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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 Master Mechanic

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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 Master Mechanic

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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"
     
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  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 Royal Smart Person Silver

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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?
     
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  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 Staff Member Moderator Silver

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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 Master Mechanic

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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.
     
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  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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