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11-08-2007, 05:35 PM
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#1 |
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67-72 Addicted
Join Date: Oct 2007
Location: Guelph Ontario
Posts: 256
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4 speed manual?
I got a 1968 c20, its got a 250ci in it with a 4 speed on the floor. I want to know what the 4 speed is, I've been told its a muncie but im not sure. Im 99% its not a granny-low. The sheft pattern is
1 3 2 4 R Also, I's like to know what rear end is in it, its an 8 lug pattern. Last edited by koolky; 11-08-2007 at 05:55 PM. |
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11-08-2007, 06:42 PM
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#2 |
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Registered User
Join Date: Mar 2006
Location: USA
Posts: 21,020
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Re: 4 speed manual?
It's an SM465 most likely..The 3spd with granny low first gear..making it a 4spd.The rear axle is probably a Eaton HO52
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11-08-2007, 07:48 PM
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#3 |
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Senior Member
Join Date: Dec 2003
Location: Kingsport TN
Posts: 4,641
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Re: 4 speed manual?
My 68 had an eton rear with an sm465 trans and rockwell trancfer case.
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Earl 68 2500 4x4 GMC Burb |
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11-08-2007, 08:29 PM
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#4 |
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Designated Grumpy Old Man
 
Join Date: Oct 2001
Location: arlington, washington usa
Posts: 3,092
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Re: 4 speed manual?
Going to move this to the pickup board.
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Never let the truth get in the way of a good story 71 Chev 1/2 ton 4X4 LWB Fleetside SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=361222 http://www.youtube.com/watch?v=1LgREwtDfaA 68 Chev 1 ton flat bed http://www.youtube.com/watch?v=0bO8szzlD4A 56 Chev Handyman Wagon http://www.youtube.com/watch?v=9y-6ddpBTkM http://www.youtube.com/watch?v=lbLzZ7zY8wA 56 Chev Belair http://67-72chevytrucks.com/vboard/s...d.php?t=410667 http://www.youtube.com/watch?v=xoW0Ei7ZNIg |
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11-08-2007, 10:06 PM
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#5 |
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Registered User
Join Date: Apr 2007
Location: Kalamazoo, Michigan, USA
Posts: 538
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Re: 4 speed manual?
nevermind
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1970 K20, 350--- SOLD 05 silverado extended cab short box- duramax Jeep wrangler unlimited Last edited by Ace in the hole; 11-08-2007 at 10:11 PM. Reason: question answered |
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11-08-2007, 10:36 PM
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#6 |
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BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,825
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Re: 4 speed manual?
You would know if its granny low...go 5 feet then you have to shift.
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11-08-2007, 10:49 PM
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#7 |
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I'm a poor spectator
Join Date: Aug 2006
Location: San Antonio, Tx
Posts: 2,287
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Re: 4 speed manual?
I thought those years had the sm420??
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2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig  1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!!  1979 Ford F150 4x4 SWB Built Ford Tough!!!  1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!! |
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11-09-2007, 04:14 PM
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#8 |
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Registered User
Join Date: Mar 2006
Location: USA
Posts: 21,020
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Re: 4 speed manual?
67s and maybe some 68s had the SM420..this is a 465 though since the shift pattern is :
1 3 2 4 R SM420 pattern has reverse on the left next to first |
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11-09-2007, 08:00 PM
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#9 |
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chrome makes it go FASTER!
Join Date: Feb 2007
Location: Cleveland Tennessee
Posts: 2,884
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Re: 4 speed manual?
If it's like my granny tranny it's 0-6 mph in half a second. 0-60mph in half an hour.
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She can't cook and she won't clean. But she looks good in a skirt and she brings me beer. She can stay for now. EDIT:: But she left me anyway, So forget her. 1962 GMC Stepside V6 4 speed My rolling resto thread http://67-72chevytrucks.com/vboard/s...d.php?t=324226 My old farm truck http://67-72chevytrucks.com/vboard/s...=1#post3465005 |
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11-09-2007, 08:10 PM
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#10 | |
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I'm a poor spectator
Join Date: Aug 2006
Location: San Antonio, Tx
Posts: 2,287
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Re: 4 speed manual?
Quote:
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2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! 1979 Ford F150 4x4 SWB Built Ford Tough!!! 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!! |
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11-09-2007, 08:36 PM
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#11 |
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The Man The Myth The Mystery
Join Date: Jul 2007
Location: Des Moines, IA
Posts: 114
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Re: 4 speed manual?
Pardon me as I have been on edge lately. But we cant tell you anything when you post a picture of your truck. If you want serious no BS help post a pic of your Tranny and a pic of your Rear Diff. Point being i have a 71 with 4 on floor and it is a Muncie M-21. Not a stock tranny for a 71 pickup now is it so help us help you. muncie shift pattern
R 1-3 ... 2-4 Last edited by scooter122983; 11-09-2007 at 08:40 PM. |
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11-09-2007, 08:39 PM
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#12 | |
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I'm a poor spectator
Join Date: Aug 2006
Location: San Antonio, Tx
Posts: 2,287
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Re: 4 speed manual?
Quote:
Good point.
__________________
2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! 1979 Ford F150 4x4 SWB Built Ford Tough!!! 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!! |
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11-09-2007, 09:18 PM
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#13 |
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Registered User
Join Date: Oct 2007
Location: Garageless, Missouri
Posts: 408
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Re: 4 speed manual?
You are not only on the edge but correct. Who knows what the earlier muther truckers have done to make it work for them. Pics of the body, label, and markings make it at least identifiable. The gears inside may have changed through the years but the outside has a particular pressence............. I do remember a granny with a hot 283 in front of her that would rattle your head with the 4 inch outlet pipes in a 66.
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R.I.P ESLL Even as the body dies the spirit lives on in the people you touched |
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11-10-2007, 09:54 PM
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#14 |
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67-72 Addicted
Join Date: Oct 2007
Location: Guelph Ontario
Posts: 256
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Re: 4 speed manual?
Sorry that i dont ahve a picture jtrux, but curently my truck is sitting in a field, its kida far away too. Everone else, thanks for the replies, ive definetly learned soemthing. and as far as my rear end goes i have a picture here, should help in telling if its an eaton.
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11-10-2007, 10:16 PM
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#15 |
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Registered User
Join Date: Mar 2006
Location: USA
Posts: 21,020
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Re: 4 speed manual?
Yep,that's an Eaton.
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11-10-2007, 10:23 PM
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#16 |
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67-72 Addicted
Join Date: Oct 2007
Location: Guelph Ontario
Posts: 256
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Re: 4 speed manual?
Thanks, waht are the chances its a posi, I cant realy get to jacking it up for a while.
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11-10-2007, 10:25 PM
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#17 |
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Registered User
Join Date: Mar 2006
Location: USA
Posts: 21,020
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Re: 4 speed manual?
Don't know about posi but some of them had no-spins in them.
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11-11-2007, 09:05 PM
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#18 |
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The Man The Myth The Mystery
Join Date: Jul 2007
Location: Des Moines, IA
Posts: 114
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Re: 4 speed manual?
now how about that tranny.
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11-11-2007, 11:17 PM
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#19 |
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I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: 4 speed manual?
It could be an SM-420 or a New Process NP-435-GA 4 speed in 1967. The NP-435-GA had the shift pattern you described. The later SM-465 also had that pattern.
The SM-420 has a large bulge on the passenger side, and a driver's side PTO plate. It has all the way to the left and down reverse.   The NP-435-GA has a large aluminum top plate, and has a passenger side PTO plate. It has all the way to the right and down reverse.   The SM-465 has PTO plates on both sides. It has all the way to the right and down reverse.   I always crawl under them and look at the PTO plate. That is the quickest way to ID them.
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! Last edited by 67_C-30; 11-12-2007 at 01:11 AM. |
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11-12-2007, 06:26 AM
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#20 |
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Registered User
Join Date: Apr 2002
Location: New Carlisle, Ohio,USA
Posts: 1,404
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Re: 4 speed manual?
Here's a pic that might help ya figure out which one you have?
  
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LIFE AIN'T EASY WHEN YER FAT AND GREASY! GMC= Got More Class!  1970 GMC LWB, Fleetside, 350/4spd, Flowmaster "40's", 2002 GMC 16" Rallies, cowl hood,and added a bunch of options that weren't there when I started. 
Last edited by OhioDan; 11-12-2007 at 06:26 AM. |
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11-12-2007, 11:15 AM
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#21 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,862
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Re: 4 speed manual?
No posi.There was a locker called the "No Spin".Your truck`s pretty intact.Is the option sheet there or ledgible?It would be listed,if from factory.Also,there miht still be a label on the back wall in the corner behind the passenger side.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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11-12-2007, 11:24 AM
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#22 |
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Registered User
Join Date: Dec 1999
Location: Northwest NJ
Posts: 746
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Re: 4 speed manual?
SM420 has reverse next to second. Chris
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