3 speed to TH350: Shopping for correct Yoke - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Joe T · 07-20-2011, 02:05 PM

So I am going to convert my 3 speed to a TH350. I am trying to find the correct Yoke for my 71 3 speed drive shaft. This is the first time I am doing this, not sure it uses outside or inside clips. I inquired on ebay and got this back from a seller:

The 350 yokes comes in many different u-joints and lengths.Does the joint in the shaft use inside or outside clips.If outside we need the cap dia and joint width.Also what kind of vehicle did the trans come out of.

does anyone know which type of yoke i should get?

JORGIE95961 · 07-20-2011, 02:12 PM

When i did mine i thougt i had th right one.. The driveline shop swaped me and got it right

Joe T · 07-20-2011, 02:27 PM

Quote:

Originally Posted by JORGIE95961

When i did mine i thougt i had th right one.. The driveline shop swaped me and got it right

what did you end up paying for them to change it? i wonder how to find a shop around me

JORGIE95961 · 07-20-2011, 02:34 PM

Quote:

Originally Posted by Joe T

what did you end up paying for them to change it? i wonder how to find a shop around me

i paid 180 to have them shorten an change the yoke and balance

crazy longhorn · 07-20-2011, 04:48 PM

Count the bolts on the side plate on your 3spd(should be 7, if original)....if thats the case, you have the proper slipyolk already, & the drive shaft is the proper lenght ,for a short(6" tailshaft 350 hydro). crazyL

JORGIE95961 · 07-20-2011, 04:51 PM

Quote:

Originally Posted by crazy longhorn

Count the bolts on the side plate on your 3spd(should be 7, if original)....if thats the case, you have the proper slipyolk already, & the drive shaft is the proper lenght ,for a short(6" tailshaft 350 hydro). crazyL

REALLY I HAD THE SAME SETUP, never counted the bolts.. and it was totaly different if h.. wait mine was a 4 speed.. nevermind

Joe T · 07-20-2011, 08:43 PM

Quote:

Originally Posted by crazy longhorn

Count the bolts on the side plate on your 3spd(should be 7, if original)....if thats the case, you have the proper slipyolk already, & the drive shaft is the proper lenght ,for a short(6" tailshaft 350 hydro). crazyL

really? i thought i had to change the yoke. it is the original 3 speed i have in there. thanks, this would be awesome if i don't need to change it

Tx Firefighter · 07-21-2011, 07:16 AM

Same yoke

72freak · 07-21-2011, 09:17 AM

I also think its the same...try sliding it in. If it needs to be shortened it should be no more that $50 including balancing. Lengthened it will be about $150. Just type in Driveshaft Services for your area...there will be something.

Wrenchbender Ret · 07-21-2011, 02:55 PM

They are probably the same but the 3 speed has a vent hole in the plug at the end of the splines. It should be welded shut.

blkcorvair · 07-21-2011, 07:48 PM

Sorry to Hyjack the thread. But since this came up does the TH350 Fit in the low hump tunnel? Or does it need the high hump? Thinking of the same conversion.

Tx Firefighter · 07-21-2011, 07:54 PM

Th350 fits under low hump fine. That's the standard configuration the factory did when they were new.

**passthebuck** · 07-21-2011, 11:30 PM

Changed my L6/3 sp to a smallblock/700r4 last week & I was able to use the same yoke & same driveshaft length.

Joe T · 07-22-2011, 10:54 AM

thanks for the help, plan on doing this soon!

07-20-2011, 02:05 PM	#1
Joe T Registered User Join Date: Mar 2007 Location: Pa Posts: 50	3 speed to TH350: Shopping for correct Yoke So I am going to convert my 3 speed to a TH350. I am trying to find the correct Yoke for my 71 3 speed drive shaft. This is the first time I am doing this, not sure it uses outside or inside clips. I inquired on ebay and got this back from a seller: The 350 yokes comes in many different u-joints and lengths.Does the joint in the shaft use inside or outside clips.If outside we need the cap dia and joint width.Also what kind of vehicle did the trans come out of. does anyone know which type of yoke i should get?

07-20-2011, 02:12 PM	#2
JORGIE95961 Registered User Join Date: Feb 2011 Location: OLIVEHURST CA Posts: 570	Re: 3 speed to TH350: Shopping for correct Yoke When i did mine i thougt i had th right one.. The driveline shop swaped me and got it right

07-20-2011, 04:48 PM	#5
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	Re: 3 speed to TH350: Shopping for correct Yoke Count the bolts on the side plate on your 3spd(should be 7, if original)....if thats the case, you have the proper slipyolk already, & the drive shaft is the proper lenght ,for a short(6" tailshaft 350 hydro). crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

07-21-2011, 07:16 AM	#8
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: 3 speed to TH350: Shopping for correct Yoke Same yoke __________________ I'm on the Instagram- @Gearhead_Kevin

07-21-2011, 09:17 AM	#9
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	Re: 3 speed to TH350: Shopping for correct Yoke I also think its the same...try sliding it in. If it needs to be shortened it should be no more that $50 including balancing. Lengthened it will be about $150. Just type in Driveshaft Services for your area...there will be something. __________________ 2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! *It's not just a hobby..It's a LIFESTYLE!!!* Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere!

07-21-2011, 02:55 PM	#10
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,206	Re: 3 speed to TH350: Shopping for correct Yoke They are probably the same but the 3 speed has a vent hole in the plug at the end of the splines. It should be welded shut.

07-21-2011, 07:48 PM	#11
blkcorvair Registered User Join Date: May 2011 Location: Long Island NY Posts: 787	Re: 3 speed to TH350: Shopping for correct Yoke Sorry to Hyjack the thread. But since this came up does the TH350 Fit in the low hump tunnel? Or does it need the high hump? Thinking of the same conversion.

07-21-2011, 07:54 PM	#12
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: 3 speed to TH350: Shopping for correct Yoke Th350 fits under low hump fine. That's the standard configuration the factory did when they were new. __________________ I'm on the Instagram- @Gearhead_Kevin

07-21-2011, 11:30 PM	#13
passthebuck Sisyphus was my mentor! Join Date: Sep 2002 Location: Carleton Place, Ontario CANADA Posts: 984	Re: 3 speed to TH350: Shopping for correct Yoke Changed my L6/3 sp to a smallblock/700r4 last week & I was able to use the same yoke & same driveshaft length. __________________ passthebuck #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car

07-22-2011, 10:54 AM	#14
Joe T Registered User Join Date: Mar 2007 Location: Pa Posts: 50	Re: 3 speed to TH350: Shopping for correct Yoke thanks for the help, plan on doing this soon!



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