powerboat

aah that way... sorry,
than i mean fluid, cause the current fluid is just old.

Aerovette

Ok some better/clearer details are needed here.

Do you know for a fact that something OTHER THAN transmission fluid was put in the transmission?

Do you know what was put in there?

If it was some sort of quick fix transmission treatment, you are ok. If it was anything NOT intended for a transmission, you have a serious problem that will ultimately be expensive or leave you stranded if you continue to drive.

powerboat

no no it's ATF.
its hard for me to make things clear as im not a good english writer

vader86

We know youre not native english.

Go forward with the flush of the transmission fluid, and tell them to use a good Dexron III fluid, then report back on how the transmission behaves in normal driving. We need you to be specific so that we can recommend something, if anything.

Aerovette

Ok, if you are certain ONLY ATF has been put in there, that's a start. For a car that age, I don't recommend a full flush. The detergents in the new fluid can make things worse. Change as yo normally would by dropping the pan. Now you can do this again more frequently than the service recommendation. If there is anything unusual in the pan, you may need to have repairs done.

What should NOT be there...
metal fragments or filings
Gray sludge or mud.
It should not smelled burned.

What is acceptable...
A light gray film coating the entire bottom of the pan
Fluid should be pinkish red, NOT brown. The brighter the red, the better.

The transmission engaging in gear hard could be a lot of things. High idle, U-joints, brake calipers changing direction, differenmtial play, pinion bearing, bad transmission mount. Any number of things. You'll just have to keep isolating things until you narrow it down. Some of the troubleshooting can be very unsafe. I've done some bad stuff that could really hurt you or kill you so whatever you do be careful.

I will tell you what I have done. I am not telling YOU to do it, but I have.

With the car WELL SUPPORTED on jack stands and running have someone move the selector from park to drive and see if the noise can be heard from underneath. Make SURE they apply the brakes before going back in to park. They can do this several times while listening in various areas for the noises.

With everything shut off and not running, rotate the drive wheels back and forth and see if you hear any noise. Basically keep trying different things until you pinpoint at least the AREA that it is coming from.

Good luck.

Aerovette

Choose for yourself.

http://mdhmotors.com/transmission-fl...-transmission/

http://transmissionrepairguy.com/tra...-fluid-change/

https://mechanics.stackexchange.com/...older-vehicles





.

powerboat

Thanks.
i do know how to do a oil/fluid change.
but i thought there was a different fluid in the transmission.
it turns out its just old ATF.
now i only need to know if there was a shift kit installed or not

Aerovette

I can understand that you may be curious, but why does it matter if there is a shift kit in it? Are you asking because you may need an additive or special fluid?

I know English is not your first language and you actually are doing well, but i am uncertain about what you are wanting to accomplish.

Is the transmission working properly?
Does the fluid smell burned?
Is this just a maintenance item you want to take care of?

powerboat

Noo i don't think there is anything wrong,
BUT, my other cars are also automatic and you don't feel it when you put it in gear.
in my corvette, it "claps" in gear, so i am only wondering if it is a shift kit or a bad transmission.

Aerovette

Possibly neither.

What horsepower/torque are your other vehicles?

I don't really know a "clap" sound related to a car. I assume it is a higher clicking sound as opposed to a deeper thump.

I'd still suspect pads changing direction from backing up to going forward, or from park to drive.

powerboat

it is a little hard to explain, i think a video will be better.
maybe a clap is not the best word for it.
as soon as i put it from park or neutral in gear, it takes a second, and than it just "clunks" in gear and the car "shocks"

vader86

As I stated, it sounds more like U-joint failure on the driveshaft.

Aerovette

Could very well be. The only way to know is to investigate. Our speculating isn't going to get anywhere. If he wants to do it himself, I'm sure you and I both realize the safety risk.