ST300 Rebuild

Discussion in 'The "Juice Box"' started by Gulfgears, Dec 18, 2021.

  1. Gulfgears

    Gulfgears Gulfgears

    Transmission in my 66 started to act like it was slipping, so I had the adjustment on the outside of the transmission tightened up per specs in manual. Still slipping.
    Mechanic friend said once it starts slipping its time for a rebuild,
    Went to a local shop and was quoted $4,000.00 for a rebuild. Lost my mind, told him if he didn't want the business just to say so, not something as ridiculous as a $4,000.00 quote without even looking at the car.

    So my options are reduced by one now.

    My son found a shop over in Mississippi run by a father and son that may be able to do the work, Father is older and knows old cars
    So, I now need to know where is a good source for all the parts necessary for the rebuild, clutches, seals etc?
    The shop we are looking at said to have all the hard parts in hand before they start the job.
    Any help would be appreciated
     
  2. TrunkMonkey

    TrunkMonkey Totally bananas

    Here are a few sources.

    First one (Oregon) has all the parts including the band, filter, modulator and steels.
    Second (ClassicBuicks) has separate listings for some parts.

    Third (transmissionpartsdistributors) has seals, gaskets VB plate and clutches.

    Last (tpocr) has individual parts, hard parts. Pump is most important if yours is out of spec. Otherwise, just new gears and properly dress pump mating surfaces.

    https://www.oregonperformancetransmission.com/product/OPT-ST300-RB.html

    https://classicbuicks.com/shop/tran...ssion-overhaul-kits/super-turbine-300-st-300/

    https://www.transmissionpartsdistri...ction-clutches-fits-64-69-buick-olds-pontiac/


    https://www.tpocr.com/firebirdST300parts.html

    If you commit to this, check with the sources I listed to see if all the parts are available, and have the shop do a teardown and inspection to see what is actually needed.

    Otherwise you may buy parts you do not need, or find the ones you do are listed on a site, but not actually available.

    This will save you from the possibility of the job getting pushed aside and taking forever to get finished, costing more than you thought at first, or worse, a shop closing, or your parts getting lost.

    I wish I was not in the middle of moving halfway across the country, or I would be happy to help with this.
     
    Last edited: Dec 18, 2021
    ssmock likes this.
  3. BrunoD

    BrunoD Looking for Fast Eddie

    If it all fails.I have a 400 SP trans,already rebuilt by my local trains guy.If interested,PM me.Bruno.
     
    sean Buick 76 likes this.
  4. BRUCE ROE

    BRUCE ROE Well-Known Member

    Same here, any failing 2 speed got replaced by a cheap, tough, better
    performing, readily available TH400. Bruce Roe
     
  5. Waterboy

    Waterboy Mullet Mafia since 6/20

    Dang Gary, that is flat out ridiculous. My son has a ST300 in his 68 Skylark. He blew it up and we brought it to our transmission guy. He took it apart and said, well you certainly burned this one up really well! In my shed I had another one from a car I stripped down years ago. (I believe it is a 5 clutch instead of 4 clutch?) Our transmission guy rebuilt it for $300 plus parts that he got locally. My son also added in a 3000 stall converter. That sucker is a blast, and it was cheap. There has to be someone that can do you a deal. Hopefully the shop your son found.
     
  6. philbquick

    philbquick Founders Club Member

    Watch a U-Tube and do it your self.
     
  7. sean Buick 76

    sean Buick 76 Buick Nut

    I would swap in a th-350 or 2004R
     
  8. Gulfgears

    Gulfgears Gulfgears

    Bruno, thanks for the offer. I'm dealing with non-buick people so i need to know if a 400 is a bolt in for the 200? Also, guess I'm a little slow but I havent figures out the PM business, did it once, but can't remember how, so send me a pm with price and estimated shipping to 70435 with torque converter. And, this is not a rush job.
     
  9. Gulfgears

    Gulfgears Gulfgears

    Not in my skillset. Automatic transmissions are best repaired by those in the "black arts" as no normal person could ever figure out how they work. Guys who repair the automatics have always had my respect!
     
  10. Gulfgears

    Gulfgears Gulfgears

    Again, I have to outsource this to a shop and I'm fairly sure they don' want to be bothered with all the kickdown and carb linkage issues associated with either of these transmissions.
     
  11. Gulfgears

    Gulfgears Gulfgears

    Retry, can' get this to post.
     
  12. Gulfgears

    Gulfgears Gulfgears

    Retry can't get this to post.
     
  13. Gulfgears

    Gulfgears Gulfgears

    Retry can't get this to post.
     
    TrunkMonkey likes this.
  14. TrunkMonkey

    TrunkMonkey Totally bananas

    Your posts are showing up.
    I think you are not seeing them after you post them, if you are looking at "New Posts" .

    Click on your Profile and then the "Recent Activity" tab at the top. Then you will see this thread.
     
    Waterboy likes this.
  15. Max Damage

    Max Damage I'm working on it!

    Also there is nothing complicated about a TH350 or a 2004r from a pro Transmission guys point of view.
     
  16. ssmock

    ssmock Well-Known Member

    Michael,
    Hope all is well. Where are you moving to?
     
    TrunkMonkey likes this.
  17. TrunkMonkey

    TrunkMonkey Totally bananas

    All is good. :)
    Bought a place in Arkansas.

    Puts me closer to my little brother (He is in Wichita KS) and now more racin' before all the tracks shutdown.

    If you go to MoKan, you may have seen him. (he puts other guys' cars on trailers faster than anyone I have seen) :D
    Next time he is going to MoKan, I'll let you know and we can meet up!

    And it only ads 30 minutes to Bowling Green drive. LOL
     
  18. ssmock

    ssmock Well-Known Member

    Yes, be sure and let me know.
     
    TrunkMonkey likes this.
  19. '65softtop4

    '65softtop4 Well-Known Member

    1965 ST 300 SP Transmission is still available, $825.00 Fresh restoration.
    IMG_1622.JPG
     
  20. '65softtop4

    '65softtop4 Well-Known Member

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