hi there good people i just bought a 1997 f150 4.6 v8 super cab and i have a weird noise that i think that comes from the transmission when i put in reverse and accelarate a little it makes noise like a grinding noise and it is pretty loud,sometimes it does in drive as well,i checked the transmition fluid level and it has a lot of fluid it has double than it should,can someone give me some opinions,should i replace my transmission,by the way my engine is the 4.6 v8 and has 370.000 dont know if this engines last long kms,but it seems it is running good.thanks to all of you in advance

 

sorry i forgot to say that it is a 4x4