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09-23-2004, 02:32 AM
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#1 |
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Registered User
Join Date: Feb 2003
Location: sw
Posts: 341
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69 GMC w/ a 465 ???
Hey guys, I have a 69 GMC 4 spd ( 2wheel dr ) but it looks different from my other iron case 465 . It looks like it has an aluminum top cover & it has NP for New Process I guess. Will this bolt up to a 203 transfer case that already has a th 350 bolted up to it or do I need a different adapter ? Thank you in advance !
Last edited by charlieo; 09-23-2004 at 02:43 AM. |
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09-23-2004, 02:40 AM
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#2 |
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Join Date: Sep 2004
Posts: 17
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I think you need an adapter
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09-23-2004, 03:36 AM
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#3 |
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Registered User
Join Date: Feb 2003
Location: The Rubber City
Posts: 5,498
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The only thing I could think of would be to find an adapter from a Dodge or Ford that originally had a NP435 and a NP203, but that combo seems to be pretty hard to find. I am not even sure if the 4x4 tailhousing from the other makes would work. I wish I could help more but there arent many GM's that came with the NP435, and little is known about it. One thing though, if you were to find an adapter and transfer case that would work, the mainshaft of the 2wd NP435 is 35 spline, and NP203's are not 35 spline input. You would need to get the mainshaft from a Dodge or Ford tranny to match, but that would be a lot of work. You could even look for a divorced NP203, but they are like hens teeth. Good luck!
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1969 GMC K2500  1996 Honda Accord 2007 Kawasaki KLR 650 |
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09-23-2004, 04:18 AM
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#4 |
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Registered User
Join Date: Feb 2003
Location: sw
Posts: 341
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So u think this trans is a NP435 ?
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09-23-2004, 10:35 AM
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#5 |
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user # 2756
 
Join Date: Jun 2001
Location: Chesapeake, Virginia
Posts: 4,612
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Some 2wds came with the NP435, 4spd. Has closer ratios than the SM465 and the first gear is not real low. A neighbor had a NP435 in a 79 ford the transfer case front output is on the wrong side.
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm 
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09-23-2004, 12:50 PM
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#6 |
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Registered User
Join Date: Feb 2003
Location: The Rubber City
Posts: 5,498
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Yes that is a NP435. They actually could be ordered from the factory either as a close ratio or wide ratio, and I believe the wide ratio has a 6.32 1st gear.
Jim brought up a good point that I forgot. The Ford transfer case won't work unless you swap in a different axle, due to it having driver side drop transfer case and front axle. You would have to use Dodge parts, which have the same passenger side drop as GM.
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1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650 |
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