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#1 |
1961 crewcab
Join Date: Dec 2007
Location: missoula, mt
Posts: 6,164
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5 speed gmc transmission , will it fit?
I was talking to an old salvage yard guy about my gmc 4000 series, he mentioned that if it had a 5 speed that Icould bolt it into my 1/2 ton..
so I checked and it is the np540go14! thats the 5 speed overdrive! I copied some info from the www.6066gmcguy.org/ website on it anyone hear of bolting one of these into a 1/2 ton with a sbc? ************ 5-Speed Transmissions GMC Used New Process, Clark & Spicer 5-Speed Transmissions in the 4000 series & bigger Trucks. The New Process NP-540 series of 5 speed transmissions came in a few different models. The "GL" is Pictured below & the others will look the same. The "GO" was an overdrive model, the other models just had some different gear sets in them for the lower gears, see charts below. The NP-450-GL was mounted behind a 401M in a 1963 4000 model, not stock running gear for that truck, you will note that the trans top cover has a back up light switch, which came out in 1967. This trans will be used in my 1965 GMC 1 ton with the 401M for power. Transmission Specifications GMC Used the follwoing Four & Five Speed transmissions. Manufacturer Transmission 1st 2nd 3rd 4th 5th Rev Oil Capacity General Motors/Muncie SM-465 6.54:1 (this is the one in the truck now) 3.57:1 1.70:1 1.00:1 6.54:1 6 pints New Process 540GO14 6.05:1 this is the 5spd od in my gmc 4000) 3.31:1 1.84:1 1.00:1 0.82:1 6.86:1 10 pints |
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#2 |
Just here to tinker
![]() Join Date: Jun 2008
Location: Holland, MI
Posts: 3,692
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Re: 5 speed gmc transmission , will it fit?
I'm not sure about mounting it but that would be awesome!
__________________
78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(winter unit)https://67-72chevytrucks.com/vboard/...25#post8900725 |
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#3 |
Registered User
Join Date: Jul 2009
Location: broken dreams CT
Posts: 37
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Re: 5 speed gmc transmission , will it fit?
I dont know if it will fit easily. But I like the idia!
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#4 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: 5 speed gmc transmission , will it fit?
I used one of those in my 4 x 4 panel for 18 years.I found the split between 3 and 4 to be to great esp if you are pulling a load I pulled it when i took my detroit out of it. I felt that it was to much trans for a 283. I put a t5 behnd the 283 and if it doesn't work then i will go for an upgraded one or a 700r4 which I have ready to go in. I ran an independent np205 behind it
the shift pattern is also different as when you go from 3rd, you usually go up and to the right for 4th though on these you go to neutral and then drop back down for 4th and then up for 5th i never had any oroblem with it . it is a good heavy trans. you would never hurt it behind a sb. it has a much bigger input shaft if you want any measurements give me a holler and I willl get them for you as it is still waiting outside to get shipped ron Last edited by padresag; 10-06-2009 at 12:52 PM. |
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#5 |
283 Drama Queen
![]() Join Date: Dec 2004
Location: Surf City, CA
Posts: 2,435
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Re: 5 speed gmc transmission , will it fit?
Trust me......
__________________
For about 12 years of my adult life I had a severe speech impediment. My ex-wife never let me get a word in edgewise. |
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#6 | |
1961 crewcab
Join Date: Dec 2007
Location: missoula, mt
Posts: 6,164
|
Re: 5 speed gmc transmission , will it fit?
Quote:
do you have to get a custom clutch disc built foor it? other than that I should be able to bolt it to my 283 belhousing? I would love to have 1 more gear, then I might be able to go 65-70 on the highway! ![]() |
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#7 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: 5 speed gmc transmission , will it fit?
a 400 sbc used the same setup in a 4 or 6,000 series( would have more than likely used the same clutch setup whether or not that it was a NP--clarke or spicer etc would maybe have used the same size input. it will also hang there the same way that the stk trans did, just off the bellhousing. it should take a 1410 ujoint so you will have n/problem there as you can get a conversion joint which will match what you already have
Jolly has a 400sb sitting there in his yard with bellhousing flywheel ,everything that you would need which he may depart with separately. He did want $500.00 for the unit awhile back(eng and I imagine b/hoousing and clutchh assy would be inc but may be persuaded to depart with the clutch assy alone. Jolly is driving truck now but I think that he chks his email ron there are quite a few people looking for that trans so they bring a good $ on the market Last edited by padresag; 10-06-2009 at 06:36 PM. |
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#8 |
Just here to tinker
![]() Join Date: Jun 2008
Location: Holland, MI
Posts: 3,692
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Re: 5 speed gmc transmission , will it fit?
I know how you feel....
__________________
78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(winter unit)https://67-72chevytrucks.com/vboard/...25#post8900725 |
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#9 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: 5 speed gmc transmission , will it fit?
NP 5spd meaurements
the input shaft is 1 1/2"-10 spline----pilot bushing shaft size is 1" on the od frt mounting bolts across c-c 81/4"--top bottom across 9 1/4" I think that they are the same measure as a sm420 frt brg cover 5 1/4" dia ron Last edited by padresag; 10-09-2009 at 07:09 PM. |
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#10 |
1961 crewcab
Join Date: Dec 2007
Location: missoula, mt
Posts: 6,164
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Re: 5 speed gmc transmission , will it fit?
thank you for those measurements, now I have to get to work building something to put it in!!
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#11 |
1961 crewcab
Join Date: Dec 2007
Location: missoula, mt
Posts: 6,164
|
Re: 5 speed gmc transmission , will it fit?
I just found another one of these trannys, has the same shift pattern as mine, but it is in a chevy COE is there a way to change the shifter to one that work in a regular truck?
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60 build: http://67-72chevytrucks.com/vboard/s...d.php?t=280904 61 crew build: http://67-72chevytrucks.com/vboard/s...d.php?t=646830 63 build: http://67-72chevytrucks.com/vboard/s...d.php?t=336537 64 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=448681 65 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=590715 65 build: http://67-72chevytrucks.com/vboard/s...d.php?t=281955 |
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#12 |
Registered User
Join Date: Sep 2008
Location: San Carlos, Ca.
Posts: 3,048
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Re: 5 speed gmc transmission , will it fit?
I don't know about the shifter but I do know that those things are virtually indestructible. I had one in a 57 Napco 1 ton utility bed truck years ago. Oh yeah, they are REAL heavy too! Hope it works out for ya. I'd love to have another one in my '63... vintage O.D.!
__________________
Chris '63 k15 long step Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205 ![]() 52" front and 63" rear spring swap D44 / 14bff - disc axles Milemarker 9K and 10.5K hydraulic winches 63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29 |
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#13 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: 5 speed gmc transmission , will it fit?
you should just be able to change the top cover to a conventional one
ron you just have to find one |
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#14 |
1961 crewcab
Join Date: Dec 2007
Location: missoula, mt
Posts: 6,164
|
Re: 5 speed gmc transmission , will it fit?
thats what I was worried about, conventional 5 speed right?
I'll just have to come up with some sort of mid engined truck so I can use this tranny with the coe shifter ![]()
__________________
60 build: http://67-72chevytrucks.com/vboard/s...d.php?t=280904 61 crew build: http://67-72chevytrucks.com/vboard/s...d.php?t=646830 63 build: http://67-72chevytrucks.com/vboard/s...d.php?t=336537 64 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=448681 65 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=590715 65 build: http://67-72chevytrucks.com/vboard/s...d.php?t=281955 |
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#15 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: 5 speed gmc transmission , will it fit?
that I show you want to use it,isn't it. like a conventional. you just have to look for a clapped out tranny for the shft tower and with the top plate and your away. same trans , just different shifter
ron |
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#16 |
1961 crewcab
Join Date: Dec 2007
Location: missoula, mt
Posts: 6,164
|
Re: 5 speed gmc transmission , will it fit?
not sure I follow? would the shifter tower and top plate off a 4 spd work? I have plenty of those...
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60 build: http://67-72chevytrucks.com/vboard/s...d.php?t=280904 61 crew build: http://67-72chevytrucks.com/vboard/s...d.php?t=646830 63 build: http://67-72chevytrucks.com/vboard/s...d.php?t=336537 64 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=448681 65 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=590715 65 build: http://67-72chevytrucks.com/vboard/s...d.php?t=281955 |
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#17 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: 5 speed gmc transmission , will it fit?
the coe doesn't have the std shifter on it so you would have to get one off another 5 spd(conventional). those 5 spd have a different shift pattern. 3 and 4 are reversed. mine did anyway
ron |
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#18 |
1961 crewcab
Join Date: Dec 2007
Location: missoula, mt
Posts: 6,164
|
Re: 5 speed gmc transmission , will it fit?
...might just buy it to have in case something happens to the one I have then...you never know , might find a clapped out 5 speed down the road...
thanks for the info!
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60 build: http://67-72chevytrucks.com/vboard/s...d.php?t=280904 61 crew build: http://67-72chevytrucks.com/vboard/s...d.php?t=646830 63 build: http://67-72chevytrucks.com/vboard/s...d.php?t=336537 64 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=448681 65 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=590715 65 build: http://67-72chevytrucks.com/vboard/s...d.php?t=281955 |
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#19 |
Registered User
Join Date: Nov 2009
Location: stoddard nh
Posts: 693
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Re: 5 speed gmc transmission , will it fit?
did u mount the 5 speed in your 1/2 ton? thinking of doing it in my c20. thanks
__________________
1972 gmc c25 292/sm465 dana 60 w/5.13s 1973 vw super beetle 1600cc/4spd(baja bug) 1974 chevy c60 351v6/np-540+2 speed eaton rear 2005 chevy cobalt 2.2l |
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#20 |
1961 crewcab
Join Date: Dec 2007
Location: missoula, mt
Posts: 6,164
|
Re: 5 speed gmc transmission , will it fit?
haven't yet, but might be getting to it later this year.
__________________
60 build: http://67-72chevytrucks.com/vboard/s...d.php?t=280904 61 crew build: http://67-72chevytrucks.com/vboard/s...d.php?t=646830 63 build: http://67-72chevytrucks.com/vboard/s...d.php?t=336537 64 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=448681 65 'burb build: http://67-72chevytrucks.com/vboard/s...d.php?t=590715 65 build: http://67-72chevytrucks.com/vboard/s...d.php?t=281955 |
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#21 |
Registered User
Join Date: Nov 2009
Location: stoddard nh
Posts: 693
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Re: 5 speed gmc transmission , will it fit?
well i guess we'll see who gets their first lol btw this might help you maybe not his is the gl but i believe the cases are the same just the internals are different(im still researching)
http://www.bethsbackyard.com/NP540GL...escription.htm
__________________
1972 gmc c25 292/sm465 dana 60 w/5.13s 1973 vw super beetle 1600cc/4spd(baja bug) 1974 chevy c60 351v6/np-540+2 speed eaton rear 2005 chevy cobalt 2.2l |
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