When do we change the transmission fluid on a 2003 lexus 430ls

There isn't one.

Our research indicates that your vehicle does not have a transmission fluid dipstick. These types of transmissions are designed to be maintenance free. In order to check the transmission fluid, your vehicle likely has check valve on the bottom of the transmission on the bottom of your car.

Transmission Fluid Level Check Lexus RX350 (2010-2015 ...

Steering Fluid

https://www.google.com/search?q=2010+lexus+RX350+steering+fluid+reservoir

and finally, your 647 page Owners Manual

Owner's Manuals ' Get to Know Your Lexus ' Lexus Canada

https://www.lexus.ca > lexus > manuals

Owner's Manuals are available online for the majority of vehicles manufactured in 2008 or later. If you don't find the manual you are looking for or you have ...

2010 Lexus RX350 - Owner's Manual - PDF (647 Pages)

https://carmanuals2.com > lexus > rx350-2010-owner-s...

2010 Lexus RX350 - Owner's Manual (647 pages). Posted on 5 Feb, 2016 by Gefitz. Model: 2010 Lexus RX350. File size: 6.1 MB. Other 2010 Lexus RX350 ...

..

You should get codes from a quick computer diagnosis from Autozone or Pepboys.
They will run a diagnostic for free in two or three minutes

NO REVERSE ON TRANSMISSION







It
can be issue with gears or problem with transmission and needs to be rebuilt.
Also get the tranny fluid checked. If it\'s low, then such problems
occurs.







To
troubleshoot these types of issues, check the actual solved problems with these
types of issues.



There
are solved help links provided below: -------



Click
the link below and go through the details and diagrams to troubleshoot the problem:
-----

2003 Lexus RX300:
Transmission Fluid Burnt Brown and not Shift to reverse?

http://whatisbyme.blogspot.in/2012/05/2003-lexus-rx300-transmission-fluid.html



-----------

2007 Chrysler 300: Transmission Stuck in Park?

http://repairhelpcenter.blogspot.in/2012/06/2007-chrysler-300-transmission-stuck-in.html



-------------

2000 Toyota Camry:
Transmission slipping and Stuck up?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-camry-transmission-slipping.html

----------

1996 Toyota Corolla: Transmission
Shift Interlock will not Release?

http://technoanswers.blogspot.in/2012/04/1996-toyota-corolla-transmission-shift.html



-------------

Lexus LS400: Transmission or Torque Converter?

http://technoanswers.blogspot.in/2012/04/lexus-ls400-transmission-or-torque.html



------------

CV AXLE stuck in Transmission?

http://technoanswers.blogspot.in/2012/04/cv-axle-stuck-in-transmission.html



------------

Transmission in reverse,
acts like it\'s in neutral?

http://schematicsdiagram.blogspot.in/2012/04/transmission-in-reverse-acts-like-its.html

------------

Delayed shift and harsh
Shifting?

http://schematicsdiagram.blogspot.in/2012/04/delayed-shift-and-harsh-shifting.html



------------

Dodge neon wont go in reverse?

http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html



-----------

Dodge Automatic transmission will not go into
reverse?

http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html



-----------

Dodge manual transmission will not go in
reverse gear?

http://technoanswers.blogspot.in/2012/02/dodge-manual-transmission-will-not-go.html



------------

Transmission is making buzzing noise?

http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html



------------

1998 Dodge Ram: Not Shift
To Reverse?

http://schematicsdiagram.blogspot.in/2012/06/1998-dodge-ram-not-shift-to-reverse.html

------------

Transmission leak on Toyota?

http://schematicsdiagram.blogspot.in/2012/02/transmission-leak-on-toyota.html



-------------

Automatic transmission,
with no reverse?

http://howtobyme.blogspot.in/2012/02/automatic-transmission-with-no-reverse.html



---------

No Movement When
Transmission is Shifted to Drive or Third?

http://schematicsdiagram.blogspot.in/2012/03/no-movement-when-transmission-is.html



---------

While going in reverse mode
Fuse number 27 blows on Ford Ranger?

http://howtobyme.blogspot.in/2012/02/while-going-in-reverse-mode-fuse-number.html



--------



These
will help.



Thanks.

It
can be issue with gears or problem with transmission and needs to be rebuilt.
Also get the tranny fluid checked. If it\'s low, then such problems
occurs.







To
troubleshoot these types of issues, check the actual solved problems with these
types of issues.



There
are solved help links provided below: -------



Click
the link below and go through the details and diagrams to troubleshoot the problem:
-----


2003 Lexus RX300:
Transmission Fluid Burnt Brown and not Shift to reverse?


http://whatisbyme.blogspot.in/2012/05/2003-lexus-rx300-transmission-fluid.html



-----------


2007 Chrysler 300: Transmission Stuck in Park?


http://repairhelpcenter.blogspot.in/2012/06/2007-chrysler-300-transmission-stuck-in.html



-------------


2000 Toyota Camry:
Transmission slipping and Stuck up?





http://whatisbyme.blogspot.in/2012/05/2000-toyota-camry-transmission-slipping.html


----------


1996 Toyota Corolla: Transmission
Shift Interlock will not Release?


http://technoanswers.blogspot.in/2012/04/1996-toyota-corolla-transmission-shift.html



-------------


Lexus LS400: Transmission or Torque Converter?


http://technoanswers.blogspot.in/2012/04/lexus-ls400-transmission-or-torque.html



------------


CV AXLE stuck in Transmission?






http://technoanswers.blogspot.in/2012/04/cv-axle-stuck-in-transmission.html



------------


Transmission in reverse,
acts like it\'s in neutral?

http://schematicsdiagram.blogspot.in/2012/04/transmission-in-reverse-acts-like-its.html


------------


Delayed shift and harsh
Shifting?


http://schematicsdiagram.blogspot.in/2012/04/delayed-shift-and-harsh-shifting.html



------------


Dodge neon wont go in reverse?


http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html



-----------


Dodge Automatic transmission will not go into
reverse?


http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html



-----------


Dodge manual transmission will not go in
reverse gear?


http://technoanswers.blogspot.in/2012/02/dodge-manual-transmission-will-not-go.html



------------


Transmission is making buzzing noise?


http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html



------------


1998 Dodge Ram: Not Shift
To Reverse?

http://schematicsdiagram.blogspot.in/2012/06/1998-dodge-ram-not-shift-to-reverse.html


------------


Transmission leak on Toyota?


http://schematicsdiagram.blogspot.in/2012/02/transmission-leak-on-toyota.html



-------------


Automatic transmission,
with no reverse?


http://howtobyme.blogspot.in/2012/02/automatic-transmission-with-no-reverse.html



---------


No Movement When
Transmission is Shifted to Drive or Third?


http://schematicsdiagram.blogspot.in/2012/03/no-movement-when-transmission-is.html



---------


While going in reverse mode
Fuse number 27 blows on Ford Ranger?


http://howtobyme.blogspot.in/2012/02/while-going-in-reverse-mode-fuse-number.html



--------



These
will help.



Thanks.

You need to remove the transmission pan to both drain the fluid and replace the filter...the filter kit should also come with a replacement gasket...you will need to check the operators manual or call the dealer to see how much trans fluid you will need to replace

The 1999-2003 Lexus RX300 models have a common failure of the engine computer that causes the harsh shifting of the transmission. You need to get the computer (ECM - Engine Control Module) rebuilt or replaced before it causes permanent damage to the transmission. Even if the transmission is already ruined, the ECM will still need to be repaired. Most often, the transmission is fine though, and rebuilding the ECM will restore the smooth shifts that the Lexus should have. Circuit Board Medics can rebuild the ECM and reprogram it so that you only have to plug it back in when you get it back. See the link below:

http://circuitboardmedics.com/1999-2003-lexus-rx300-hard-transmission-shifting-ecm-ecu-computer-repair/

ES250, ES300, SC300 AF(DEXRON-IIE (R) Automatic Transmission Fluid) Differential is serviced separately in 1990-91 ES250 and 1994 ES300.
CAPACITY, Initial Refill*:

ES250 2.5 liters 2.6 quarts
Dry fill capacity: 6.5 qt. (6.2 liters)

Depending on the milage, I think you may have both going back, take to auto zone for free diagnosis.

If you haven't already, try draining the transmission fluid and replacing it with new. It's recommended to complete this service every 60,000 miles. Also try adding Rislone transmission additive. It worked wonders on my Ford Escape! If you have the fluid changed by someone else, it's advisable to NOT flush the system. The pressure caused by vacuuming it out could create more harm than good.