TCI 3500 stall converter too much for the street

Discussion in 'Transmission & Driveline Topics' started by f-body, Sep 1, 2005.

  1. f-body

    f-body Veteran Member

    1,674
    0
    Feb 1, 2000
    Dallas
    I installed my TCI 3500 stall converter and my problem is I only have 3.73 gears. My cruise rpm is 3000 rpm at 70 mph. It takes off great but it seems like too much for the street. I have a stock 12 inch converter and am considering putting it back. I just finished installing this engine and trans talk about frustrating. Its a 350 .060 over with big 882 casting heads with 2.02/1.60 valves, Sy1 cross ram intake, a 280 comp cam by the way, .480 lift with 230 duration@.050. I think power range is 2000 rpm to 6000 rpm. I have a quadrajet on it right now and will have the Holley double pumper on it this weekend.
    I thought the stall would be a little high but on the highway it feels like its slipping cause its below the stall rating of the converter, pick up speed to 75-80mph and it feels like it pulls better. Nail the throttle from a dead stop and it just takes off great.
    I am thinking of a 2000 or a 2500 rpm stall converter.
    Who is running what stall converter? Any suggestions? Any one running
     
  2. night rider

    night rider Veteran Member

    6,401
    3
    Aug 6, 2002
    Bremen, Ga
    I run a "2800" 11" converter but flashes to around 3200 rpm or so.

    With 3.42 gears, and 27.05" tires (255/60-15)

    I turn 2800-3,000 rpm at 70 MPH depening on if I'm going up hill, down hill, etc.. On the flat I'm right at 2900 rpm at 70 MPH.

    I have no probs what so ever with that.. This is my daily driver too.

    Running like 90 down the interstate i'm only at 3,800 rpm.. To me that's not that bad, but when it comes to RPM everybody has thier own ideas and opinions.

    I built mine for good 2500-6000 rpm use so why not run it in the heart of its power band
     
  3. f-body

    f-body Veteran Member

    1,674
    0
    Feb 1, 2000
    Dallas
    Jakeshoe

    Why would my tranny be dumping oil when driven hard. Must be a line loose or something. Its not coming from the little vent hole on the top of the trans case. It looks like behind the torque converter. I will jack it up and look under it this weekend. I guess maybe the front seal could have blown but it was brand new, it oiled down the entire bottom of the car.
    Any thing I should look for lines, fornt seal, front pump. Tranny works fine it just dumped fluid all over the car and now I have tranny fluid all over the mufflers and it looks like I am trying to kill mosquitos. It really only does it more when I get on it.
     
  4. theflash

    theflash Veteran Member Lifetime Gold Member

    11,017
    15
    Feb 27, 2004
    Podunk, CT
    It has always been my belief, that when running a high stall converter with higher gears, your going to be generating a lot of heat in the tranny because the torque converter is never close to lock up and spinning a lot Unnecessarily.
     
  5. jakeshoe

    jakeshoe Veteran Member Lifetime Gold Member

    8,859
    1
    Dec 8, 2000
    Republic of Texas
    Be sure the lines are tight, the kickdown cable and dipstick tube are secure, and that it isn't overfilled.

    It can push fluid out the dipstick tube if its overfull.

    Could be a front seal issue but then it should leak all the time.
     
  6. zfactor

    zfactor Member

    34
    0
    Aug 3, 2005
    Columbia, Maryland USA
    I have the 10 inch 3000 stall converter TCI street fighter th350 and 4.10 gears with 28 tall tires and my cruise at 60-70 is 3000-3500 im thinking of getting the 200 r4 with overdrive to help with highway long drives fuel econ about 10 MPG could be better running tune up im working on
     
  7. zfactor

    zfactor Member

    34
    0
    Aug 3, 2005
    Columbia, Maryland USA
    also when i had my stock converter in there with the comp ex 284/292 .500/.511 lift cam the car woldnt idle cause the converter wasnt loose enough
     
  8. Joekool

    Joekool Veteran Member

    5,901
    28
    Feb 4, 2002
    Hollister CA USA
    4.11 gears, rpm cam and heads and 2500 stall works very well for my camaro. If you had econo gears then a higher stall would be a needed but with 3.73's your combo just doesnt seem to be radical enough for 3500 stall convertor.
     
  9. extreme79z

    extreme79z Veteran Member

    330
    1
    Apr 16, 2003
    Rayville, La
    What kinda track times u looking at f-body? Just curious...
     
  10. 73454

    73454 Guest

    Unless you have 30" tall tires, and you're going down hill with your foot out of the throttle, there's no way you're turning 3000 RPM at 70 with a 3500 RPM converter and 3.73 gears. I have a STOCK converter, 3.73 gears, and 28" tall tires and I run at 3400-3500 RPM at 70 depending on the grade of the road and the temprature of the transmission. Even with a lock-up converter it would be at 3135 at 70 in 3rd with 28" tall tires.

    I think it is time to make sure you have the right speedo gears in your transmission as well. Since you're thinking about dropping it out to change the converter, you might as well put in the correct drive/driven speedo gears.
     

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