strange pumpish sound
So my truck has plenty of issues, but here is a new one to add to the list. An occassional pumping like sound and associated feel coming from the firewall/under cab area. Since I think I have a failing drivline speed sensor, I'm thinking maybe its the ABS pump. The sound is refined, like whatever it is is suppsed to work that way. But it deffinatly a motor of some kind. I'm not using 4x4 so I would assume its not the transfer case motor..
Just wonderin if this has happened to anyone, and maybe some pointers on how to resolve it.