i have 04 4 x 2 f150 4.6.....75 k

i got some kind of slippage in the rear left/possible right..... the vehicle drives fine but some times at slow speed taking turns i fell slippage. no problem driving forward or reverse.....only sometimes taking turns.....no noises or gear grinding. what do u thing??????

all fluids changed on regular basis

 

The rear end needs both the 90/80w gear oil, but it also takes a clutch chatter additive so your rear end clutch plates do not slip where you can now hear the action. They still break free as designed. You are hearing them slip only turning, not forward and reverse.
That is what it sounds like [rear end clutch chatter] when driving straight does not make the noise.

So, if you replaced fluids like you said and did the rear end pumpkin flush and clean, did not add the clutch chatter additive, then ask the dealer for that tiny bottle and just pour it in. The tube is not that much but about 3 more ounces give or take.

 

thanks for info......do u know where i can get the additive and whats it called