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  1. NickTransmissions

    Turbo350 w/shift kit slamming 2nd gear

    Yes but it wont cause a neck-snapping, back breaking 1-2 shift that the OP is describing (slamming into gear). To your point, it can and sometimes will prevent upshift if it's not functioning as i mentioned in that post above. And I have no issues with someone questioning what I say but there's...
  2. NickTransmissions

    Turbo350 w/shift kit slamming 2nd gear

    Are you referring to me? None of what you suggested will fix his 1-2 shift and Dex 6 is totally unnecessary in a TH350, was engineered for later transmissions with different friction compositions which won't be applicable for these older units. The kick down cable controls, well "kick down"...
  3. NickTransmissions

    Turbo350 w/shift kit slamming 2nd gear

    Does your converter have a stock-level stall speed? If so, im not surprised that the 1-2 shift is super harsh as it was set up for that much higher 3500 stall. Check the 1-2 accumulator to see if the spring was omitted. If so, install a new spring and that should tame it. If the spring is...
  4. NickTransmissions

    454 460 horsepower swap into a 1987 V10 with 700r4

    If built correctly, the 700R4 can handle big block 454s assuming they aren't putting out more than about 550TQ...I know this for a fact as appx 10% of all my 700R4s have gone into big blocks and they've held up just fine...In stock form, I'd not recommend sticking a 700 behind one but my base...
  5. NickTransmissions

    454 460 horsepower swap into a 1987 V10 with 700r4

    You're welcome, man. I'm sure that 502 sounds beastly!
  6. NickTransmissions

    82 k1500 lost all forward gears no warning signs at all

    Check front end play by pushing and pulling on the input shaft...You should have a little bit of longitudinal movement - if not, do not install that trans as it's bound up internally due to incorrect selective pump thrust washer (older units) or excessive shimming on the pump thrust bearing...
  7. NickTransmissions

    454 460 horsepower swap into a 1987 V10 with 700r4

    If you have 33" tires you will prob want a deeper final drive ratio but that's assuming you actually have 3.08 and not 3.23 or 3.42. 3.73 would be ideal, IMO. Please quote my post or mention me if you want me to respond to any of your replies. I dont get notifications unless someone quotes or...
  8. NickTransmissions

    454 460 horsepower swap into a 1987 V10 with 700r4

    You're welcome on both counts. Final drive ratio has nothing to do with what engine is installed but has everything to do with its relationship with the overdrive gear ratio in the transmission. Too tall a final drive will bog the engine when in 4th and TCC lock up while providing insufficient...
  9. NickTransmissions

    454 460 horsepower swap into a 1987 V10 with 700r4

    Ive built plenty of 700R4s behind big blocks making around that much torque/power but he's near the upper limit, beyond which you could spend an infinite amount of money and still break the transmission in short order...a few main things have to be card for, hard part wise and hydraulics but, if...
  10. NickTransmissions

    454 460 horsepower swap into a 1987 V10 with 700r4

    Contact your cam manufacturer, let them know the particulars of your vehicle including final drive ratio, engine, transmission, Y,M,M vehicle and they will give you a stall speed range for that cam grind in context with the rest of your powertrain/drivetrain. Also, no need to write everything...
  11. NickTransmissions

    700R4 Information Thread

    Yep, there were 1993 model year 700R4s installed into Corvettes, Camaros, Firebirds / Trans Ams as well as Caprice and perhaps one or two other passenger car lines...The 1993 valve body takes 3 check balls - a third was added for reverse input. Those vehicles switched over to the 4L60Es starting...
  12. NickTransmissions

    TH400 Information Thread

    I believe some folks simply chop the 2WD shaft to the length they need and bolt on a 4WD extension housing that mates to whichever transfer case they're using and replace the rear case pin-hole seal on the rear of the transmission case with the 4x4 cup plug which can be done without tearing into...
  13. NickTransmissions

    700R4 Information Thread

    See my above - if you have an early 1984 unit with a 27 spline input shaft and '368' drum then you'll want to swap over to a '152' drum that has the 30-spline input shaft along with a corresponding L84-86 pump assembly. The 7 vane rotor is fine for most stock to mild applications but upgrading...
  14. NickTransmissions

    700R4 Information Thread

    The late 84-86 units are ok, they all have the wider input shaft w/30 splines but still need some 'modding'...All my 700R4s get 4L60E bonded steel/rubber pistons and corresponding return springs as well as 4L60E spec high energy clutches and .105 thick steels; those earlier pre-88 units are also...
  15. NickTransmissions

    700R4 Information Thread

    Thanks again, man. It is monetized however you are spot-on when it comes to the watch hours on smaller channels...My cousin has a channel w/50k subs and he told me his watch hours didn't start to shoot up until he hit about 15k or so and his channel is sports-related which typically would get...
  16. NickTransmissions

    TH400 Information Thread

    You're welcome, man -thanks for having me on the forum. And yes, Ron Sessions books on the TH350 and TH400 are the 'bibles' for those transmissions. I was lucky enough to spot a listing on eBay for both of those books several months back, seller only wanted $75.00 shipped so I jumped on it...A...
  17. NickTransmissions

    700R4 Information Thread

    Bumping this one up....Ive been seeing a lot of threads on 4L60E transmission replacement lately and know not everyone can afford to drop $1500-$3000 on a complete rebuild on short notice so are looking to the used transmission market as a stop gap solution. To that end, I decided to do a video...
  18. NickTransmissions

    FNG here that used the search bar…

    Yep, you certainly are. Ive rebuilt over 2000 700r4s. How many have you done? Dont bother answering, its a rehtorical questions...off to the ignore list you go.
  19. NickTransmissions

    FNG here that used the search bar…

    Yes it does...You'll generate a ton of heat without it. Ive seen enough of them and 200R4s come in where folks didnt install lock up kits and trans was scorched inside as a result. You can convert the trans to take a non-lock up converter via Transgo's conversion kit and simply install a...
  20. NickTransmissions

    FNG here that used the search bar…

    Yes it does, or trans overheating will be a fast follower. Th350Cs its not as critical. Yes - converter stall engine speed is irrelevant when it comes to whether or not the tcc is active and working. That said the higher the stall speed, the more heat generated all other things equal so make...
  21. NickTransmissions

    82 k1500 lost all forward gears no warning signs at all

    Its done...Yank it out, rebuild it. ETA: If you lost all movement suddenly and it was working fine in the preceding days/weeks, I'd guess your low roller clutch in the center support failed. Very common in the TH350
  22. NickTransmissions

    74 k10 going 55 mph is at 3,500 rpm

    Swap in a 700R4 and cruise at 70 mph/2000 rpms or so.
  23. NickTransmissions

    82 k1500 lost all forward gears no warning signs at all

    Yank it out, tear it down and inspect for hard part damage. Once cleaned up, grab two things to increase strength/mitigate two very common TH350 pattern failures at minimal cost: - 4L60E center support: Drops in with no mods and its low roller clutch is much less prone to failure - Sonnax HD...
  24. NickTransmissions

    91 burb runs terrible in reverse

    On a level grade with no vehicles or anything else behind you, throw it in reverse, keep foot off gas pedal. It should move in reverse on its own without any throttle input. If it doesnt or slips, the trans needs to come out. ETA: If you suspect a short to ground where the electrical system is...

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