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  1. Swearbody

    700r4

    Mine was rebuilt in 2016 by a local shop that does nothing but 700r4 and 4L60 rebuilds. They told me at the time that the 700r4 was so similar to the 4L60 ,and they are so common ;that they could afford to do just those 2 transmissions. It was $750 out the door. I guess what im saying is that...
  2. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    My truck has been modified enough that im not sure the factory setup would even function properly if it were all new parts. I have a cam thats right before needing a vac pump, a 2200+stall, 3.90 gearing. Im not completely sure how all of that ties in but im sure it changes the parameters GM used...
  3. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    I put the mighty vac on it today and there was about 3 seconds of delay. No need for a diagram...at this point ive had hands on all the external wires,LOL
  4. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    That may very well be the case. I did some digging today and found that if the pin "a" of the 4pin connector is interrupted then it only locks up in 4th...no more 2-3. I traced the wires and found no shorts externally. I also drove it with a toggle switch on the pin "a" wire and could get lockup...
  5. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    It has been traced to a likely short somewhere on the "a" pin or green wire. The short may be internal but a bypass has shown it to be a constant voltage to pin "A" of the 4pin connector. Trans has less than 5k on it. TV cable is new and recently adjusted. Trans temp and functionality are...
  6. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    SO to unwrap this a bit more.... I did a thing. I interrupted the pin "a" green wire of the 4pin connector with a toggle switch. When off it no longer locks in 2-3 but immediately after 3-4 shift it locks 4th. That lead me to believe you were right about the constant power short on 'A' pin...
  7. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    Yeah it helps. Im pretty sure ive got 3-4 lockup setup. I have the vac switch and delay valve,brake switch with no external 4th gear pressure switch. Its an 84 as well with no tcm,ecu etc. Pretty sure its 3 wire as well. I plan to mess with it tomorrow and see what else I can find. I cant find a...
  8. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    Is the vac delay valve the little check valve looking thing in line to the vac switch. How would i test that. I took it off and it seemed like air only went through it one way
  9. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    Right on. So one of them may be faulty or getting voltage it shouldn't
  10. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    Hey man good to hear from you!! Man I hope not. In all honesty I doubt thats my issue though unless it just the tcc itself.. Ive driven the truck hundreds of miles and the trans seems solid. Ive put it through its paces and it hasnt mis shifted, held or hesitated a shift (other than when the tv...
  11. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    Im in no shape to pull a pan yet otherwise id gladly do that. I can say it does not have a 4th gear external pressure switch like used on a monster trans kit. I dont know if the factory 4th gear switch you are referring to is internal or one you tap into externally. The trans was replaced by...
  12. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    Im still not understanding the stuck valve diagnosis. Perhaps its a difference in vernacular. To me stuck implies that it does not cycle function and since its already confirmed that the tcc disengages when brake is depressed or 4pin connector unplugged, I am failing to follow the "stuck"...
  13. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    TCC is functioning as per any info I have been given. It doesnt make any noise,it locks and unlocks...just not when i want it to. 3rd and 4th feel great though with my gearing I only need 4th to lock...but that has nothing to do with the tcc functionality but instead the signals being sent to...
  14. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    If im thinking about this right ,the fact that it unlocks when the brake is applied rules out stuck solenoid... right/wrong? Also it does not lock when 4pin is unhooked. Mine is acting more as you have stated your does when you forget to switch off...like it is manually locked. Perhaps the plug...
  15. Swearbody

    700r4 locking up in 2nd also locking too fast. Vac switch?

    SO as stated my 700r4 is locking up in 2nd and too early in 3rd-4th. I didnt even know they could lock up in 2nd. I havent been able to get to it since april due to being ill so i could have done something wrong hooking it all back up but im leaning towards other things. 1) it was unhooked when...
  16. Swearbody

    700r4 vacuum switch?

    Im doing the same thing today...what a coincidence. Mine is locking up immediately in 2nd. Im hoping its something simple like that vacuum switch being plumbed wrong.
  17. Swearbody

    How quick is your Square?

    According to my Dragy mine averages around 13.90 @ 96mph in the 1/4 but thats blowing the tires off through 2nd. Ive seen a 13.37 @ 101 out of it once on a prepped track. Mind you Im only running a 235 bfg tire. Hoping some proper compound 295s will get me into the low 13s. anything lower and...
  18. Swearbody

    What’s IT Worth? (Post all “what’s it worth threads here)

    Hey man thanks for the well wishes. I finished the truck just in time for shit to get real. Knew something was wrong for a bit while doing the work. I just was too tired and too sore to just be getting old,LOL Im gonna kick til I Kick it though. Im too stubborn to just roll over. Thank God I...
  19. Swearbody

    What’s IT Worth? (Post all “what’s it worth threads here)

    Ive owned 3 longbeds and 1 SB. The SB was a NOS drag truck but the longbeds are always my driver/tower. I was building this one to pull other toys. Now I have other priorities. If mine was a K i feel it would bring some serious $$$. Being a 2wd long bed with money poured into may still bring a...
  20. Swearbody

    What’s IT Worth? (Post all “what’s it worth threads here)

    Cancer and I arent getting along and I may have to sell my truck. Some of you may have kept up with the build and most have not so Hewre are the details. All work has been documented on my YouTube channel and receipts are available 1984 gmc longbed power windows and locks, interior in great...
  21. Swearbody

    700r4 speedometer adjustment after gear swap help

    Thanks Matt!! Thats the method and calculator I used to determine the 15-41 combo. I cant imagine why I didnt realize the speedo would change with a gear change. Thankfully its an "easy" fix,LOL.
  22. Swearbody

    700r4 speedometer adjustment after gear swap help

    IM basically just asking if anyone knows the drive and driven gears size. Im coming up with 15 and 41 for speedo gears. Thats having come from a 2.73 to a 3.90. I think I may also need a larger housing/sleeve for the drive gear on the output shaft too. So basically 15 driven 41 drive would be an...
  23. Swearbody

    700r4 speedometer adjustment after gear swap help

    First sorry for my absence from the forum as of late. I have stage 3 cancer and its been rough. fuck Cancer That being said I did finally get the Gears and Diff done. Went from 2.7x to 3.90 and now have a eaton truetrac. I just drove it for the first heat cycle and well damn...I didn't...
  24. Swearbody

    Under hood paint suggestion

    I was intending to have more of a satin finish to mine as well however it turned out shiny AF...Like vision blocking glare bright
  25. Swearbody

    What have you done to your square lately??

    3.90 ring and pinion, Eaton truetrac, and master bearing kit....check!!

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