TH350 length vs. 3 speed... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

EARNHARDT#3 · 09-30-2015, 07:46 PM

I'm contemplating putting a TH350 in my '67 with a 250 6. I've read that the short shaft car TH350 is the same length as the 3 speed Saginaw. But my 67 has the older 3 speed with no 1st gear synchro (can't remember what model). Anyone know if my trans and the TH350 are the same length? Also, are the output shafts/yokes the same style? I know I'll need the auto crossmember, shift linkage etc.

firedemon · 09-30-2015, 08:51 PM

I read on here somewhere that the yoke is different but unsure of the rest but I have the same problem so I look foreward to this one

Theglassguy · 09-30-2015, 08:55 PM

Yes they are the same. If you get the short tail turbo 350. You'll be able to use your same drive shaft and yolk. I just changed mine on my 69 short bed. You have to cut out the cross member for the standard transmission. I cut the rivets off mine. The top ones will be hard to get to. I had my cab off when I did mine.

EARNHARDT#3 · 09-30-2015, 09:19 PM

Ok thanks. But my '67 has a different transmission than a '69. That's what I'm trying to find out. If the early trans is the same length and yoke as well.

Theglassguy · 09-30-2015, 09:46 PM

I didn't know the 67 - 69 transmission was different . The turbo 350 has a 27 spline output shaft if yours is 27 spline they would interchange.

mike16 · 10-01-2015, 01:22 AM

i have a 72 c10 3 speed, Its a bit of a pill but its ok. I have thought long and hard about a 5 speed overdrive. or a 4 speed automatic with overdrive.

if your going to that much trouble then go the whole way and make it an overdrive.

EARNHARDT#3 · 10-01-2015, 05:52 AM

Quote:

Originally Posted by mike16

i have a 72 c10 3 speed, Its a bit of a pill but its ok. I have thought long and hard about a 5 speed overdrive. or a 4 speed automatic with overdrive.

if your going to that much trouble then go the whole way and make it an overdrive.

I already get 17mpg cruising st 70 on the highway with the 3 speed manual!

midniteblues · 10-01-2015, 08:30 AM

the 3spd muncies are shorter than the later saginaw trans.the slip yoke has differnt splines.
i dont recall if the input shaft had differnt splines or not.

we put a short tail th350 in the kids 67 and the speedo cable was a lil' too taught for my liking.

EARNHARDT#3 · 10-01-2015, 08:58 AM

I'm starting to understand why so many people put V8's in these trucks LOL

09-30-2015, 07:46 PM	#1
EARNHARDT#3 Registered User Join Date: May 2014 Location: PA Posts: 1,417	TH350 length vs. 3 speed... I'm contemplating putting a TH350 in my '67 with a 250 6. I've read that the short shaft car TH350 is the same length as the 3 speed Saginaw. But my 67 has the older 3 speed with no 1st gear synchro (can't remember what model). Anyone know if my trans and the TH350 are the same length? Also, are the output shafts/yokes the same style? I know I'll need the auto crossmember, shift linkage etc. __________________ 1967 C10, LWB, 250, Powerglide, PS, PB, 3/4 STATIC DROP

09-30-2015, 08:51 PM	#2
firedemon Registered User Join Date: Jun 2015 Location: @ Posts: 890	Re: TH350 length vs. 3 speed... I read on here somewhere that the yoke is different but unsure of the rest but I have the same problem so I look foreward to this one

09-30-2015, 09:19 PM	#4
EARNHARDT#3 Registered User Join Date: May 2014 Location: PA Posts: 1,417	Re: TH350 length vs. 3 speed... Ok thanks. But my '67 has a different transmission than a '69. That's what I'm trying to find out. If the early trans is the same length and yoke as well. __________________ 1967 C10, LWB, 250, Powerglide, PS, PB, 3/4 STATIC DROP

09-30-2015, 09:46 PM	#5
Theglassguy Registered User Join Date: Sep 2015 Location: carrollton texas Posts: 4	Re: TH350 length vs. 3 speed... I didn't know the 67 - 69 transmission was different . The turbo 350 has a 27 spline output shaft if yours is 27 spline they would interchange.

10-01-2015, 01:22 AM	#6
mike16 Registered User Join Date: Dec 2009 Location: bisbee, arizona Posts: 1,529	Re: TH350 length vs. 3 speed... i have a 72 c10 3 speed, Its a bit of a pill but its ok. I have thought long and hard about a 5 speed overdrive. or a 4 speed automatic with overdrive. if your going to that much trouble then go the whole way and make it an overdrive.

09-30-2015, 08:55 PM	#3
Theglassguy Registered User Join Date: Sep 2015 Location: carrollton texas Posts: 4	Re: TH350 length vs. 3 speed... Yes they are the same. If you get the short tail turbo 350. You'll be able to use your same drive shaft and yolk. I just changed mine on my 69 short bed. You have to cut out the cross member for the standard transmission. I cut the rivets off mine. The top ones will be hard to get to. I had my cab off when I did mine.

10-01-2015, 08:30 AM	#8
midniteblues Registered User Join Date: Jul 2011 Location: strausstown pa Posts: 3,394	Re: TH350 length vs. 3 speed... the 3spd muncies are shorter than the later saginaw trans.the slip yoke has differnt splines. i dont recall if the input shaft had differnt splines or not. we put a short tail th350 in the kids 67 and the speedo cable was a lil' too taught for my liking. __________________ 81 camaro 355 4/spd 342 posi my first love. 67 swb step 454/4spd ott 373 posi 4/7 drop. 2000 s10 zr2 little blue truck that never gets stuck. '74 heald super bronc vt8. tecumseh powered moon rover.

10-01-2015, 08:58 AM	#9
EARNHARDT#3 Registered User Join Date: May 2014 Location: PA Posts: 1,417	Re: TH350 length vs. 3 speed... I'm starting to understand why so many people put V8's in these trucks LOL __________________ 1967 C10, LWB, 250, Powerglide, PS, PB, 3/4 STATIC DROP



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