General trans?

Discussion in 'The "Juice Box"' started by Nailhead Ronnie, Aug 15, 2017.

  1. TexasT

    TexasT Texas, where are you from

    http://www.ihadav8.com/forum/index.php?topic=3729.0

    2004r is something I know a bit about. Put out a hunt for a mid eighties Cadillac and get the AA code 2004r along with the tv cable and id grab the carb and the tv brackets. You might get the converter too so you will have a core to trade for another or get it cut and restalled if you can find the place the trans shops in the area use. Or maybe there is a place that does the local racers converters. Have them put in the roller bearings instead of the washers, furnace braze the fins and a new lock up clutch. Just have to do some detective work. Or you could send it to my guy in Weatherford, TX. They do their own converters and I like mine.
     
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  2. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member


    I have a 430 4 barrel off a non GS Riviera, stock with a b4b intake..
    I want traction, I want to launch and not lose time/power slipping on the green light.

    Is there a good known equation for getting the cars two front wheels off for example something like torque x rear years ÷ car weight = amount of umph off the line?

    So yeah I would like put sticky tires on it? But I'm green to sticky tires too in the aspect of can they driven on the freeway and maybe rain?
     
  3. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    How much with taking this route would you suspect the bill would end up costing me?
     
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    Then you need to beef up a 2004R because traction will stress the transmission. Yes you can drive the standard Mickey Thompson drag radials on the freeway, but I would not drive them in the rain.


    Gears are multipliers of torque. Multiply the first gear ratio of the transmission by the rear gear ratio. That will tell you how much umph you'll have if you hook. Higher number is better. First gear on the THM400 is 2.48. First gear on the 2004R is 2.74.
     
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  5. TexasT

    TexasT Texas, where are you from

    I put that one in my thread together for less than $500. I would how ever include a billet shaft forward drum and dual feed the direct clutches if you were to put it behind the BBB. Not hard but it adds about $350-600 or so depending on where you get the billet shaft forward drum.
    the billet servo is $150-200, I did the hard sun shell and hard stator support for about $40, but I would use these on any 2004r I put together. Also need a larger boost valve, rev/boost valve and the spring for the 700r4 to get the internal pressures up. I have some info on some spring swapping in the valve body and I used hard rings and a sonnax spring in the pump. Also swapped in all new roller bearings and bushings. And I have a guy that told me he could cut the low/rev for a bearing and the od apply for an extra of clutch and will do that on the next one for my GS
     
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  6. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    images-35.jpg images-35.jpg images-35.jpg
    Thanks for your recipe. I appreciate it

    And thanks for everyone. This forum has helped me understand the "magic" in the transmission, not all of it but I'm getting there. I still feel like this though
     
  7. TexasT

    TexasT Texas, where are you from

    if you don't ask the question it is hard to get the answer. I'm more than willing to help and I'm sure other feel the same way.
     
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  8. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    Hey Bruce and others, what about a th400 produced in 1968, will it have a responsive valve body or should I keep my eye on the 70-mid70 th400?
     
  9. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    And the available filter and pan?
     
  10. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    Ran across some guy running a th350 and a 409 Chevy Big block and he told me he was very happy and all he upgraded was a hardened race on the th350. Better ratios and less hp needed to turn it at accelerating speed. Then I talked to someone else who sold me with my stock 430 pushing stock numbers a th350 would be enough. Seen online where some have replaced everything as in the race, 36 element sprag, & drum. But like I said the guy who's running the 409 races it at the track with a trans brake and everything.
     
  11. 300sbb_overkill

    300sbb_overkill Well-Known Member

    J.staged runs a TH350 behind a BBB 455 with a 3.73 rear gear and runs 11.50s in the QM.

    A properly built a TH350 will handle 600 + HP.
     
  12. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    See another testimonial for the th350. I'm thinking forget overdrive and just pull the trigger on a 3 speed automatic and gear the Bufford right.
     
  13. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    So any body on the 1968 th400 vs a 70's?
     
  14. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    The better valve bodies in general are 68 and up. Look for a big car 400 from the early 70's. They are more likely to have the better calibration that allows the 3-1 kick down at lower speeds.

    http://www.buickperformanceclub.com/SPTrans.htm
     
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  15. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    Ok I read the link you sent me and now I see why you lean towards the mid 70 th400 given then have a larger valves in the VB that make it perform better. That's what I'm looking for. In also seen how the SP can be a bug if not picked right or modified for my set up. From what I read are all valve body's interchange able from th400's like a 68 and a 73?.
     
  16. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    I'm leaning towards the th400, today hahaha
     
  17. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    Yes.
     
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  18. TexasT

    TexasT Texas, where are you from

    nothing wrong with a th350 or th400. The main goal should be to get it in the car and get to driving it. As above the ratio makes a different no matter if it is rear gears, deeper first gear in the trans or the od gear to slow that engine down at highway speeds. It does need to keep what ever engine you are using in the rpm range where it makes power. A sbc or BBC the makes big power at 4500 rpm and up you need that deep rear gear to get that engine spinning. A Buick engine is more suited to Making power in the lower rpm range like 2000rpm so you want to keep that engine in that range to use the power the engine is making. Trying to spin it real fast with deep gears just makes the valve train and then the rotating assembly break.
     
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  19. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    Thanks Larry And TexasT.
    Just had to really just forget about the sbc chevy experience I've had and start thinking new with a BBB mind state. Thanks guys I appreciate your post, have a great work week.
     
  20. Nailhead Ronnie

    Nailhead Ronnie Well-Known Member

    A riviera code BT 1969 is around me also, would you still wait for 70's. The 69 would have the upgrade in the center case right? How bout the drum, is it the ones you can't upgrade?
     

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