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  1. NickTransmissions

    THM350C alternatives or keep it?

    3:23 is fine for a 700 trans, though the motor would wake up a bit with 3.73s, esp when paired with the 700R4's 3.08:1 first and .67:1 overdrive. Put a 2000-2200 stall tc (700R4) and it would make for a nice cruiser that can still get up and go when needed. All he'd need to do is move the x...
  2. NickTransmissions

    THM350C alternatives or keep it?

    The TH350C, if built appropriately, is fine for your application. Having TCC enabled will reduce heat somewhat and give a small boost in hwy gas mileage. Main things to do: 1. Sonnax HD intermediate outer sprag race 2. 4L60E center support (drops right in, no mods needed) 3. Sonnax boost...
  3. NickTransmissions

    Odd delay going into gear

    Not sure when @dkraven is going to log back on but will post my diag recommended sequence for anyone else with the same problem who happens upon this thread (note - may not be 100% exhaustive): 1. Check fluid level on a level grade when engine/trans are at operating temp - if fluid is low, top...
  4. NickTransmissions

    Odd delay going into gear

    Check fluid level on a level grade at operating temp. Let us know...
  5. NickTransmissions

    3-4 harsh shift 4l80e

    So the problem was a bad maf? If so, im not surprised. They cause all kinds of problems with transmissions when breaking bad. Check the apply strategy tables to see when the TCC is supposed to be locking. Some have the tcc come on at WOT in 2nd to mitigate slip-driven heat build up but it...
  6. NickTransmissions

    Th350 spews fluid

    That could be; wrong dipstick leading to inaccurate fluid level reading, etc. I believe they have different part numbers so may be worth looking up the part numbers on Rock Auto to see if you can cross ref yours against what you see. I use brake cleaner on the lines and cooler but i think...
  7. NickTransmissions

    Th350 spews fluid

    Something is forcing fluid out, it's usually one of two things (high level): 1. Fluid is overfilled by at least a quart or under-filled by a couple quarts and remaining fluid is super heated causing gas-pressure driven venting at the base of the bell housing 2. There's a restriction somewhere...
  8. NickTransmissions

    Performance 700r4 rebuild

    That looks great, excellent job and presentation of the build progression! Can't wait to hear the test drive report! And thank you for the kind words above, glad my videos were helpful.
  9. NickTransmissions

    Need help with my 700r4

    Your 3-4 pack is likely wasted; as @Ricko1966 said, it's time for a performance-oriented overhaul. You can perform a pressure test to see if the TV/detent cable is set up and adjusted correctly. Id also confirm your bracket is giving you the correct TV cable geometry if the carb that's installed...
  10. NickTransmissions

    Performance 700r4 rebuild

    They work well and keep the plate from wearing out at the check ball seating locations...I don't see plate wear as much with the 700R4s as I do the 4L60Es but Torlon is still a good way to go.
  11. NickTransmissions

    700r4

    Here's how I would have written your original post, with the link to the thread you were referring to: ---------------- In a previous thread (see link below), I discussed the possibility of changing my gears to something that would bring my engine RPMs down on the highway. I am also thinking of...
  12. NickTransmissions

    Performance 700r4 rebuild

    Yes, if you go .155 on the 2-3 feed, you want to increase the diameter of the band release relative to your change to the 2-3 feed orifice...Whether you do that now or later is up to you; factor in the proportions of time the vehicle will see the street vs the strip (or driven as if it was at...
  13. NickTransmissions

    Performance 700r4 rebuild

    @Wumbo Looks like a good start; you may find the 2-3 feed is a little soft at WOT but I'd keep everything as-is for now as it's easier to remove more material later than add it back in (i.e. buy a new plate or peen the hole shut then resize it). Are you: 1. Blocking the 4th accumulator? 2...
  14. NickTransmissions

    TH400 Direct Drum/Sprag Question

    Order a standard vacuum modulator for a TH400 from any transmission parts supply shop or buy from a local trans parts supplier.
  15. NickTransmissions

    700r4

    What previous post? Maybe link it to make it easy for folks to grab the context... You need to provide a lot more info to get meaningful respones. Let's start with year, drivetrain type, intended application/usage pattern, engine power and go from there...
  16. NickTransmissions

    4L80 on FB Market Place

    Thanks, Craig!! I may go to the junk yard today to look for another one...Assuming I pull it, the yard sells those for $225.00 out the door w/sales tax...I typically disassemble them in the yard to make sure all hard parts are good, then slap it back together before I pay for it.
  17. NickTransmissions

    4L80 on FB Market Place

    I grabbed this clean 2000 MY Goodwrench 4L80E from my hard parts supplier for $400, also a solid price relative to the going 'core' rate around here.
  18. NickTransmissions

    4L80E W.O.T. 2nd gear up shift

    Assuming it's not a controller/electrical/electronic issue, the problem sounds like either a minor cross leak in the 2nd gear circuit or the 1-2 shift feed orifice isn't large enough given what you're trying to do, engine power, cam profile, rear gears and converter stall. I'd also wonder if the...
  19. NickTransmissions

    TH400 Direct Drum/Sprag Question

    Use a 3/8" cup plug, red loctite around the OD. These should be available online. That portion of the dual feed process where i install the cup plug should be in PT3 of the "4L80E high performance" video series (yellow transmission). If the bearings are in good shape it's fine to reuse unless...
  20. NickTransmissions

    TH400 Direct Drum/Sprag Question

    Yes, always - unless bushing kits are not available for a given unit (ie FMX, last time I checked). You wont have that particular issue with the GM long. 3 speeds like the TH400. They are hard on bushings, always replace the existing ones. Drive the rear case bushing in from the rear so it's...
  21. NickTransmissions

    I added dex 6 to dex 3. Was that dumb?

    Dex 6 is backwards compatible with anything that took Dex3 so should be fine...
  22. NickTransmissions

    TH400 Direct Drum/Sprag Question

    Never ever reuse frictions if going back through a transmission, that's flate rate tactics....Flat rate shops fix only what has already failed, leaving everything else in, regardless of wear, so that the other comsumables fail shortly after their 30-90 day warranty expires. This puts the...
  23. NickTransmissions

    TH400 Direct Drum/Sprag Question

    I cant remember what i used in that video but if you can locate the bearing using the TH400 rear case bushing then roll with it. I may have been thinking of the 4L80E rear case bushing in my initial reply as that bushing is much narrower than the pump body bushing. FYI - quote my posts or...
  24. NickTransmissions

    TH400 Direct Drum/Sprag Question

    No, do not do that. Buy the early 4L80E pump body bushing. Those bushings are cheap, dont worry about any bushings you may already have, just set aside... I linked the set on ebay above (click on the link in bold) - it's pricey but will allow you to install all the bushings correctly with...
  25. NickTransmissions

    TH400 Direct Drum/Sprag Question

    You're welcome. I use a bushing driver for that size bushing from the Kent Moore TH400 bushing R/R set...I wouldn't recommend using sockets for them as you you'll likely ruin the bushing...Check out my TH400 bushing installation video for tips/pointer when it comes to bushing installation...If...

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