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  1. NickTransmissions

    Transmission Upgrade?

    4l80e and stand alone controller
  2. NickTransmissions

    700r4 speedo port not spinning at all.

    Maybe - not sure to be honest...You'll have to research that question or maybe someone else will respond to confirm/deny
  3. NickTransmissions

    700r4 speedo port not spinning at all.

    yep, those parts will work.
  4. NickTransmissions

    700r4 speedo port not spinning at all.

    Little port thing? Lol, are you working on a boat? Kidding aside, simply remove the speedometer housing w/ driven gear and seal (dont lose the little retaining ring) then install the new driven gear, replace the seal if it hasnt been replaced already then bolt the assembly back in place in the...
  5. NickTransmissions

    700R4 Information Thread

    Go to Pick-a-Parts and start looking at GM Squarbody trucks in the yard, particularly at the trans cross members and relationship to the frames. Maybe take one that looks 'correct' loose to see how it would sit/set up prior to being bolted back in place. What you're trying to determine is if...
  6. NickTransmissions

    700R4 Information Thread

    Don't trash those early cores, simply converter them to the L84-87 standard via swapping in a '152' input drum (30 spline) and 303/304 pump cover and body assembly (non-aux valve body style pump). Install the updated 29-element input sprag gear assembly, 4L60E forward wave/cushion plate, coast...
  7. NickTransmissions

    700R4 Information Thread

    Any Dex/Merc certified fluid will do. Dex VI is said to be backwards compatible but not necessary.
  8. NickTransmissions

    700R4 Information Thread

    Mechanical lock up applies in 4th gear only as far as I know. The Superior Tech kit comes with five or six different lock up springs; the stiffest spring will provide the latest lock up road speed. You will likely need to use the Transgo 700P spacer plate and follow their instructions for set...
  9. NickTransmissions

    700r4 speedo port not spinning at all.

    I don't see why not as long as the material you'll be using is sufficiently strong for how it's going to be used and you have the "program" for each gear.
  10. NickTransmissions

    700R4 Information Thread

    Very cool recollection...Do you remember installing, adjusting a TV cable? If not or one was never installed, it's a good bet that a CP valve body was involved. Also, the fact it lasted only 20k miles lends more credence to one being on that trans since that's about how long they typically last...
  11. NickTransmissions

    700r4 speedo port not spinning at all.

    Many times? As in, not ALL THE TIME? If it takes you several times to count the number of teeth, you're doing something wrong. Take a sharpie, mark one of the teeth then start counting. Stop when you get to the marked tooth. That works all the time. If the gear is 100% stripped then tooth...
  12. NickTransmissions

    700R4 downshifting at any speed

    You're welcome...if you're readings are within the ranges they should be then gov is the next thing id look at followed by valve body but dont mess with anything else until we see your line pressure readings...
  13. NickTransmissions

    700R4 downshifting at any speed

    Let me know your readings at min and full TV then we'll go from there.
  14. NickTransmissions

    700R4 downshifting at any speed

    Easy - go get a transmission pressure gauge and follow these instructions (start on page 11): https://images.carid.com/bm/transmission-and-drivetrain/pdf/70235-installation-instructions.pdf
  15. NickTransmissions

    700R4 downshifting at any speed

    Did you verify your adjustment via line pressure testing?
  16. NickTransmissions

    700R4 downshifting at any speed

    How do you know the cable is adjusted correctly?
  17. NickTransmissions

    TH400 SWAP HELP

    Yep that is a TH400, not a Th475...That said, it may have 6 clutches in the direct drum and 5 in the forward, which was pretty standard fare for Motor Home/Box Truck/School Bus applications. You likely have helical gears, not the straight cut but that's not a big deal. Good luck with the project.
  18. NickTransmissions

    TH400 SWAP HELP

    No clue if you need the linkage either but you will know one way or another once you install it. I'd start by swapping the U-shaped braket from your 700R4 to your TH400. You'll need to run a wire and connector for the TH400's detent solenoid, otherwise you may have upshifting or downshifting...
  19. NickTransmissions

    TH400 Information Thread

    Yep, they did or at least the clutch pack config was the same across the Chevy/Pontic vs Olds and HP Buick turbo 400s; many of those VBs had no spring in the 1-2 acc reg valve, no lip seal in the forward drum along with no wave in the direct, as you mentioned. Most had 12 springs in the int...
  20. NickTransmissions

    TH400 Information Thread

    Hey Bob - some of the HD and HP TH400s/475s had 6 frictions and steels in the direct clutch along with 5/5 in the forward...Post 73, they used stamped steel apply pistons with selective apply rings so it's very easy to fit an additional friction and steel by swapping out apply rings to short...
  21. NickTransmissions

    TH400 Information Thread

    Like mentioned above, use blue Loctite and torque to 35-40 ft lbs, though I'd replace those particular bolts with a set from ARP, given that they were loose across multiple drive cycles. The ARP bolts take 50 ft lbs when using their fastener assembly lube.
  22. NickTransmissions

    700R4 Information Thread

    You can convert either style into a 'constant pressure VB' but unless you're drag racing, it's not recommended...Having the VB generating 175PSI full time is extremely hard on the pump, results in extremely harsh shifts, especially the 1-2 shift and usually results in premature pump failure in...
  23. NickTransmissions

    700r4 speedo port not spinning at all.

  24. NickTransmissions

    700r4 speedo port not spinning at all.

    I was wrong - you do need more than one guess, haha.
  25. NickTransmissions

    700r4 speedo port not spinning at all.

    I'll give you three guesses as to why but you'll only need one...

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