody else over here puts a v8 in them and this truck is cool as it is.have a clifford inlet manifold and 350 holley to put on it and will make my own headers and dual exhaust.
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#6 |
Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: how does a 4 speed run behind a 250
Is it a bulldog 4spd or a regukar 4spd? In a bulldog, 2nd,3rd,and 4th are the same ratios as 1st,2nd and 3rd in a 3spd. 1st gear is just very low for pulling and mostly used for a really slow moving speed for farm use.
If it's a regular 4spd, like a Muncie or Saginaw, I would say to get it. The final drive gear is still 1:1 like the 3spd, but with closer gear splits.
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#7 |
Registered User
Join Date: Nov 2008
Location: Carmel, IN
Posts: 187
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Re: how does a 4 speed run behind a 250
Inline 6s are inherently balanced. It is probably the best cylinder arrangement you can have in an engine. It makes plenty of power, if that is your concern. I love inline 6s, I am collecting a car of each type, I have a 292 chevy, 4.0 jeep, I need toyota, a bmw and a ford.
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#8 | |
Senior Member
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
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Re: how does a 4 speed run behind a 250
Quote:
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#9 |
Watch out for your cornhole !
![]() Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: how does a 4 speed run behind a 250
You're gonna need a high hump for a truck 4 speed.
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I'm on the Instagram- @Gearhead_Kevin |
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#10 |
Registered User
![]() Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
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Re: how does a 4 speed run behind a 250
If you're gonna have a 6, I think a 4 speed is the only way to go. I had a 69 4x4 once with a 292 4spd. I think the 6 needs all the help it can get. Mine got crappy milage and NO power to boot. I can't imagine anyone wanting a 6 but to each his own. No offense to all the 6 lovers out there!!
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Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299 |
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#11 | |
HickTown
Join Date: Apr 2009
Location: ANDOVER, Kansas
Posts: 355
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Re: how does a 4 speed run behind a 250
Quote:
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1993 Ford Mustang Vert w/ 2.3 1969 Chevy C/10 w/350 1968 Chevy C-20 w/250 1976 Dodge Aspen W/ 225 2000 Toyota Tundra w/4.7 1987 Dodge Ram D-100 w/360 255/70-15 ___________ (oo)══╬══(oo) ‾‾‾‾‾‾‾‾‾‾‾ |
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#12 |
Old Duffer
![]() Join Date: Mar 2003
Location: Maine
Posts: 1,821
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Re: how does a 4 speed run behind a 250
I have to jump in here...I'm running a 292 4bbl with a WC T5 and love it. Plenty of torque, good gear ratios, and reasonable mileage for the weight of the truck. I don't agree that the I6's have "no power", I have all the power I need for the truck's intended purpose.
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'68 Short C20 Flatbed Dually w/ 292 4bbl, Langdon cast headers, and WC T5 trans. '81 G10 Shorty Van "Good judgement comes from experience, and a lot of that comes from bad judgement." Will Rogers "Under promise, then over achieve." |
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#13 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,201
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Re: how does a 4 speed run behind a 250
We've had a couple and they're great.
Incidently, our '69 GMC would routinely outrun a fella at work who had a V8 truck: 292 L6 punched to 305, true duals, 3x2 Rochesters with a Pontiac progressive linkage, Hurst shifted 3.11 low gear Saginaw 4 speed with 3.73 gears... ![]() Just about every time he'd make a tweak, we'd make a comparable change and run 'em off. He never did beat us across the intersection - which frustrated him to no end cause he knew ours was a 6. 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/ Last edited by Keith Seymore; 04-09-2010 at 01:15 PM. |
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#14 |
Six in a row makes it go...
![]() Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: how does a 4 speed run behind a 250
I have a 250 with a Richmond 5-speed behind it and another truck with a 292 and SM420 4-speed. I like 'em.
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67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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#15 |
Registered User
![]() Join Date: Nov 2009
Location: San Antonio TX
Posts: 251
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Re: how does a 4 speed run behind a 250
I'm running an I6 with a 4speed overdrive. I love the pur they make at 600rpm's
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#16 |
Registered User
Join Date: Nov 2006
Location: Springfield/Kansas City
Posts: 1,842
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Re: how does a 4 speed run behind a 250
I run the 250 with the four on the floor. Check my build thread for more info, I would bet money it out runs most 350's out there. I love it!
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#17 |
Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: how does a 4 speed run behind a 250
My old '67 swb has a stock 4 speed behind a '70 i-6.
It is not running great, carb problem I think, but it will make the rear tires spin it I want when taking off. I am not sure of the rear end gearing though since I have never taken the cover off and checked, probably 3.73. Danny
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'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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#18 |
Registered User
Join Date: Jun 2005
Location: Midlothian, VA
Posts: 148
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Re: how does a 4 speed run behind a 250
Don't forget the 3 speed overdrives! The NP833 (MY6 code) from the 80's is a direct replacement for the Saginaw 3 speed. You get a 3.09 first gear and 0.76 overdrive (fourth). Best move I've done with mine.
You will need to cut a hole for the shifter of course. Good Luck.
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