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  1. NickTransmissions

    4l80e conversion in 1985 suburban. What parts do I need?

    Looks nifty.
  2. NickTransmissions

    4l80e conversion in 1985 suburban. What parts do I need?

    Looks nifty. So the mechanical side of the box uses a cable to connect it to your dash while an electrical cable goes from the other side of the box to the VSS? The box then converts the VSS voltage vehicle speed signal to a mechanical output to the speedometer in your dash's gauge cluster?
  3. NickTransmissions

    4l80e conversion in 1985 suburban. What parts do I need?

    Please tell me you're joking...I'll buy that. Why do you need to keep the mechanical speedometer? You're much better off simply putting your cell phone in a holder on the dash or windshield somewhere, bringing up the app Waze and using that as your speed indicator. You can also run a Dakota...
  4. NickTransmissions

    700R4 Transmission Questions/Issues

    Perform a line pressure test - see my 700R4 Information Thread on how to do this. You're flying blind without knowing where your baseline transmission pressures are at the current TV set up and adjustment. If your line pressures are within spec, drop the pan and see what's at the bottom...If...
  5. NickTransmissions

    TH400 Information Thread

    Id outsource the bushing R/R to a shop...Alternatively there is a dedicated Kent Moore branded bushing service set, J-21465-01 for TH400s available on eBay from time to time. It's not cheap but will allow you to r/r all the bushings. Get a Th350 pump bearing and a couple shims (.010, .015) for...
  6. NickTransmissions

    Tv cable

    It makes too much sense for people asking for help to give all the relevant information to make it easier for other members (members who are taking the time to volunteer their knowledge, assistance and experience for NOTHING) to more efficiently and effectively help the requesting party. I'll...
  7. NickTransmissions

    Buying a rebuilt transmission th350

    Nice work, @Craig Nedrow !
  8. NickTransmissions

    700R4 Information Thread

    You're welcome, man...Sometimes the valve body is no good but there's no clearly identifiable reason...I am working on designing a vacuum test plate for those 700R4 VBs so that they can be thoroughly tested and weaknesses identified before bolting them back on...
  9. NickTransmissions

    700R4 Information Thread

    To be clear, you have NO 3-4 upshift? If so, check the 4th gear servo piston's scarf cut sealing ring - it's on the inside of the servo cover. If that's in good shape, drop the pan, VB and see if any valves are sticking (3-4 throttle valve/spring/sleeve and 3-4 shift valve, 3-4 relay valve...
  10. NickTransmissions

    700R4 Information Thread

    Bumping this up with another video - this one showing the pump repair/ream job and installation/testing of the Sonnax oversized pressure regulator valve...The original valve was heavily worn and likely contributed to the myriad of drivability symptoms that plagued this unit while it was in the...
  11. NickTransmissions

    Buying a rebuilt transmission th350

    Don't know the answer to that until you post the build sheet so we can see what was installed. If it's a purely stock rebuild with none of the requisite updates that need to go into all TH350s upon overhaul, then yes - $750.00 is too high because you'll be into yours for less in parts once all...
  12. NickTransmissions

    Buying a rebuilt transmission th350

    I'd definitely rebuild your existing unit if the guy wants $750, unless he has paperwork showing exactly what was installed, all the parts that should have been installed were installed, when the work was performed and how many miles at the time of the rebuild as well as a means for you to...
  13. NickTransmissions

    Buying a rebuilt transmission th350

    How would anyone be able to answer that question if we don't know what you would be paying the seller for this other unit?
  14. NickTransmissions

    350 TRANSMISSION SPEEDOMETER GEAR HOUSING

    Pull off the extension housing then remove it from the inside.
  15. NickTransmissions

    700R4 Information Thread

    Hey All, bumping up the thread with a video on the "Nemesis" Rebuild profile ... This will be the first in a series of vids capturing the build-up...I'll post here as each gets published to my YT channel. Enjoy and TIA for watching!
  16. NickTransmissions

    please recommend a transmission dipstick that isn’t junk.

    I wish some of your local junk yards were present here in Vegas...All of our pick-a-parts have old stuff from the 70s, 80s and 90s plus early 00's...Anything after 2010 is largely non-existent in local pick yards...Would love to have access to later model vehicles for the transmissions...
  17. NickTransmissions

    700R4 Information Thread

    You need at least .040 to be on the safe side so get it however you need to get it. Your existing drum is prob warped but even if it's not, it's an inferior design. Those drums also had a lot of variability; I have had issues with them and clearance as well in the past. You can machine a step...
  18. NickTransmissions

    700R4 Information Thread

    I have identified the problem! Next step is placing that drum into the scrap bin and purchasing a new AC Delco rev input drum. Your current belleville plate, piston, return spring and clutch pack w/backing plate will all transfer over. That should solve your clearance problems and enable you to...
  19. NickTransmissions

    please recommend a transmission dipstick that isn’t junk.

    Go to the junkard and buy a good used OEM one out of a TH350 for $5-$10.
  20. NickTransmissions

    700R4 Information Thread

    Ha! They missed building the transmission at all, lol! I've only read a few positive things about his transmissions and had to search high and low to find them (maybe they were him or friends' accounts posting good things, who knows...) but yes, agree 100% on finding a local, trustworthy and...
  21. NickTransmissions

    700R4 Information Thread

    Yep, they are all alike in my experience, tearing down their rebuilds.
  22. NickTransmissions

    700R4 Information Thread

    I believe you're thinking of Mad Dog Transmissions in Atlanta...I believe the owner's name is Lou. I think he used to be at Monster then started his own company(ies). Sounds like he uses the same MO that all the large remanufacturing companies have adopted when it comes to post-purchase customer...
  23. NickTransmissions

    700 r4

    Only you can answer that for yourself. I feel it's easy but that's because Ive done it numerous times. Everything's relative...
  24. NickTransmissions

    700R4 Information Thread

    Bumping this thread with a 700R4 Teardown vid that I recently published...This one was a cluster...Long story short, a reman company sold my customer their 500hp 700R4 that they dubbed the 'Nemesis'...Needless today, it wasn't built for handling anywhere near that level... Enjoy!
  25. NickTransmissions

    700 r4

    Probably. Sounds like your band is shot (it's applied in 2nd and 4th gear. First check your governor - make sure the gear isnt stripped. If the governor is in good shape and gear is fine, drop the pan and see what's at the bottom. Lots of metal or burnt clutch material is found, put the pan...

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