Does the Output Yoke slide out? Muncie 4spd - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Gregski** · 02-14-2015, 10:56 PM

In order to remove the drive shaft from a Muncie 4 speed transmission can you just slide the drive shaft out towards the rear of the '74 truck?

I had to unbolt the pinion yoke/flange straps on mine

my terminology may be all way off, so here is a pic of what I am talking about

buddy_1 · 02-14-2015, 11:28 PM

That style yoke is bolted on. Look in the middle of the ears and remove the attaching bolt to remove the yoke. Buddy

greg64 · 02-14-2015, 11:47 PM

Ya, Greg, there's a big bastard nut on the end of the transmission output shaft that holds the yoke on. Unlike turbo 350/400 (and many others) which have the driveshaft yoke as a slip (splined) joint, the sm465 puts the slip joint in the shaft itself.

The way you took it apart is completely correct (taking the straps off the ujoint).

**Gregski** · 02-15-2015, 02:10 AM

thanks I thought the shaft ought to travel in and out a bit as the rear suspension gives or especially when you lower the truck, is it because we have a two piece drive shaft that it doesn't have to go in and out of the tranny

by the way I only wanted to take it out / remove it if indeed it was supposed to slide out, in that case I wanted to ensure it glides in and out as it is supposed to, no need to take it out now that I know it is a fixed design

thank you very much again

**special-K** · 02-15-2015, 09:22 AM

There should be a slip yoke in the driveshaft

**hatzie** · 02-15-2015, 10:27 PM

An original SM465 should have a 2 piece driveshaft. A slip joint is between the axle and the carrier bearing and a short shaft between the carrier bearing and the tranny.

02-14-2015, 10:56 PM	#1
Gregski Post Whore Join Date: Aug 2014 Location: Sacramento, CA Posts: 10,863	Does the Output Yoke slide out? Muncie 4spd In order to remove the drive shaft from a Muncie 4 speed transmission can you just slide the drive shaft out towards the rear of the '74 truck? I had to unbolt the pinion yoke/flange straps on mine my terminology may be all way off, so here is a pic of what I am talking about Attached Images

02-14-2015, 11:28 PM	#2
buddy_1 Registered User Join Date: Dec 2013 Location: Humble, Texas Posts: 185	Re: Does the Output Yoke slide out? Muncie 4spd That style yoke is bolted on. Look in the middle of the ears and remove the attaching bolt to remove the yoke. Buddy __________________ I know the "VOICES" aren't real but they have some great ideas. 1978 GMC Sierra Classic C25 1983 Datsun 280ZX Turbo 1997 Chevy Cheyenne K2500 1999 Polaris Sport 400

02-14-2015, 11:47 PM	#3
greg64 Registered User Join Date: Dec 2007 Location: Kimberley, BC, Canada Posts: 799	Re: Does the Output Yoke slide out? Muncie 4spd Ya, Greg, there's a big bastard nut on the end of the transmission output shaft that holds the yoke on. Unlike turbo 350/400 (and many others) which have the driveshaft yoke as a slip (splined) joint, the sm465 puts the slip joint in the shaft itself. The way you took it apart is completely correct (taking the straps off the ujoint). __________________ Greg 64 GMC Suburban - 283, NV3500, 14 bolt 77 C10 swb - 292, SM465, 12 bolt

02-15-2015, 02:10 AM	#4
Gregski Post Whore Join Date: Aug 2014 Location: Sacramento, CA Posts: 10,863	Re: Does the Output Yoke slide out? Muncie 4spd thanks I thought the shaft ought to travel in and out a bit as the rear suspension gives or especially when you lower the truck, is it because we have a two piece drive shaft that it doesn't have to go in and out of the tranny by the way I only wanted to take it out / remove it if indeed it was supposed to slide out, in that case I wanted to ensure it glides in and out as it is supposed to, no need to take it out now that I know it is a fixed design thank you very much again Last edited by Gregski; 02-15-2015 at 02:22 AM.

02-15-2015, 09:22 AM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Does the Output Yoke slide out? Muncie 4spd There should be a slip yoke in the driveshaft __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-15-2015, 10:27 PM	#6
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: Does the Output Yoke slide out? Muncie 4spd An original SM465 should have a 2 piece driveshaft. A slip joint is between the axle and the carrier bearing and a short shaft between the carrier bearing and the tranny. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.



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