Re: 98 Expedition Trans Bypass Whining
I thought it was primarily Dodge transmissions that were prone to failing after a flush! Given that you've put 20K on the trans already I don't think the noise is a very bad thing, providing fluid levels are correct. The cooler may be blocked, as a flush can dislodge large particles that would otherwise have stayed in place. As you mentioned that the transmission would vibrate...I'd take it to a good trans shop for a proper diagnosis if no one can give you a solid response here.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!