strange whining sound please help

[tazman2321]

i am working on my 06 ford explorer and there is a howling and wining sound when u put it into 4wd thought it was my tcase so tour me tcase found a bad barring so replaceed it ck the frount dif and it is ok what could be making that sound

 

[swetrid]

Ck your tires. Make sure all 4 are the same size and close to the same tread depth. If you mix and match tires on these it will mess up the transfercase.

 

[tazman2321]

tiren size are same and cked the tcase and onley does that in 4wd the t case is ok

 

[tazman2321]

is ie possible that it could be wheelbarrings

 

[tazman2321]

it onley makes that sound when u r decelarting what could it be

 

[swetrid]

It could be bearings but they wouldn't only do it in 4wd.