My Lexus RX300 1999's transmission slips recently. I changed the fluid and clean the filter also put Stop Slip in the trans box then it can go for 3 minutes. The L gear totally stop working and the ot

It's worth a try. I would suggest Trans-X. Do a fluid and filter change and add 1 quart of Trans-X instead of a quart of fluid. Then drive the car on a road trip. Get about 100 miles on it and check the fluid level. The Trans-X is mostly solvent and will evaporate off rather quickly, say within the first week, and then top off the fluid. If it doesn't work, you will be looking at a rebuild or replacement with a good used unit.

check your trans fluid, if its been a while flush it and change the filter if its reving and your speed doesnt change (slipping) if your speed changes check the TPS and speed sensors on the trans as well when you change fluid.

You change transmission fluid every 3 years

While 90k is only 54,000 miles, ten years is how
old my lincoln is & I changed mine 3 times & it should
have been 4 times

You go by years, not miles anymore

Time used is heat cycles & the fluid will only last
for 3 years including 2 hot summers ,then it won't
remove heat & you trans clutches fail

You have to use the NEW Matic S from a nissan dealer,
as no other fluid is correct for your jatco trans at this point
in time

You add one ten oz bottle of red Lubegard to ALL your vehicles
transmissions with every change

You DO NOT FLUSH a trans as the fine debrib could get
into the solenoids

You have to add a return line filter at the cooler in front of the radiator, because your trans has NO Filter, only a screen bolted to the valve body

Same trans as my 3 week old 2014 Frontier

What you read was IF it was slipping & you change the fluid
it will slip worse,in that case the damage was done already

Ten years is a death sentence to any trans
Change it anyway,not many miles on it

Don't change it if you got shifting problems you don't want
to discuss here & that is why your here

You remove the pan on the bottom of the trans
Wipe it out,clean the magnet & you should have a
fill tube & stick next to the motor to add the MATIC S
Fluid

The return line filter will be your ONLY protection for that
Nissan trans, as a screen is not going to stop anything micro
scopic particles ,nor will a regular filter on most transmissions

You get a Filtran Magnetic Return Line Filter & install
that on the line that goes from the surface to air cooler to the
trans case

The other line you can see goes to the radiator first, then to the
out front cooler,that is the hot oil pressure feed,your putting
you little round filter in the other return line

You can put one of them on the power steering also or change
a steering rack when it fails
Have to do that or new racks are not warranteed

Hi Lb,
My car is RX300 1999 and has the same problem. I changed the fluid 2 years ago after the trans slip and lost the shift. Afterwards it worked for another 2 years. But recently it doesn't work again even I change fluid and put Stop Slip additive to the trans. I was told the trans has to be rebuilt. So changing fluid and filter can help to maintain the trans for sure and can prevent problem. But if the trans has already worn a lot, it can't help at last.

check your rear main seal. Also try changing your trans fluid, trans filter, and your transmission pan seal. I recommend you put lucas transmission oil in it and a quart of the Lucas Stop Slip and leak sealer

If you have gone to a shop to have your transmission maintained, I would get them on the phone immediately. Foreign cars, especially shiftronic trans. usually use different fluids. If they have put the wrong fluid or forgotten a filter, etc., you may have a destroyed system. Double check with your fluid type and the type inserted in your vehicle.

Change fluid and filter soon.

auto trans operates on fluid pressure. if the trans has never been serviced, more than likely the filter is plugged, and or the fluid is bad. no doubht its burned and will smell and look like it. get it towed to a shop and have the fliud and filter changed first, then check the band adjustment.recommend a trans shop do it and not jiffylube.

My 2003 Siverado has 65.000 miles on the automatic tranny. It is starting to slip going from 2nd gear into 3rd gear. Do I needa rebuild or what?. Thanks.

Have the vehicle scanned for diagnostic trouble codes,and repair any codes.More than likely the trans needs a rebuild.If the fluid smelled burnt,then obviously clutches or bands are burnt inside the trans.Changing the fluid just got rid of the smell,whatever is burnt is still hurnt.It is best to stop driving the vehicle,as continuing to drive it will just cause more damage to whatever is damaged.Those transmissions are prone to pump problems too.