Floor-mount 3-speed automatic shifter for TH400, TH350, C4, C6 and A727 swaps that runs as a straight-line detent shifter or a one-gear-at-a-time ratchet.
Building a Turbo 400 or Turbo 350 car for the street and the strip and tired of missing second on a hard pull? This is an 80675-style ratchet floor shifter for three-speed automatics with a polished chrome handle and trigger, an aluminum and steel mechanism, and a plastic base with a multi-fold boot. As pictured it comes with the red shift cable, GM, Ford and Chrysler transmission brackets and levers, two micro switches for neutral safety and backup lights, wiring terminals and mounting hardware. The assembly weighs 9.18 lb.
A three-speed GM automatic shifts itself, but which range it is allowed to use is set by the manual valve, and the manual valve only goes where the outside selector lever puts it. The 80675 design gives you two ways to move that lever. In vertical gate mode it behaves like a straight-line street shifter with a trigger lockout for Park, Reverse, second and first. In ratchet mode, per B&M's description of the original, each quick, firm push moves the transmission up exactly one gear: first to second, then second to third. Once it is in third the stick is disconnected from the mechanism, so an over-eager hand cannot knock it into Neutral and over-rev the engine, or into Reverse. That is the main reason racers run one.
A shifter will not cure a shift that is soft, late or flared. Check fluid level and condition, then click the case lever through every detent by hand with the linkage off. If the detents are clean and the shifts are still poor, the trouble is hydraulic; read our TH350 valve body diagnosis guide, and if the pan has not been off in a long time, start with the TH350 filter and pan service guide.
Fits the GM TH400, TH350, TH250 and TH200, Ford, Lincoln and Mercury C4 and C6, and Chrysler TorqueFlite A727 and A904 from 1966 and later. It will not work with a 700R4, 200-4R or Ford AOD, which need a four-position gate, or with a reverse-pattern manual valve body. B&M notes the original may require trimming or removing the console. Parts for the rest of the build are in our TH350 collection.
While the case lever is off, replace the manual shaft seal from a TH350 external reseal kit. For firmer shifts to match the shifter, add a TH350 shift kit. Refill with DEXRON ATF.
| Fits | GM TH400, TH350, TH250, TH200; Ford C4, C6; Chrysler A727, A904 (1966 and later) |
| Does not fit | 700R4 / TH200-4R, Ford AOD, reverse-pattern manual valve bodies |
| Modes | Straight-line detent or ratchet (sequential) |
| Material | Aluminum and steel mechanism, plastic base, chrome handle |
| Weight | 9.18 lb |
| Ships from | USA |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The shifter with chrome handle, trigger and boot, the shift cable, transmission brackets and levers for GM, Ford and Chrysler, two micro switches for neutral safety and backup lights, terminals and mounting hardware.
On the 80675 design, put it in first, lift the trigger and pull the stick to the rear stop. Each firm push then upshifts one gear, and in third the stick disconnects so you cannot hit Neutral or Reverse.
No. It is a three-speed gate. The 700R4, 200-4R and AOD need a shifter with four forward positions.
B&M's instructions for the original have you interrupt the starter feed wire from the ignition switch and run it through the shifter's neutral safety switch so the engine cranks only in Park or Neutral.
Both follow the 80675 trigger design for the same three-speed transmissions. This one has an aluminum and steel mechanism with a plastic base at 9.18 lb; the other has a steel body and stick at 10.1 lb and ships with a console housing.
