Liam’s Commando, Episode 4: Ghost Brakes, a Frankenstein Linkage, and a Power Steering Pump That Tried to Kill Itself

Liam’s been chipping away at his ’72 Jeep Commando, and he’s brought that build onto our channel as a collaborator. Here’s the recap of episode four.

Liam and his buddy Bread started this episode chasing a problem every old-Jeep owner knows in their bones: brakes that just… don’t. Air pressure test on the lines, no flow out the other end. Master cylinder unplugged, black gunk instead of fluid. Clog confirmed, in more than one spot. Classic old-truck sendoff.

Instead of nursing the stock setup back to life, Liam made the call to convert to hydro-boost — using the power steering pump for brake assist instead of a bulky vacuum booster. The pitch: hydro-boost units are noticeably narrower, and the Commando’s engine bay isn’t exactly generous. If it fits, it solves two problems at once.

Where do you find hydro-boost parts for a project like this? A wrecking yard — the hydro-boost unit itself came off a mid-’90s Chevy pickup. While he was there, an ’87 Grand Wagoneer also got picked clean for a bonus find: a bench seat that might just fit the Commando. You know how this goes. (The hood ornament, in case you’re wondering, is a leftover from a different Grand Wagoneer — this Jeep’s been collecting parts for a while.)

From there it was straight into the kind of fabrication that doesn’t come with a manual. The transmission mount setup had clearly been “fixed” by someone before — a hole cut into the frame, bolts through it with no real backing. Liam rebuilt it properly with grade-8 hardware and a fabricated L-bracket to spread the load. Then came the shift linkage, a column-shift setup for a turbo 400 trans that apparently nobody documents online. So he measured the old one, figured out the geometry from memory and old photos, and built his own reference for anyone else stuck in the same spot.

The power steering pump swap brought its own puzzle — wrong plate orientation, a snap ring nobody wanted to give up, a shaft two inches too long that needed cutting and re-welding, and a flange job that ate several attempts (and a fair amount of heat) before it held. Bleeding the new hydro-boost system finally got fluid flowing.

And then the pump let go. Overheating fast, boiling fluid, a chewed-up bushing shedding metal shavings straight into the lines. Turned out the real problem wasn’t the pump at all — the hydraulic lines were reversed on the master cylinder the whole time. Fixed the plumbing, and the system finally worked. Now it’s a magnet-in-the-fluid cleanup job to catch every last shaving before it does more damage.

Net result for episode four: no brakes that actually stopped the Jeep, no completed swap — just a Commando still sitting in the garage and a solid list of lessons for episode five. That’s the job, though. You don’t always get the win in the same episode you found the problem.

Go check out the full build in this episode, and if you’re into old Jeeps that fight back, keep following along as Liam’s Commando series continues.

Wheel it, Wreck it, Wrench it, Repeat!