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  1. J

    700R4 Lockup Torque converter control issues solved

    I found this guy that had restored this harness out of one. It seems to have two vacuum mechanisms on it.
  2. J

    700R4 Lockup Torque converter control issues solved

    Is there two separate vacuums I should be hooking up on the firewall or just that driver side one? I found I have two wires blue/yellow that seem to go to the same harness that were cut on the firewall and I found this green plug just inside the firewall.
  3. J

    700R4 Lockup Torque converter control issues solved

    @Turbo4whl Would it be possible to run a switch just for 4th gear lockup even though I have the 3 wire setup that’s for 3/4 lockup? The truck is mostly just an around town cruiser. I don’t wanna smoke my transmission. Or do you recommend I figure out that vac setup? Here’s pictures or what I...
  4. J

    Oil Pressure Gauge Diagnostics

    No but I bought another sender and had the same reading. I sold the motor with the old one unfortunately otherwise I would’ve checked it.
  5. J

    Oil Pressure Gauge Diagnostics

    I’m having a similar issue. I swapped the 305 out on my 84 k5 blazer and at startup I get like 15 psi or so and goes to 0 at idle after warm. Tried an external oil pressure tester and got 52 cold and 26 or so warm at idle. I bought a whole another cluster to swap it and it was exactly the same...
  6. J

    700R4 Lockup Torque converter control issues solved

    Sorry to go off an old thread but this relates a lot to what I’m doing. I have a 84 k5 blazer that I just put a 350 in and had my 700r4 rebuilt. I removed all the old vaccine stuff to simplify under the hood but looks like I have the same vacuum piece on the firewall and I have 3 wires on the...

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