Please Help!!

[Ford4x4Hunter]

I have a 1999 f250 7.3L, to day i was driving down the highway and i was just going over 50 and let off the gas and heard this like grinding noise almost and under 50 it just stopped, my gauges were fine no rpm spikes no codes throw no lights came on so i didn't worry about it then got up to speed and let off gas to see what would happen and it did it again, any one know why or has had this happen to them what can i do

Thanks,

Dan

[Codum]

Front wheel bearing? How many miles on the truck?

[kitchene]

auto or manual?

[Ford4x4Hunter]

auto and 225 miles

[Codum]

225k miles. Have the front wheel bearings been replaced yet? I have 373k on my truck and have replaced both sides twice, getting ready for the third. Each time they go out I can here them grinding and a slight feel of vibration. If you have an aggressive tire you may not feel it. Also, a bump in the road or change in speed would cause the grinding and vibration to come and go. Hope this helps. Eventually, regardless of speed or bumps it will be continuos.

[kitchene]

sounds crazy but mine was making an aweful racket when I replaced my starter and come to find out it was the cover on the torque converter hitting the flywheel. may want to check that because in retrospect once in a while under load I would hear the same sound but not as bad.

[Ford4x4Hunter]

havent done front wheel bearing only back, but i hope its not the tq cause i just replaced it but if it is i got a warranty so we will see thanks everyone