KOONDHEEND Adjustable Shift Linkage Kit for GM Transmissions — ACA-1804 6ft Stainless Cable, Aluminum Mount for 1.5"–2.25" Columns

KOONDHEEND ACA-1804 is an adjustable shift linkage kit that replaces LB01-ACA-1804 and delivers a 6-foot stainless steel cable with an aluminum mounting assembly for GM short-shaft transmissions and 1.5"–2.25" columns.

This kit is built to adapt aftermarket and many GM steering columns to a variety of THM transmissions, offering a long, flexible cable and a sturdy aluminum mounting bracket so you can route the linkage around exhaust, brake lines, and tight chassis spaces. It’s engineered for compatibility with common GM short-shaft transmissions (THM200-4R, THM350, THM400, 4L60/4L80-E short shaft) and is a direct replacement for ACA-1804/LB01-ACA-1804 while excluding Powerglide and long-shaft 4L60E/4L80-E variants.

Will this fit my steering column and transmission?

The ACA-1804 fits most 1.5" to 2.25" GM and aftermarket columns and is designed specifically for short-shaft THM-style transmissions. Check shaft style and column diameter before buying to confirm compatibility.

• Direct replacement for ACA-1804 / LB01-ACA-1804 models
• Compatible with THM200-4R, THM350, THM400, 4L60/4L80-E (short shaft)
• Not suitable for Powerglide or long-shaft 4L60E/4L80-E
• Fits columns from 1.5" up to 2.25" without modification

How is this kit installed and routed in tight engine bays?

The kit includes a six-foot stainless cable that provides generous routing options for around exhausts, brake lines, and crossmembers. The bracket is reversible for left- or right-side columns, and the assembly uses common 0.5" pre-drilled holes so many installs require no extra drilling on factory GM columns.

• 6 ft stainless cable for flexible routing and reach
• Reversible aluminum mount adapts to left/right columns
• 0.5" pre-drilled holes for straightforward attachment
• Step-by-step manual plus online video walkthroughs available

How durable and precise is the linkage under everyday use?

The linkage has been cycle-tested for repeatability and designed to maintain consistent shift feel over time. Heavy-duty materials and machined components help resist stretch and wear so shifting remains accurate across many cycles.

• Stainless steel cable resists corrosion and stretching
• Aluminum mount provides rigid support under load
• 2000+ cycle testing for sustained shift accuracy
• Pairs with BL-1400U safety switches for modern setups

What support and return options are available if it doesn’t fit?

KOONDHEEND provides fast support and a straightforward replacement policy to minimize downtime if the kit is incompatible. Guidance and troubleshooting resources are offered via messages and included documentation so you can get the right result quickly.

• Instant 1-year replacement through Amazon Messages
• Free returns if the kit does not fit your vehicle
• Installation manual and searchable video tutorials (search "ACA-1804 install")
• Compatibility notes included to prevent ordering errors

Who this is for: The KOONDHEEND ACA-1804 suits builders, classic car restorers, and hot-rod enthusiasts who need a reliable, adjustable column-to-transmission linkage for GM short-shaft THM transmissions. It’s ideal when routing space is limited, when a reversible mount is required for left- or right-side columns, or when you want a direct replacement for ACA-1804/LB01-ACA-1804 without fabricating a custom cable. If your project uses a long-shaft 4L60E, 4L80-E long shaft, or Powerglide transmission, choose a model specific to those shafts instead.