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  1. NickTransmissions

    1986 sbc th350 ran dry on ATF :o

    Yank it for overhaul; replace both one-way clutch assemblies in addition to frictions, steels, coast band. If you have no forward movment in Drive, 2 or manual low, the low roller clutch may have failed. Also install a Sonnax HD outer sprag race (goes on the direct drum).
  2. NickTransmissions

    700R4 Information Thread

    Good question, unfortunately I'm not sure as you're really asking an 'electrical' question as opposed to a transmission question and I'm a fish out of water when it comes to electrical!
  3. NickTransmissions

    1986 sbc th350 ran dry on ATF :o

    1. Fwd clutch and/or rear roller clutch assembly has failed; reverse uses the low reverse clutch and direct clutch to work 2. Perhaps was underfilled to begin with; try topping it off to see if anything happens in Drive/2/Low 3. See #2. If it doesnt work, yank it out for overhaul. Likely needs...
  4. NickTransmissions

    700r4 slipping in cold weather

    Again, what are the results of your pressure testing? Stop guessing and do a pressure test so you know exactly where you stand. Let us know the results whenever you have them.
  5. NickTransmissions

    700r4 slipping in cold weather

    What are the results of your pressure test?
  6. NickTransmissions

    700r4 slipping in cold weather

    You just bought it? If so, I'm willing to bet that thing was on it's way out for some time and the prev owner poured a barrel full of lube guard stop slip to make it work long enough to survive any test drives prospective buyers may take with it...This assumes you dont know the previous owner...
  7. NickTransmissions

    700R4 Information Thread

    Agree, I'm not a fan of TCC apply strategies that include lock up in earlier gears...I'd prefer it to lock in fourth only but GM engineers where trying to squeeze every last ounce of fuel economy out of those cars/trucks back then...They repeated the same strategy with the six speeds...The 6L...
  8. NickTransmissions

    Engine Swap Transmission Selection

    Treat all used transmissions as rebuildable cores; dont pay any more than $200.00 for a core. If going to the pick and pull, tear down the transmission so you can see if it's ok to rebuild on or damaged goods (broken hard parts).
  9. NickTransmissions

    700R4 Information Thread

    1982-E84, many 700R4s had a TCC apply strategy that included 2nd gear. You can tell, broadly speaking, how the trans was set up by counting the number of pressure switches on the valve body. While there were some variances over the course of the 700R4's production lifecycle, generally speaking...
  10. NickTransmissions

    700R4 Information Thread

    Type F is a Ford formulation. Has slightly different friction modifiers compared to the Dextron stuff.
  11. NickTransmissions

    700R4 Information Thread

    I think it is; if so, it should yield slightly firmer shifts using clutches/bands designed for Dextron, as he mentioned...
  12. NickTransmissions

    700R4 Information Thread

    Loss of fourth gear / falling out of fourth can indicate burning/heavily stressed 3-4 clutch pack. Fluid-wise, you can use DexMerc, Dex6 or Dex Multi-blend fluid. Ive never used Mercon V, which is for Ford units but cant say it's bad/harmful... Do a line pressure test and let us know the...
  13. NickTransmissions

    Engine Swap Transmission Selection

    I made a video showing all the tools I use to build 700R4s and 4L60Es; there isnt too many special tools... My 4L60E playlist has several tear down and inspection as well as reassembly step by step vids. If you do decide to rebuild it yourself, purchase the ATSG manual for those...
  14. NickTransmissions

    700R4 Information Thread

    Test at operating temp as colder fluid may throw inaccurate readings. Yes, min and full TV at 1000 RPMs....You should see fast and/or instant line pressure rise going from minimum to full TV on the cable. If you don't see any line rise, you'll need to begin the trouble shooting process - we'll...
  15. NickTransmissions

    700R4 Information Thread

    @1979 K10 - Factory lock up strategy for your year/model has the TC clutch applied in 3rd and 4th gear however if someone modified the lock up via a toggle switch, I suspect they intended for it to activate the TCC in 4th gear only and only when they flip the switch...So if that's the case (you...
  16. NickTransmissions

    700R4 Information Thread

    No vacuum lines should be going to the transmission as the 700R4s use a throttle valve system to manage/regulate line pressure inside the unit whereas the previous generations of transmissions (TH350/400, etc) used vacuum modulation for the same purpose. Based on your description of it's shift...
  17. NickTransmissions

    Engine Swap Transmission Selection

    #2. Or rebuild it yourself. See my 4L60E Information thread, page one for video instruction, parts lists, tech resources. Then jump to the very last page, most recent post for a video I published on all the tools/equipment you'll need. It would be criminally insane to pursue #3 if the...
  18. NickTransmissions

    4L60E Information Thread (Includes 4L65/70/75)

    Bumping this thread up with another 4L60E video. This one focuses on all the tools, supplies and equipment you'll want to have on hand to rebuild 700R4 and 4L60E transmissions...A great resource for anyone strongly thinking to take on this job! Enjoy and TIA for watching!
  19. NickTransmissions

    TH350 Cooler Lines

    Visit your local pick-and-pull junk yards...Bring a can of brake cleaner with you to flush the lines on the spot - that way you can determine if they're clogged up or not and clean/ready them for installation...
  20. NickTransmissions

    1978 chevy 350 issue

    Take the rocker arms, push rods and lifters out and inspect the cam lobes to see if they're wiped. You can also inspect the lifters, push rods and rockers at this time as well. Do it now while it's still on the stand and easy to work on...Let us know what you find.
  21. NickTransmissions

    Knocking noise in D and R after high revs

    Awesome, man! Great to hear you'll be taking transmission building classes...You can get ahead in your studies, if you'd like by checking out my TH400 Information Thread, if you haven't already seen it. I have compiled quite a lot of info there, would be a good resource for you.
  22. NickTransmissions

    Knocking noise in D and R after high revs

    You're welcome...given the converter came loose, you will want to inspect your Th400's front pump and bushing/seal once the engine and trans are both out. In fact, I'd overhaul the transmission completely if it hasn't been rebuilt in the recent past. This would be good to do especially if the...
  23. NickTransmissions

    Knocking noise in D and R after high revs

    That's the correct spec, I believe. Some blue loctite on each bolt also helps. If they come loose again, replace the bolts & put blue loctite on the new ones. Also check the crank itself for any irregularites in that event. If they come loose a third time, either helicoil the converter threads...
  24. NickTransmissions

    Knocking noise in D and R after high revs

    How tight in terms of lb ft did you torque the bolts? Did you inspect the threads at each mounting pad on the converter?
  25. NickTransmissions

    Knocking noise in D and R after high revs

    Maybe one or more of your TC-flexplate bolts has come loose. Whatever it is, fix it and let us know if you still hear/feel the knocking.

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