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Yoke and Driveshaft mods

Discussion in 'Chassis / Drivetrain / Suspension / Wheels' started by Dinosport, Dec 19, 2016.

  1. Dinosport

    Dinosport Master Mechanic

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    I have a 350 now with a 200c trans. I going to swap a 700r4 into it. Does anybody know if the yoke will fit and how much I will need to cut off the driveshaft. I know it's best to just install and measure but it would be nice to install it in one day and be done with it if possible.
     
  2. UNGN

    UNGN G-Body Guru

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    I don't know about the TH200C, but for a TH350 to 700R4 swap I did 20 years ago, I had to cut 3" off the driveshaft. That was the only mod the shaft needed.

    I would think the TH200C is close n length to a TH350, but have never owned one.
     
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  3. pontiacgp

    pontiacgp Rocket Powered Basset Hound

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  4. UNGN

    UNGN G-Body Guru

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    The upper part of the chart isn't right.

    The lower part where it says a 700R4 is 30 3/4" is correct. Weird they have two dimensions for a 700R4. As I have said many times: "Anybody can put a table on the internet. It doesn't mean it is right"
     
  5. pontiacgp

    pontiacgp Rocket Powered Basset Hound

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    I missed that, thanks for pointing that out...
     
    #5 pontiacgp, Dec 19, 2016
    Last edited: Dec 19, 2016
  6. Texas82GP

    Texas82GP Comic Book Super Hero
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    Could there be a difference in length on a 700R4 depending on a car or truck application or depending on 2wd or 4wd?
     
  7. pontiacgp

    pontiacgp Rocket Powered Basset Hound

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    I read the 4 wheel drive was shorter....
     
  8. Opie Knievel

    Opie Knievel Moderator
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    My car had a TH200 in it when I bought it. I swapped in a TH350. I used the same driveshaft. The TH200 & TH350 are almost exactly the same length. If cutting off 3 inches is what it takes to swap a TH350 to a 700R4, it should also work for the TH200.
     
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  9. UNGN

    UNGN G-Body Guru

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    Maybe, but what would a Chevelle website care about the length of a 4X4 700R4? The "Cut and Paste" internet table strikes again to confuse and misinform.

    I would have loved to not cut 3" off the driveshaft of my '72 Chevelle, but I had to for this swap. If I had swapped in a 200R4 I could have used an unmodified drive shaft. (I didn't know this at the time and I slapped my forehead because the Greenville Transmission Clinic in Greenville SC - where I lived - did great work with the 200R4)

    20 years ago I think it only cost me $35 to have the driveshaft shortened and balanced so it wasn't a huge issue. Those were the good old days.
     
  10. Dinosport

    Dinosport Master Mechanic

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    Nice thanks guys. I guess 3 inches is the unanimous ruling. The chart is interesting. While i was looking at the top chart I said to my self that cant be right. Well I guess i wasnt. Still a good reference point.,
     
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