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11-04-2004, 08:53 PM
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#1 |
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Shortbox wanna-be.
Join Date: Mar 2002
Location: Fort St.John, British Columbia, Canada
Posts: 773
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Driveshaft differences between a TH350 & TH400 ????
I bought a rolling shortbox frame which included a 12 bolt rear and the 2 piece drive shaft. I know the truck originally had a small block in it, so I assume it had a TH350 trans. (1970)
I am installing an original BB402 with the matching TH400 into this frame. Will the 2 piece drive shaft still work? Or were they different between the 2 ? thanks
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1970 Chevy C20 Custom Camper 402BB Turbo 400 trans. (Slowly becoming a '70 shortbox 1/2 ton) '71 Camaro SS 402/T400 resto '97 Z28 (11.41@127MPH) 
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11-04-2004, 08:59 PM
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#2 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Yes--you will have to change the front yoke to 400 style.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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11-04-2004, 09:09 PM
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#3 |
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Registered User
 
Join Date: Apr 2004
Location: The Other Maine!
Posts: 2,236
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jhow66 is correct, the 400 is a fine spline with more teeth which makes it more heavy duty
than the 350 coarse spline.
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1968 Chevy 4x4 307 4 speed |
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11-04-2004, 09:24 PM
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#4 |
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Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,948
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plus depending on the tailshaft length you might have to get the driveshaft cut down
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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11-04-2004, 09:48 PM
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#5 | |
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Shortbox wanna-be.
Join Date: Mar 2002
Location: Fort St.John, British Columbia, Canada
Posts: 773
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Quote:
Ok, I can do that. I have the original yoke still on the driveshaft on the 3/4 ton frame. There is no way for me to measure tailshaft length as I don't have the TH350 that was in the shortbox frame. Does anyone know the difference in lengths?
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1970 Chevy C20 Custom Camper 402BB Turbo 400 trans. (Slowly becoming a '70 shortbox 1/2 ton) '71 Camaro SS 402/T400 resto '97 Z28 (11.41@127MPH)
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11-04-2004, 10:16 PM
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#6 |
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Registered User
Join Date: May 2003
Location: Shreveport LA
Posts: 3,170
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Transmission dimensions: http://tciauto.com/tech_info/trans_dims.htm
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11-04-2004, 10:27 PM
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#7 |
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Shortbox wanna-be.
Join Date: Mar 2002
Location: Fort St.John, British Columbia, Canada
Posts: 773
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Can anyone tell me what the TH350 tail shaft length was on a '70 C-10 with a small block?
__________________
1970 Chevy C20 Custom Camper 402BB Turbo 400 trans. (Slowly becoming a '70 shortbox 1/2 ton) '71 Camaro SS 402/T400 resto '97 Z28 (11.41@127MPH)
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11-04-2004, 10:46 PM
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#8 |
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Senior Member
Join Date: Oct 2001
Location: Lancaster S.C.
Posts: 4,764
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Ditch the 2 piece and put a single driveline in,you want regreat it!
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Things happen for a reason! |
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11-04-2004, 10:51 PM
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#9 | |
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Shortbox wanna-be.
Join Date: Mar 2002
Location: Fort St.John, British Columbia, Canada
Posts: 773
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Quote:
Actually that is my overall plan. This is to just get me by for now. I just want to get the truck mobile first. I can change out the driveshaft later on. I am trying to only spend my cash on stuff I NEED right now, with all the goodies later on. 
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11-04-2004, 11:29 PM
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#10 | |
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Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Quote:
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I'm on the Instagram- @Gearhead_Kevin |
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