Driveline resonance |OBS F350 7.3L Powerstroke SRW 4×4 rear driveshaft to pinion yoke ujoint repair

The truck developed a nasty driveline vibration at about 2000 RPM going down the freeway, causing the dashboard in particular to rattle and resonate. Stabbing the accelerator up to 2500 RPM, or simply lifting and coming off the pedal, would bring the truck out of resonance with an audible metallic clanking as the driveline unloads.Continue reading “Driveline resonance |OBS F350 7.3L Powerstroke SRW 4×4 rear driveshaft to pinion yoke ujoint repair”

CEL P1391 & P1393 |OBS 7.3L Powerstroke | Glow plugs, valve cover gaskets & wiring harness, glow plug relay

Addressing check engine light for DTC’s P1391 and P1393: Glow Plug Circuit Low Input Bank 1 & 2. Started by replacing all 8x Motorcraft glow plugs, but after checking resistance of each plug, found them all to be acceptable, low ohms.  Went ahead and checked resistance of new glow plugs and installed all new. Next,Continue reading “CEL P1391 & P1393 |OBS 7.3L Powerstroke | Glow plugs, valve cover gaskets & wiring harness, glow plug relay”

OBS F350 aluminum topper & Phase 1 exo cage from lumber rack

Started sourcing major components by finding an uncommon Rack-It long bed lumber rack specifically designed with additional width to fit over a truck topper (also known as a camper shell). One popped up locally on FB marketplace, and I jumped on it despite it begin mangled and sitting in a field of weeds. It wasContinue reading “OBS F350 aluminum topper & Phase 1 exo cage from lumber rack”

Engine oil leak at cold start | OBS 7.3L Powerstroke oil cooler replacement

After a month of winter traveling at high elevation in Utah, truck developed a nasty oil leak at cold starts. Leak goes away after reaching operating temp, yet continues to weep oil after shutting down and cooling off. The 7.3L Powerstroke’s oil cooler is a tubular heat exchanger between engine oil and coolant along theContinue reading “Engine oil leak at cold start | OBS 7.3L Powerstroke oil cooler replacement”

Broken down on White Rim Trail | Buckled steering tie rod on Ford hp balljoint Dana 60 axle

Making good time on an anticlockwise loop of White Rim Trail, Canyonlands National Park, Utah. Then, on a trail squeeze section buckled a brand new tie rod on the Dana 60 with all new inverted-Y steering components. 15:00 broken down steering, truck is undriveable through switchbacks. With a buckled tierod, the wheels can be turnedContinue reading “Broken down on White Rim Trail | Buckled steering tie rod on Ford hp balljoint Dana 60 axle”

OBS F350 front leaf spring | Reverse Shackle Kit (RSK)

Installing Sky’s Off-road front RSK kit, while reusing factory front leaf springs. RSK for reverse shackle kit, moves the shackle from the original front hanger position, to the rear of the leaf spring. The kit includes a new crossmember that ties the frame to the new front spring hangers. It mounts uses existing frame holesContinue reading “OBS F350 front leaf spring | Reverse Shackle Kit (RSK)”

ZF-5 Manual Transmission Flywheel + Clutch

Addressing the transmission and failed starter motor. Replaced starter which broke at the starter gear housing, and while the ZF-5 transmission and drivelines were removed from the truck, went ahead and had the following parts replaced for $1000 in labor: flywheel, engine rear main seal (Ford p/n F4TZ-6701-A) pressure plate, clutch, shift fork (Ford p/nContinue reading “ZF-5 Manual Transmission Flywheel + Clutch”