Blake0000
New Member
- Joined
- Dec 29, 2019
- Messages
- 4
- Reaction score
- 1
- Points
- 3
- Location
- Alabama
- Vehicle Year
- 1999
- Make / Model
- Ford ranger
- Transmission
- Manual
I have a 1999 ford ranger 4wd. It has the PVH (pulse vacuum hubs) system for locking the front hubs in 4wd. My hubs seems to be stuck locked in 4wd and I can’t find anything on how to fix it. When you switch it back to 2wd the transfer case disengages but the cv axles stay connected to the wheel hub assemblies. It wasn’t that big of a deal at first because I know in 2000 they switched to a live axle system where the cv axle and hub assembly were locked together all the time. Now though I’ve started noticing a constant scrap/squeal as my front driver wheel rotates and my gas mileage has went down. So I removed the tire and all brake components and checked the noise it was there while spinning the hub assembly but when I removed the PVH hubs and just the hub assembly was spinning without the cv axle connected the noise wouldn’t happen. Also because they are staying locked together my front drive shaft spins as the truck moves and around 60mph I hear a random pop sometimes. I’ve checked the vacuum lines and the solenoid I have 20 in hg of vacuum everywhere in the system in 4wd and 0 in hg in 2wd. So does anyone know if if I am correct on my diagnosis and if so does anyone know how to fix it without buying new parts.