Author Topic: going from th350c(9") to th350 (6")  (Read 5073 times)

Offline 305chevy c-10

  • Frequent Member
  • **
  • Posts: 292
going from th350c(9") to th350 (6")
« on: September 15, 2013, 08:21:48 pm »
has anyone ever went from a th350c 9" tail to a th350 6" tail .drive shaft is about 3"to short  with this trans .first i thought about buying new longer d shaft but then a guy said they make 8" yokes (yoke for 350c is about 5.5 inches) and this will work but i needed more feed back from my fam  THE  ;) CHEVY C-10 LOVERS .just to make sure he wasnt just trying to sell something
Heartbeat of America yesterday's cheverolet
18T5C10

Offline zieg85

  • Global Moderator
  • Senior Member
  • ****
  • Posts: 7595
    • 73-87 GM squarebody extended cab and conversions up to 91 R/V series
Re: going from th350c(9") to th350 (6")
« Reply #1 on: September 15, 2013, 09:24:08 pm »
has anyone ever went from a th350c 9" tail to a th350 6" tail .drive shaft is about 3"to short  with this trans .first i thought about buying new longer d shaft but then a guy said they make 8" yokes (yoke for 350c is about 5.5 inches) and this will work but i needed more feed back from my fam  THE  ;) CHEVY C-10 LOVERS .just to make sure he wasnt just trying to sell something

I am only familiar with the longbeds.  The short TH350 is the same as a truck with a 3 or 4 speed OD manual.  Longbeds went with a 2 piece shaft. 
Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: going from th350c(9") to th350 (6")
« Reply #2 on: September 18, 2013, 12:16:48 am »
when i went to a long to short i bent into a bone yard and found a two piece. it was a little shorter than i need but made her work. the one junkyard i worked at would put all the drive shafts on a shelf and you could just pick what you wanted.
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline werewolfx13

  • Site Supporters
  • Junior Member
  • ******
  • Posts: 841
Re: going from th350c(9") to th350 (6")
« Reply #3 on: September 22, 2013, 12:28:02 pm »
Output shafts from th350c and th350 can be interchanged. I'd just swap the output shaft with the length you need and be done. Takes about an hour with the transmission on a bench. I remove everything and set it on a clean foam sheet in the order I remove it, except for the clutch packs, I slide those over a horizontal tube in both the same order I remove them, AND the same orientation & clocking.

Not all longbeds came with 2 piece shafts either, I still have the driveshaft out of my '84 GMC c1500 hanging in my parents garage..its a one piece driveshaft for a TH350c w/ a 9" tail housing.
« Last Edit: September 22, 2013, 12:33:17 pm by werewolfx13 »
Chris
'83 Chevy c10 Silverado SWB
'76 Chevy k20 LWB 6.5'x8' Flatbed
“I know that you believe you understand what you think I said, but I'm not sure you realize that what you heard is not what I meant.”