26-inch adjustable column-shift linkage (ACA-1811 style) that connects a GM TH400, TH350, 700R4 or 4L60E to the column shifter on longer swaps.
If your column shifter will not reach Park or 1st, the indicator needle sits a gear off, or the key will not come out of a GM steering column after a transmission swap, the linkage between the column and the transmission is the usual culprit. This is a 26-inch adjustable column shift linkage kit, part number ACA-1811, for GM TH400, TH350, 700R4, 4L60E and related automatics. It is the long-rod version of the common 21-inch kit, made for trucks, long-bellhousing swaps and chassis where the column lever sits well forward of the transmission.
A column-shift GM truck has no cable at all on many older setups. The shift tube in the steering column turns a lever at the bottom of the column, and a rod carries that motion back to the selector arm on the transmission. On a TH400 or 4L60E the selector arm sits on the left side of the case and rotates the manual shaft that positions the manual valve. Every bit of slop in the rod ends, a worn bushing, or a rod that is the wrong length shows up at the column as a gear that will not engage or an indicator that lies. An adjustable rod with heim joints and a threaded adjuster lets you take that slack out and match the column gates to the transmission detents exactly.
On a 4L60E, a range switch reading an invalid position can set P0705. Fix the linkage first, then clear codes and recheck before you condemn the switch. Slipping, flaring or no 3rd and 4th are internal problems that our 4L60E Tahoe shift problems guide covers.
Unbolt the rod from the transmission arm and move the arm by hand through every detent. Then move the column lever on its own. If both feel crisp separately but they do not agree when connected, the rod length or ends are the problem. Measure from the column lever pivot to the transmission arm with both in Park. If that run is past what a 21-inch rod covers, this 26-inch kit is the one you need; shorter runs fit the 21-inch ACA-1800 kit.
The listing covers the shift shafts on the GM TH200, 200-4R, TH350, TH400, 700R4, 4L60, 4L60E, 4L80E and 6L80E/6L90E. It is a universal swap and restoration part, so it is not tied to model years; what matters is a GM-style column with a shift arm at the bottom and a GM transmission selector shaft. Column arms vary, and some aftermarket columns need the arm hole opened up for the bushings. If you are not sure it will reach, send us the vehicle, the transmission and the measured distance. For other parts for this unit see our 4L60E parts page.
Use anti-seize on aluminum threads. Converting from column to floor shift instead? See the 81120 side-grip ratchet shifter kit.
| Part number | ACA-1811 |
| Fits | GM TH200, 200-4R, TH350, TH400, 700R4, 4L60, 4L60E, 4L80E, 6L80E/6L90E |
| Rod | 26 in stainless steel, trim to fit |
| Transmission arm | Billet aluminum |
| Ends | Heim joint rod ends with threaded adjuster |
| Weight | 1.4 lb |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Measure from the column shift lever to the transmission selector arm with both in Park. If a 21-inch rod will not span it, buy this 26-inch kit. The rod is meant to be trimmed, so a little extra length is fine.
Yes. The 4L60E shift shaft is on the listed coverage, along with the TH350, TH400, 700R4, 200-4R, 4L80E and 6L80E/6L90E.
The rod length is not set yet. Loosen the jam nuts, turn the threaded adjuster until each column gate lines up with a transmission detent, then retighten. Also check that the indicator itself is adjusted at the column.
No. Keep your factory switch working. On a 4L60E that is the range switch on the side of the case, which must allow cranking only in Park and Neutral.
Often. The column only releases the key when the shift tube is fully in Park. A sloppy or short rod can stop the column just shy of Park even though the transmission is parked.
