1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Th400 Governor Weights

Discussion in 'Transmission & Transfer Case' started by Frankenchevy, Oct 19, 2019.

  1. Frankenchevy

    Frankenchevy . Supporting Member

    Posts:
    3,145
    Likes Received:
    2,482
    Joined:
    Jan 3, 2018
    Location:
    usa
    First Name:
    Jeremy
    Truck Year:
    old
    Truck Model:
    pickup
    Engine Size:
    8 cylinder
    Did a full throttle pull from a stop for the first time with my current setup. The TH400 shifts a little above 3000 rpm unless I manually shift through the gears. This makes sense, since it was originally behind a 6.2 diesel. There’s a TCI kit that comes with a variety of weights and springs. Lighter weights equals higher shift points. I’ve read a couple of things that most people end up using their factory springs with lighter weights.

    My question is, can I just shave my existing weights to achieve the same result?

    I was looking at this kit:
    ADA37FB5-4277-45ED-8B5B-FFAAFE1A72F0.png
    https://www.summitracing.com/parts/tci-326500/
     
  2. Frankenchevy

    Frankenchevy . Supporting Member

    Posts:
    3,145
    Likes Received:
    2,482
    Joined:
    Jan 3, 2018
    Location:
    usa
    First Name:
    Jeremy
    Truck Year:
    old
    Truck Model:
    pickup
    Engine Size:
    8 cylinder
    Bump
     
    HotRodPC likes this.
  3. bucket

    bucket Super Moderator Staff Member

    Age:
    37
    Posts:
    19,649
    Likes Received:
    4,518
    Joined:
    Aug 3, 2010
    Location:
    Usually not in Ohio
    First Name:
    Andy
    Truck Year:
    '77, '78, '79, '84, '88
    Truck Model:
    K5 thru K30
    Engine Size:
    350-454
    HotRodPC likes this.
  4. JoeR Jr

    JoeR Jr Full Access Member

    Posts:
    70
    Likes Received:
    53
    Joined:
    Jun 23, 2018
    Location:
    Stokesdale, NC
    First Name:
    Joe
    Truck Year:
    1986
    Truck Model:
    C10
    Engine Size:
    4.3
    I've never tried it, but it makes sense that will will lower governor pressure. Maybe try drilling holes instead of grinding. It's free to try, so give it a go. i'd be extra careful to not introduce any shavings or grinding materials into the trans.
    Joe
     
    Frankenchevy likes this.
  5. Frankenchevy

    Frankenchevy . Supporting Member

    Posts:
    3,145
    Likes Received:
    2,482
    Joined:
    Jan 3, 2018
    Location:
    usa
    First Name:
    Jeremy
    Truck Year:
    old
    Truck Model:
    pickup
    Engine Size:
    8 cylinder
    I thought about drilling rather than grinding right after I posted. I planned on performing the weight reduction procedure with the weights removed. Never actually been into the governor before. Any pointers?
     
  6. HotRodPC

    HotRodPC Administrator Staff Member

    Posts:
    44,462
    Likes Received:
    4,205
    Joined:
    Aug 29, 2010
    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    Damn, $92 for weights? F That. So you need a Gas Th400 Governor? I probably have 5 or 6 laying around. How much can USPS Priority Shipping Be? PayPal friend me the shipping and I'll send you a Gas Th400 Governor if it'll fit in the small Flat Rate Box and whatever else small parts you might need that'll fit in the box too. Don't spend no ridiculous money on a Governor, we got this handled.

    The other thing you can try to delay the shift a bit, is turn the screw IN and tighten up the spring on the Vac Modulator.
     
    Frankenchevy likes this.
  7. HotRodPC

    HotRodPC Administrator Staff Member

    Posts:
    44,462
    Likes Received:
    4,205
    Joined:
    Aug 29, 2010
    Location:
    OKC, OK
    First Name:
    HotRod
    Truck Year:
    85
    Truck Model:
    Silverado K10 to K20 Conversion
    Engine Size:
    6.2 to Gas???
    Thanks for the Bump @Frankenchevy and tag @bucket. We don't like threads not getting attention and getting ignored. That's not what we do here. Sometimes it does take teamwork though.
     
    Frankenchevy likes this.
  8. 71RAT

    71RAT Full Access Member

    Posts:
    84
    Likes Received:
    49
    Joined:
    Jan 11, 2019
    Location:
    Deerfield NH
    First Name:
    Kirk
    Truck Year:
    1983
    Truck Model:
    K20 Scottsdale
    Engine Size:
    461
    You can grind or drill you weights. I've just been working on the governor in my Chevelle, close but not there yet. If you look around the Superior kit can be had for around $50, I think. Probably hunt down a lighter gas governor if you don't buy a kit. I agree $92.00 is way to much! If you have an adjustable modulator don't turn it in more than 2 or 3 turns.
     
    Frankenchevy likes this.
  9. Frankenchevy

    Frankenchevy . Supporting Member

    Posts:
    3,145
    Likes Received:
    2,482
    Joined:
    Jan 3, 2018
    Location:
    usa
    First Name:
    Jeremy
    Truck Year:
    old
    Truck Model:
    pickup
    Engine Size:
    8 cylinder
  10. SquareRoot

    SquareRoot Full Access Member

    Posts:
    371
    Likes Received:
    316
    Joined:
    Mar 18, 2017
    Location:
    Arizona
    First Name:
    Mike
    Truck Year:
    85
    Truck Model:
    K20
    Engine Size:
    350
    Why? How would you know where you're starting from? Turn it all the way out, and then only go back in 2-3 turns?
    Thanks
     
  11. 71RAT

    71RAT Full Access Member

    Posts:
    84
    Likes Received:
    49
    Joined:
    Jan 11, 2019
    Location:
    Deerfield NH
    First Name:
    Kirk
    Truck Year:
    1983
    Truck Model:
    K20 Scottsdale
    Engine Size:
    461
    Thats why I said 2-3. Most of the modulators when new the screw is about flush with the end of the nipple. It verys with brands. If it's in close to .250" that's about it. Just tried on an old modulator. guess the bottom line is If you have to adjust it that much you need to be working on the governer first.
     

Share This Page