Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

TBI, computer, and transmission swap questions.

Discussion in '1992-Present Chevy & GMC models' started by ugly_blazer, Apr 15, 2005.

  1. ugly_blazer

    ugly_blazer 1/2 ton status

    Joined:
    Apr 12, 2004
    Posts:
    1,214
    Likes Received:
    0
    Ok guys, I have a 1989 C1500 with a 5.7 TBI motor and a 700R4 transmission. The transmission is bad. If I put a TH350 in place of the 700R4, will the engine still run right without the wires hooked up to the 700R4? Like the VSS? I know the speedo probably won't work, but that's ok. I just need to know if the engine will still run right with the Th350 or if it needs some transmission input into the computer?

    Thanks.
     
    Last edited: Apr 16, 2005
  2. ugly_blazer

    ugly_blazer 1/2 ton status

    Joined:
    Apr 12, 2004
    Posts:
    1,214
    Likes Received:
    0
  3. sweetk30

    sweetk30 professional hooker Premium Member

    Joined:
    Nov 1, 2004
    Posts:
    25,539
    Likes Received:
    538
    Location:
    horseheads , ny 14845
    yep mine ran fine. just couldnt get the speedo senson hooked upto easy. but some playing will get it for ya.
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,979
    Likes Received:
    189
    Location:
    Roy WA
    If the VSS is mounted in the tailshaft of the trans, then no it won't be right.

    Check some posts about VSS in the garage.
     
  5. jac6695

    jac6695 1/2 ton status

    Joined:
    May 2, 2002
    Posts:
    1,860
    Likes Received:
    0
    Location:
    Christiansburg, VA
    You can have a new chip burned to eliminate the VSS, but it will also disable some emmision controls like EGR, and may affect drivability to some extent. Second option would be to add an inline VSS to the cable output of the TH350. Check with www.jagsthatrun.com for that type of VSS.
     

Share This Page