Longhorn sm465 vs. Np435 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69GMCLonghorn · 10-21-2008, 10:14 AM

I have a problem here and no one seems to be able to help. I have a 69 GMC 1-Ton Longhorn with a 4-speed. Now, how many of you are saying, "Oh, he has an SM465"?? Same as I thought... Well, it turns out that it is a New Process NP435. This was the tranny, and I quote, "that was used in Dodge, Ford and a few GM trucks..." Here's the problem: I shelled out the old credit card and bought a Gear Vendors unit... for an SM465!! When I realized the problem, they were unable to help and told me to send it back for a refund. The 435 in my truck had a different output shaft or some &%$# thing and they couldn't come up with the right adaptor.

Does anybody have any info as to whether my 435 is really different than say a Ford or Dodge version? I can't find any info online about this.

Brad · 10-21-2008, 11:39 AM

I used to have one and did a little research and I'm almost 99.9% sure that the bellhousing mount will be different (standard GM), but I doubt this helps you much.

**WorkinLonghorn** · 10-21-2008, 01:07 PM

Here is some interesting info on the NP435 that may answer your question;
http://www.novak-adapt.com/knowledge/np435.htm

airdale94 · 10-21-2008, 04:21 PM

Just get yourself a 465. Hold on to that GM 435 though. I may be interested in it. PM me so we don't step on any toes.

factorystock · 10-21-2008, 07:43 PM

Overdrives usually bolt to the output, and the output shafts may be the same for all makes. The 435 seems to be different only in the input shafts according to the previous link. Tell them you made a mistake and it is a Dodge, not a GMC?

**WorkinLonghorn** · 10-21-2008, 09:03 PM

X-2 ^ . Output may be the same, check it out. The 435 is better anyway unless you pull a massive trailer or something.

67_C-30 · 10-21-2008, 09:09 PM

I am interested in this as well because I just put a NP-435 in my '67 C-30.Eventually, I plan on putting a GV on it, but if I can't, I'll probably look into doing a NV4500 swap.

Wrenchbender Ret · 10-22-2008, 05:25 PM

I would get a SM465 like Airdale says. They are a dime a dozen & are almost bullet proof. We used to have trouble with the NP trans breaking syncros all the time.

stllookn · 10-22-2008, 05:32 PM

I've got two you could have but shipping would kill you...LOL! I am sure someone close to you probably has one they would love you to take off their hands.

10-21-2008, 10:14 AM	#1
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Longhorn sm465 vs. Np435 I have a problem here and no one seems to be able to help. I have a 69 GMC 1-Ton Longhorn with a 4-speed. Now, how many of you are saying, "Oh, he has an SM465"?? Same as I thought... Well, it turns out that it is a New Process NP435. This was the tranny, and I quote, "that was used in Dodge, Ford and a few GM trucks..." Here's the problem: I shelled out the old credit card and bought a Gear Vendors unit... for an SM465!! When I realized the problem, they were unable to help and told me to send it back for a refund. The 435 in my truck had a different output shaft or some &%$# thing and they couldn't come up with the right adaptor. Does anybody have any info as to whether my 435 is really different than say a Ford or Dodge version? I can't find any info online about this.

10-21-2008, 11:39 AM	#2
Brad Out of the carpool lane. Join Date: Jan 2000 Location: Clark Co, WA Posts: 5,673	Re: Longhorn sm465 vs. Np435 I used to have one and did a little research and I'm almost 99.9% sure that the bellhousing mount will be different (standard GM), but I doubt this helps you much. __________________ 1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red 1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!) 2000 Honda VFR in the faster yellow! 2008 Husqvarna TE-610 1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

10-21-2008, 01:07 PM	#3
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: Longhorn sm465 vs. Np435 Here is some interesting info on the NP435 that may answer your question; http://www.novak-adapt.com/knowledge/np435.htm __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.

10-21-2008, 04:21 PM	#4
airdale94 Registered User Join Date: Jan 2007 Location: Topeka,KS Posts: 778	Re: Longhorn sm465 vs. Np435 Just get yourself a 465. Hold on to that GM 435 though. I may be interested in it. PM me so we don't step on any toes.

10-21-2008, 07:43 PM	#5
factorystock Registered User Join Date: Feb 2007 Location: west coast Posts: 3,369	Re: Longhorn sm465 vs. Np435 Overdrives usually bolt to the output, and the output shafts may be the same for all makes. The 435 seems to be different only in the input shafts according to the previous link. Tell them you made a mistake and it is a Dodge, not a GMC?

10-21-2008, 09:03 PM	#6
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: Longhorn sm465 vs. Np435 X-2 ^ . Output may be the same, check it out. The 435 is better anyway unless you pull a massive trailer or something. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.

10-21-2008, 09:09 PM	#7
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: Longhorn sm465 vs. Np435 I am interested in this as well because I just put a NP-435 in my '67 C-30.Eventually, I plan on putting a GV on it, but if I can't, I'll probably look into doing a NV4500 swap. __________________ '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!

10-22-2008, 05:25 PM	#8
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,208	Re: Longhorn sm465 vs. Np435 I would get a SM465 like Airdale says. They are a dime a dozen & are almost bullet proof. We used to have trouble with the NP trans breaking syncros all the time.

10-22-2008, 05:32 PM	#9
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Re: Longhorn sm465 vs. Np435 I've got two you could have but shipping would kill you...LOL! I am sure someone close to you probably has one they would love you to take off their hands. __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)



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