4th

  1. G

    Props to John B. and his gears. - review

    SLC 2017 LT4 Engine w/ pully upgrade making 600rwhp and 608lbs tq. After purchase but before my SLC was even in the build stage, I was approached by my builder about a different gear ratio that he believed would help my SLC be more driver-friendly. Not knowing anything about the Graziano...
  2. S

    ZF 4th gear breakages

    I've got a Roush 427 Windsor stroker 505hp 520ft. lbs. Twice I've broken 4th gear in my RBT, 7 years ago and now. Both times during track days. Once on a downshift, once on upshift. First time all the gear teeth were stripped off, this time just one broken tooth. Reading old posts someone said...
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