What size tailshaft for my TH-350? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Gregs67 · 11-09-2008, 11:09 AM

I am putting an automatic from a 70 4x4 into my 67 2WD step, and there is no tailshaft on the trans. I am trying to figure out if I will need a 6 or 9 inch tailshaft for it.

thank you.

**kwmech** · 11-09-2008, 12:45 PM

Yes, you will need the 2wd output shaft and housing

jescates · 11-09-2008, 08:52 PM

I believe it's the longer shaft of the two. When I did an inline 6 to V-8, the trany place told me I needed a long tail cone. Of course I had to explain that the original 3 spd was about the same length as a short cone turbo 350 and that my new V-8 was sitting in the inline 6 position....farther back than an original V-8. He told me it wouldn't work, but it did. That was until I bought some V-8 trees and moved the engine forward. Then I bought a new T350 with a 9 inch cone.

Longhorn Man · 11-09-2008, 09:59 PM

if you wanted it to be as original, then it would be a short shaft tranny.
However, that's only in 69 & up since 67 and 68 didn't get TH350s, they either got a powerglide, or a short shaft 400.
That 4X4 tranny case is worth more than a 2 wheel drive one. There's a lotta guys out there that don't realize you can convert a 2 wheel drive tranny to 4X4, so they will pay more money for that 4X4 case.
You may be able to sell it, buy the tranny to replace it, and pocket some coin.

11-09-2008, 11:09 AM	#1
Gregs67 Registered User Join Date: Oct 2008 Location: bath PA Posts: 22	What size tailshaft for my TH-350? I am putting an automatic from a 70 4x4 into my 67 2WD step, and there is no tailshaft on the trans. I am trying to figure out if I will need a 6 or 9 inch tailshaft for it. thank you.

11-09-2008, 12:45 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,574	Re: What size tailshaft for my TH-350? Yes, you will need the 2wd output shaft and housing

11-09-2008, 08:52 PM	#3
jescates Registered User Join Date: Aug 2001 Location: Mcloud, Oklahoma Posts: 656	Re: What size tailshaft for my TH-350? I believe it's the longer shaft of the two. When I did an inline 6 to V-8, the trany place told me I needed a long tail cone. Of course I had to explain that the original 3 spd was about the same length as a short cone turbo 350 and that my new V-8 was sitting in the inline 6 position....farther back than an original V-8. He told me it wouldn't work, but it did. That was until I bought some V-8 trees and moved the engine forward. Then I bought a new T350 with a 9 inch cone. __________________ 1970 C-10 LWB 1998 Jeep Wrangled TJ 2009 Honda VTX 1300 2013 Buick Enclave

11-09-2008, 09:59 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: What size tailshaft for my TH-350? if you wanted it to be as original, then it would be a short shaft tranny. However, that's only in 69 & up since 67 and 68 didn't get TH350s, they either got a powerglide, or a short shaft 400. That 4X4 tranny case is worth more than a 2 wheel drive one. There's a lotta guys out there that don't realize you can convert a 2 wheel drive tranny to 4X4, so they will pay more money for that 4X4 case. You may be able to sell it, buy the tranny to replace it, and pocket some coin.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.