• Category Archives TH400
  • More updates..

    Posted on by Alex

    Finally got around to doing a few things on my setup.  Installed the fabricated intake, SFI flexplate, converter and put it all back in the car.   Did the final weld on the downpipe and made a small bracket to hold it up.   Next up is mounting the dual fan setup to the radiator.  Its a super tight fit.  Then modifying the water pump to block off the heater since I will not be running one.  I also had to modify my old cold side since it was for the blow-thru setup, not the new EFI setup.  Turbo to IC done, still need to modify what I have from IC to intake.  Cooling setup first though.  The shot under the Camaro is with the new F-body oil pan, much better clearance than before!

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  • Updates on my rig..

    Posted on by Alex

    Well, the turbo Camaro is patiently waiting for a TH400 transmission.  I ended up taking my trans and all parts I bought to Winners Circle Transmissions for them to build it.  I ended up taking the core apart, putting it back together but didnt feel comfortable building one that will go behind a 900hp turbo Camaro.   Here’s some pics of what I bought, it was all from CK Performance.  Not pictured is the TH400 master rebuild kit with Alto red clutches, steels, etc.  Pictured is the reverse manual valve body with a trans brake, billet input shaft, forged steel rollerized forward clutch hub, 6 clutch direct clutch housing w/34 element sprag, 4 clutch billet intermediate pressure plate, billet sun gear shaft.  This setup will easily hold 1500hp at the minimum.   I had to yank out my engine and mockup th400 transmission while I wait for mine to get built.   While that was done, I had to replace the “muscle car oil pan” since it still sat too low and installed a F-body pan, pickup tube, windage tray and also had a -10AN return tapped into the side.  You’ll also notice I test fit the new fabricated intake with a Nick Williams 102mm throttle body onto the engine.  I’ll need to modify the throttle body since it doesnt open up all the way.  The TB hits the intake so I’ll need to grind the throttle cable guide a little to clear (pic shows the interference).  Also pictured is a flexplate that enables my 6.0 LS to bolt up to a TH400 with the converter without needing to round out the converter holes on said flexplate.  The pic under my Camaro is where you can see the muscle car pan.  It just sits too low.





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  • More changes to the turbo setup / TH400 build

    Long time no update..

    I’ve had my car at a local shop since I’ve been busy with work and the real world.  Previously I had to make room for the intercooler and radiator.   The problem was that my turbo hotside from the manifolds to the turbo should have been tucked closer to the engine.  Since I did not do that, the wastegate would hit the dual fan setup.  Talk about a bummer.  That was the biggest issue.   So I took my car to a local shop and they basically redid what I fabbed up.   Oh well, got me a little closer to getting done.   Here are some pics of how the setup looks.   As you can see, there is also PLENTY of room for the drivers side alternator mount.  I also switched to a Corvette LS2 crank pulley that I need to install.  It looks like I took 4 steps forward and 3 back, but actually this was a huge help for me since now everything fits.  Next is the TH400 trans.


    The TH400 that I need is about $1500 that can hold 1000HP, or from someone I’ve used before its $1900.   After watching some Youtube vids on TH400 building and my wife pitching in and buying me two books on TH400 building, I figured I’d get after it and build my own transmission.  Right now I have it torn down and am waiting on parts to come in.


    First things first..I need a TH400 bracket that I can bolt to a bench.  They run about $175.   Well I ran across this bench and TH400 bracket for $150.



    Then I found this working TH400 core, so I put it on the bench.  Looks good next to my toolbox.  🙂   The two books are the ones I’ve been reading.




    And here is the TH400 and all its innards.




    The above pic..looks like we have a chipped tooth which holds a retaining ring.  I think it’ll be ok.

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    Another small issue.  Broken piece off where the trans pan bolts to.   I noticed 2 bolts missing but didnt see this until I removed the pan.   If I need to, I’ll have this fixed.



    Cleaning it off with a pressure washer.   Looks ok, but needs to now be cleaned by hand.



    Bought new tools for assembly and there’s the case for the TH400.