Project “Silver Bullet” — Part 3

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  1. #1
    CelicaSupra.com Member supraholic's Avatar
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    Project “Silver Bullet” — Part 3

    Hi Gang,

    It’s been almost 8 years since I’ve done any mechanical mods to my car. However, that will change this winter as I will be installing a fully built R154 transmission with all the Marlin Crawler goodies (rebuilt by Dirftmotion) along with OS Giken Grand Touring twin plate clutch, including hydraulic release bearing upgrade. The W58 has held up ok but the clutch is now slipping as I go over 12 psi of boost. I also noticed I’ve got a rear main seal leak so I’ll be installing a new one while I’m swapping the trans (could be why the clutch is slipping as well).

    Stay tuned for more to come on this thread once I get the trans shipped back from Driftmotion. I just put her on the lift today for winter hibernation and to get ready for the trans swap:



    -Dan

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  3. #2
    Boosting Mod SilverMk2's Avatar
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    Unfortunately I think you'll find the R154 is a big step backwards in driveability.

  4. #3
    Member jemattson18's Avatar
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    Quote Originally Posted by SilverMk2 View Post
    Unfortunately I think you'll find the R154 is a big step backwards in driveability.
    Why is the R154 a big step backwards in driveability?

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  6. #4
    Boosting Mod SilverMk2's Avatar
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    You can't get the damn thing in gear. 2nd and sometimes 3rd I have all kinds of problems getting it into gear at high RPM. Plus they are prone to leaking at high power and if you break anything you're SOL. There are far better choices these days for what people want for used R154s.

  7. #5
    CelicaSupra.com Member supraholic's Avatar
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    Project “Silver Bullet” — Part 3

    I picked up my used R154 from another forum member 6 years ago and if I recall I paid just a few hundred bucks. Been sitting in storage ever since so figured I’d use it. I’ve heard good things about Driftmotion rebuilds w/upgraded Marlin Crawler forks; and they even sell brand new R154’s now. But alas, the last time I drove a supra with a R154 was back when I owned an ‘88 Turbo 12+ years ago—I don’t remember it being too bad...

    Agree, paying $2k+ for a used 154 is crazy, imho.

  8. #6
    Whistles racerxj220's Avatar
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    High RPM lock outs definitely forced me to upgrade.

  9. #7
    CelicaSupra.com Member supraholic's Avatar
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    Quote Originally Posted by racerxj220 View Post
    High RPM lock outs definitely forced me to upgrade.
    What did you upgrade to? Curious...thanks!

  10. #8
    Whistles racerxj220's Avatar
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    PGS gearset.

  11. #9
    CelicaSupra.com Member supraholic's Avatar
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    Quote Originally Posted by racerxj220 View Post
    PGS gearset.
    I just looked it up...$4500 for gearset swap---YIKES! No doubt, these gears look bulletproof but i hope to do my entire R154 trans swap (w/fully rebuilt trans incl. all MC parts) plus brand new dual-plate clutch w/hydraulic T/O bearing...all for about the same price of just these gears alone.

  12. #10
    CelicaSupra.com Member 82TURBOSUPRA's Avatar
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    I bought a new R154 from Driftmotion last year and shifts great at high RPM'S, but have only driven it @1000 miles with a 1jz stock twins at 17 psi.
    I blew 2 W58's with the steel center plates all in 5th gear just accelerating on a pass. Now I have to buy another one for my other 84 Supra 1jz which also
    blew 5th gear on a W58 just passing.Then maybe the upgrades will be complete.
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