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  1. NickTransmissions

    700R4 Information Thread

    Lol! Any 4L60E is going to be better simply owing to the fact you don't have to deal with the throttle valve system found in the 700R4s. But as far as case internals are concerned, the 1988+ 700R4s and 93-96 4L60Es are identical. You don't see any daylight between them until 1997 when GM...
  2. NickTransmissions

    700R4 Information Thread

    Happy New Year, @Royal Sierra 454! Sounds great. For year, look at the case above the servo bore for a large upside down 'U' shaped crease. That indicates a 1988-1993 700R4. 82-87 Lack that crease. Then look at the passenger side rear of the transmission, just above the pan for a...
  3. NickTransmissions

    I’m interested in swapping out the TH350 for a 700R4

    Ok, you're good...One commonly overlooked aspect of doing these swaps is the gear ratio. Many have a very tall a gear ratio and dont upgrade to a deeper one before swapping in the OD trans. They then wonder why the OD trans keeps slipping when trying to accelerate in 4th gear.
  4. NickTransmissions

    I’m interested in swapping out the TH350 for a 700R4

    What's your truck's current final drive ratio?
  5. NickTransmissions

    Turbo350 w/shift kit slamming 2nd gear

    Rick, I'm assuming you meant to type "can't get"with respect to different tension 1-2 acc springs? If so, that is correct to the best of my knowledge
  6. NickTransmissions

    Turbo350 w/shift kit slamming 2nd gear

    Yep, Transgo starts out a good bit smaller in diameter for the 1-2 and 2-3 orifices compared to B&M so folks can 'work up' gradually...I like to direct people new to the process to Transgo's info as it let's them get to their final hole sizing while reducing the likelihood they'll go too far and...
  7. NickTransmissions

    Turbo350 w/shift kit slamming 2nd gear

    Simple - drill the feed holes out.... The art vs science is knowing how much to drill each. You first have to take a variety of factors into consideration (and ill make this specific to the TH350)....They are as follows: 1. Vehicle application 2. Final Drive ratio 3. Converter Stall (perhaps...
  8. NickTransmissions

    Turbo350 w/shift kit slamming 2nd gear

    Compare the instructions for each shift kit as it pertains to clutch feed hole sizes and you'll understand. It may also occur to you why spending money on shift kits for these transmissions is a waste to begin with, especially if you're rebuilding the transmission
  9. NickTransmissions

    Turbo350 w/shift kit slamming 2nd gear

    Nice job, Keith and you're very welcome! Now you know the relationship between that spring and piston and shift feel insofar as the 1-2 shift is concerned in the TH350, and to a great extent, same for the 2-3 and similar in pretty much every other GM transmission that uses a similar...
  10. NickTransmissions

    Turbo350 w/shift kit slamming 2nd gear

    No, sorry - i wasnt referring to you questioning me...i generally advise against leaving the 1-2 acc piston out when converter stall and trans are stock out for two reasons: 1. The delta in shift firmness with it removed is usually too aggressive, esp in a lighter weight vehicle (ie Nova)...
  11. 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...
  12. 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"...
  13. 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...
  14. 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...
  15. NickTransmissions

    454 460 horsepower swap into a 1987 V10 with 700r4

    You're welcome, man. I'm sure that 502 sounds beastly!
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...
  21. 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...
  22. 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...
  23. 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...
  24. 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...
  25. 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...

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