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350 v/s 700r

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dduckblazer, Apr 21, 2002.

  1. dduckblazer

    dduckblazer Registered Member

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    what's better The 350 or the 700r trans. I have a 700r in my truck and a 350 laying around. Just wondering if I should save it for a rainy day.
     
  2. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    That all depends on if you want O/D or not. The 700's did have problems until about 1988 when GM finally corrected them. As for saving the TH350 for a rainy day, if you needed to install it sometime you would need a new crossmember, t/c adapter, drivelines, and shifter.
     
  3. xnoahx

    xnoahx 1/2 ton status

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    Im pretty sure that it would be a direct swap other than having to move the t-case crossmember forward a bit. I think the adapeter and all the other stuff is the same
     
  4. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    The TH350 is 1 7/8" shorter than a 700R4. That would make the rear driveline 1 7/8" too short and the front 1 7/8" too long. The adapter is also different between TH350 and 700R4 due to the different output shaft lengths. The T/C shifter rod can be shortened and reused though. The crossmember will need to be moved forward 1 7/8" not replaced like I previously said.
     

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