1984 K5 Blazer Upgrade: SM465 swap to NV3500 Part 1

In this video, I'll walk through how to swap a 5-speed into a 1984 K5 Blazer that has a heavy duty 3-speed.

[@Sonofkharn]

Nice build! Just moved to CO and picked up my first K10. Looking to manual swap within the next month or two. Good video

[@myles2go.]

thank you and good luck on your swap!

[@davidechols6797]

The 208 shaft was the same size off the SM 465 as the 3500 because I want to do the same swap on mine and I want to use the same transfer case

[@MrYz250fman]

Have you had a chance to finish the swap? People say the front drive shaft has clearance issues with the bellhousing where the slave connects

[@myles2go.]

I did finish the swap and am getting close to editing all the footage for this truck. I will have it uploaded soon. I have a clip that shows exactly what you are talking about. I flexed out the suspension and jumped up and down on the fender to make it wiggle even more. I never had any clearance issues. It had maybe 3-4 inches of room left still in between there. I have also been wheeling with it for almost a year now with no issues. My truck is lifted though. I think the previous owner told me it was lifted 4 inches but i am not sure. If your truck is stock height, i think it would hit the front drive shaft. In that scenario, I would have just sourced a later model nv3500 with an internal slave cylinder.

[@morganschannel4085]

i believe that tranny is an HM290, basically the early versions of NV3500. Im manual swapping my 1992 C1500 and using the same tranny as you

[@leonardmoore5175]

Did you use the same clutch linkage that's mounted to the frame or did you have to use 89?

[@myles2go.]

i had to use the 89

[@ricardopadron241]

What did you use to hold down the clutch fork on the pivot ball

[@myles2go.]

nothing. i just grease it up and the force from the pressure plate hold it on. many clutches are set up like this

[@ramirodeloera6751]

How you do with the speed sensor on the new transmission

[@myles2go.]

the speed sensor goes into the transfer case. I kept my existing transfer case so nothing needed to be changed.

[@afastcuda1970]

The better mod but maybe more expensive is to add a gear vendors od. You can split the gears giving you a 6 speed and keep the granny low for a 7th gear.

[@myles2go.]

I have heard about that but had access to the parts for the 5 speed swap so i went that route.

[@johnrideabmx]

Nv3500 to np208? If so how did they connect them I’m wanting to switch my auto 83 k5 to manual

[@myles2go.]

i do not recall exactly what transfer case it was but it did just bolt right up. i didnt need any adapters. same spline count and length and bolt pattern.

[@johnrideabmx]

@@myles2go. yea I’m having some real trouble finding a 5speed near me

[@myles2go.]

@@johnrideabmx i also had a very hard time finding the trans. i planned the swap for a while before i found someone parting out an 89 gmc truck on facebook.

[@johnrideabmx]

@@myles2go. same every old thing I’ve bought with a 700 died and I can’t justify putting another one in I been one the hunt for standard stuff awhile

[@myles2go.]

@@johnrideabmx unfortunately, that was my experience as well with the 700r4 trans. good luck on the search!

[@kylesilcott]

This is a downgrade not an upgrade

[@systemfile]

From bulletproof to target practice

[@Josh_Playzzz]

@@systemfile from 50 mph to 100 slow 3 speed to good 5 speed