A833 noise

[John Milner]

The 4 speed in my charger has a strange noise when I let off of the gas or downshift. It sounds kind of like a rough bearing. It sounds great when I'm driving normally and shifting up. Would a main shaft or input shaft bearing cause a noise when downshifting or decelerating? I did not rebuild the transmission. It had not been in a car for about 40 years. I only changed the oil before I installed it in my car.

[c00nhunterjoe]

Are you sure the noise is coming from the trans? And regarding the oil, make sure you are usuing a legitimate gl4 only oil. If it is gl5 rated, it is not meant for that trans.

[John Milner]

It sure seems to be where the noise is coming from.  As far as gear oil, I'm running a GL4 rated 80w90 gear oil.  The transmission shifts great with it.  It's just strange that it is so quiet accelerating but when I let off of the gas or downshift, it make the noise. 

[c00nhunterjoe]

Is it in every gear? If not, which gears.

[John Milner]

It is in every gear when I decelerate or let off of the gas in gear.

[70 sublime]

My car is an automatic
I was getting a noise when I let off the gas
Ended up changing the universals in both ends of the drive shaft
Noise went away

[73rallye440magnum]

As 70 sublime mentioned-

First thing that came to mind after reading your description is driveshaft u-joint(s).

If you find they are bad, I'll trade ya cars 

[A383Wing]

I had a similar noise decades ago...turned out to be the rear gears...completely quiet while accelerating....very noisy under decelerating