Since the H42 transmission had a spacer instead of a 5th gear, it also had a crossbar for reinforcement, causing a lot of bad things to happen, at least for people wishing for a swap. First Gear Ratio: 2.77:1 Second Gear Ratio: 1.87:1 Third Gear Ratio: 1.46:1 Fourth Gear Ratio: 1.18:1 Fifth Gear Ratio: 1.00:1 Sixth Gear Ratio: 0.62:1 Though mine is geared 3.27 2.22 1.87 1.56 1.00.76 whats nice about these guys is both the upper and lower shafts are modular so changing ratios is rather easy. Power is transmitted along the cluster shaft to first cluster gear at the opposite end. The first cluster gear meshes with the first mainshaft gear. Since the transmission is in first gear, a circular array of small synchronizer teeth on first mainshaft gear engage matching teeth on a slider.
Mar 02, 2020 · If that were the case, the Bronco’s first gear ratio would be 6.82:1. That seems incredibly low at first glance, but the classic Muncie SM465 four-speed had a 6.55:1 first gear. 1976 Chevy C30 2wd-My transmission (SM465) makes a grinding noise in 4th gear at highway speeds, sounds just like someone is attempting to shift gears without the clutch. You can accelerate through it, but as soon as you let up on the throttle a little bit it's right back to grinding.