Shifter base for T56 swap from 1993-2002 Camaro / Firebird & Commodore VR-VS

Shifter base for custom conversions using T56 transmissions sourced from:

  • 1993-2002 Camaro Z28 & Firebird Trans Am
  • 1994-1997 Holden HSV Commodore VR & VS
    • Does NOT FIT GTO or Holden Commodore VT-VZ - see separate listings
    • Does NOT FIT any other T56 model - see separate listings
  • NOT FOR USE IN THESE VEHICLES - see separate listings for specialized kits
    • Kits for use in Camaro have a stub bent left to fit console - see # 3915061
  • Also fits aftermarket Tremec Magnum F - NO others
  • Mounts at tail location on a rectangular 4-bolt pattern that is ~2.15" wide x 4.84" long; stub pivot ball center is ~1.1" below the flange

A Hurst stick is required (NOT included, sold separately). Other brands and homemade sticks are discouraged. Stick mount has 3/8"-24 threaded holes spaced 7/8" apart on center + mating serrations for a Hurst stick on one face. Due to larger mounting threads (3/8"-24), sticks that use 8mm mounting bolts (most OE, "non-TKO" Lokar, others) will not work. Lokar TKO sticks can be mounted but only to the smooth side of the stub. To select the proper parts:

  • Wait until new transmission is installed to buy shifter parts
    • Remove existing shifter base if present
    • Sit in vehicle, in driving position, with all interior trim (dash, console, etc) in place
  • Define desired knob location in space (neutral position):
    • Measure height from base flange to desired knob location = overall height
    • Measure side & rear offsets from receptacle bore to desired knob location
    • See this diagram for clarification
  • Study the Hurst stick page for shapes that meet your needs
    • Allow 3-6" for stick mount height
    • Choose a stick and see what fulcrum heights are compatible with it (see chart)
    • Check overall height (see chart: stick height + mount height = overall height)
  • Confirm chosen combination achieves desired knob location and that fulcrum height works with stick length selected
    • Consider various stick & stub combinations to optimize
    • Note long sticks on angled mounts will strongly offset knob to left (can be 5-6"+)
    • Options E & F require a Hurst stick directly mounted on side w/ serrations

Stub fulcrum height options (critical to optimizing leverage for short throw):

Option For stick length stick mount height stick mount angle upcharge
A 8" 3.2 vertical default
B 10" 3.7 vertical +$10
C 10"+ 4.7 vertical +$20
D 12"+ 5.5 angled 14 deg left +$30
E 13"+ 4.4 angled 14 deg left +$40
G 6" 3.7 angled 11 deg left +$10
H 5" 3.2 vertical +$10
  • Stick length = point-to-point distance from mount hole to knob thread
  • Stick mount height = distance from base flange to stick bolt hole (affects knob height)
  • Fulcrum height = distance from lower ball to fulcrum pin; varies by option, not published
    • Warning: Follow stick length guide to avoid excess effort & component failure

Kit includes mounting hardware and instructions. The base is built by Core Shifters using proven components inside a custom housing:

  • Billet steel gear selector stub
  • Hardened steel cross-pin & stainless steel fulcrum pivot ring
  • Self-centering cross-gate bias springs with heat treated spring seats
  • Glass-reinforced polyamide fulcrum socket with steel wear clips
  • Extruded aluminum housing with Spirolox steel support ring
  • Zinc-plated laser-cut steel base-plate & cover
  • Rubber oil control seal with steel retaining ring
  • Vibration-resistant serrated flange head steel retaining bolts

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