Shifter base for Tremec Magnum aftermarket - tail mount

Shifter base for custom conversions:

  • Only fits Tremec Magnum 6 speed (aftermarket TR6060, successor to T56):
    • Tremec #s including TUET7477, TUET7478, TUET7484, TUET 8272, TUET8274, TUET8275, TUET8277, TUET11009, TUET11010, TUET11011, TUET11012, TUET16884, TUET16885
    • GM Performance # 19352208 / 19329795 / 19301620 ("T56 Super Magnum")
    • Ford # M-7003-M6266 & M-7003-M6295
    • Does NOT FIT any OE T56 or TR6060 - see separate listings
    • Does NOT FIT Magnum "F" (4-bolt base)
  • Replace the Tremec-supplied base with a higher fulcrum to reduce throw
    • Tremec's fulcrum height is only going to be "short throw" with a 5" stick; follow the list below for substantial improvement with taller sticks!
    • Also improves 2-3 shift w/ lateral bias springs that boost neutral centering
  • Mounts at tail location on a rectangular 6-bolt pattern that is ~ 3.56" wide x 6.75" long; stub pivot ball center is ~1.2" below the flange
    • Forward port relocation kit also available - see separate listing

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
OE Tremec 5" 3.5 vertical
A 8" 3.1 vertical default
B 10" 3.6 vertical +$10
C 10"+ 4.6 vertical +$20
D 12"+ 5.4 angled 14 deg left +$30
E 13"+ 4.3 angled 14 deg left +$40
F 14"+ 4.5 angled 14 deg left +$40
G 6" 3.5 angled 11 deg left +$10
H 5" 3.0 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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