6066 (1960-1966) GMC Truck Club - 64 GMC swb transmission

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Jduckett

May 23rd, 2016 01:11 AM

64 GMC swb transmission

Hey guys

I'm wanting to swap my 3speed transmission 64 GMC swb to a 3 speed synchro transmission. Can anyone give advice and part# and model of a suitable transmission. Would a SM326 work and be a direct bolt in. Thank in advance for any advice.

Jeff

AZKen

May 23rd, 2016 06:01 AM

Re: 64 GMC swb transmission

Tech tip right here in River City.
http://6066gmcguy.com/3-to-4-speed.html

I believe the Synchro 326 is a bolt in for a non Synchro 318. May need slip yoke change (spline count), and possible: linkage, speedo cable, and speedo gear modification. BW OD available for those. Hens teeth.

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