Buzzing in 4th gear

friends, I put my car in full maintenance, supposedly full mus I understood that I made it in the special service, I spilled 1500 TL, when I bought the car when the car was idle, there was a noise, it sounded like a fan sound, when I pressed the clutch, it was going to go to the master. we said

Anyway, this is the last day of 3-4 days, when I return home yesterday, when I press the throttle in 4th gear, there is a whistling sound and noise, it increases with my throttle.

I was really surprised what I was going to do, but I don't want to sell my car, but I don't want to sell,

What do you think I should do about the noise in this gear? Someone with a lack of transmission oil or someone with experience will be able to help me with knowledge :(

I thank everyone individually.

Friends, if the transmission oil is missing, do you know which brand of oil to which grade?

My vehicle 307 xsi 2.0 136 hp gasoline

What was done in full care, hodja?

In other words, the valve cups have changed piston ring and full set gasket when we say full maintenance.

[QUOTE = EB] friends put my car in full view, supposedly full mus I understood this I made it in the special service, I spilled 1500 TL when I first bought the car when the car was idle, there was a sound like it sounded like a fan sound when I asked the master when the clutch ball was not used for 3-4 days. said we'll look at the sanzim

Anyway, this is the last day of 3-4 days, when I return home yesterday, when I press the throttle in 4th gear, there is a whistling sound and noise, it increases with my throttle.

I was really surprised what I was going to do, but I don't want to sell my car, but I don't want to sell,

What do you think I should do about the noise in this gear? Someone with a lack of transmission oil or someone with experience will be able to help me with knowledge :(

I thank everyone individually .. [/ QUOTE] My teacher missed the gearbox oil may be missing from the seals. or there are 4 bearings in the gearbox, their life may have expired, this situation happened to me. but I would like to see the first transmission oil

My mood is turned upside down when you write like this, my head will be relieved. which brand ?