Shifter base for T56 swap from 2004-2007 Cadillac CTS-V
WARNING: shifter stick will come through floor directly above linkage cover ~19" from engine block! In most cars this is WAY too far forward (see pic). Confirm this position works before you buy any parts!! For more info click here
Shifter base for custom conversions:
- ONLY FITS T56 transmissions sourced from 2004-2007 Cadillac CTS-V
- NOT FOR USE IN THIS CAR! Stick is NOT offset rearward like OE & will NOT FIT in console - it would be ~15" ahead, under the dashboard...
- Does NOT FIT any other T56
- Converts from remote OE cantilevered shifter to direct mount (replaces OE linkage cover - see transmission pic)
- Fits onto transmission with NO modifications! Simply remove linkage cover and install base. Shifter stick will come through floor directly above linkage cover!
- For driveshaft help - contact The Driveshaft Shop
This base mounts on a 4-bolt rectangular pattern that is ~ 2.88" wide x 3.65" long; stub pivot ball center is ~1.5" below the flange. It only fits in forward location as discussed above. For tail location bases, see separate listings - these vary by model - T56 shifters are NOT universal!
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" | 2.8 | vertical | default |
| B | 10" | 3.3 | vertical | +$10 |
| C | 10"+ | 4.3 | vertical | +$20 |
| D | 12"+ | 5.1 | angled 14 deg left | +$30 |
| E | 13"+ | 4.0 | angled 14 deg left | +$40 |
| F | 14"+ | 4.2 | angled 14 deg left | +$40 |
| I | 6" | 3.3 | vertical | +$80 |
- 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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