Floor-mount ratchet shifter that replaces worn column linkage on GM TH400/TH350, Ford C4/C6 and Chrysler A727/A904 three-speed automatics.
This shifter is for the swap truck or muscle car where the column linkage is worn out, bent, or simply gone after a Turbo 350 or Turbo 400 went in. It is a floor-mount, three-speed shifter that replaces part number 80675, the trigger-and-T-handle design that runs as a normal gated shifter for the street and switches to ratchet action when you want it. The steel body and stick weigh 10.1 lb as an assembly and measure about 17 inches overall, and the kit shown includes a console housing, cover gasket, multi-fold boot, shift cable, transmission brackets and hardware bags.
B&M describes the original 80675 as a vertical gate shifter and a ratchet shifter in one mechanism. In gate mode the stick moves straight forward and back; the trigger must be raised to leave Park, to enter Reverse, and to drop into second and first, while Neutral to Drive needs no trigger. To switch to ratchet mode you go to first, lift the trigger and pull the stick to its rear stop. From there each firm push upshifts one gear, and once the transmission is in third the stick is disconnected from the mechanism so it cannot be knocked into Neutral or Reverse. On the TH350 and TH400 that matters because the case only has a manual shaft and detent lever; whatever the cable delivers is where the manual valve goes.
Disconnect the rod or cable at the case and click the selector lever through its positions by hand. Each detent should be crisp. Then check line pressure; GM's diagnosis order puts fluid level, detent cable and manual linkage ahead of any teardown. If pressure is low with the lever correctly in range, start with the TH350 valve body testing guide instead of buying a shifter. Harsh rather than slipping shifts are a different problem, covered in TH350 harsh shift causes.
Listed for GM TH400, TH350, TH250 and TH200, Ford and Lincoln-Mercury C4 and C6, and Chrysler A727 and A904 from 1966 on. It does not fit the 700R4, 200-4R or AOD, and it cannot be used behind a reverse-pattern manual valve body because the gate is a standard P-R-N-D-2-1. B&M warns the original may require console modification or removal, and very thin floors may need a stiffener plate. See everything we stock for the TH350; send us your year and VIN if you need help confirming which three-speed is under your car.
A floor swap usually means the throttle routing changed too, so plan on a Lokar TH350 kickdown cable kit to keep the detent downshift working. If the transmission itself is tired, a TH350 master rebuild kit pairs well with the swap. Refill with DEXRON ATF.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. This is a three-speed gate for TH350, TH400, TH250, TH200, C4, C6, A727 and A904. Four-speed overdrive units need a shifter with a fourth forward position.
No. The detent pattern is standard P-R-N-D-2-1, so it is meant for forward-pattern valve bodies only.
On the 80675 design, go to first, lift the trigger and pull the stick to the rear stop to enter ratchet mode. To return, lift the trigger in Drive and push forward to the stop, then release.
The cable bracket mounts under two left-side pan bolts. With a cast aluminum pan the spacers are left out and the bracket needs modifying, per B&M's instructions for the original.
Often yes on a swap. The TH350 uses a detent cable from the carburetor for its passing-gear downshift, and a new intake or carburetor location usually makes the old cable the wrong length.
