The Lexus LS400 was equipped with the A650E transmission in most models. But they aren’t without their problems though, so let’s look at some of the most common Lexus LS400 transmission problems, look at cost estimates and figure out what you can do about them.
Lexus LS400 Transmission Models
Lexus LS400: A650E Transmission
Lexus LS400 Transmission Replacement Cost Estimate
Pricing varies by model. To be 100% sure on pricing, have your VIN# handy and use our Get An Estimate feature to look up your transmission by VIN#.
What are the DTC codes related to Lexus LS400 transmission problems?
|P0711||Transmission Fluid Temperature Sensor Circuit Range/Performance|
|P0714||Transmission Fluid Temperature Sensor Circuit Intermittent P0715|
|P0715||Input/Turbine Speed Sensor Circuit|
|P0750||Shift Solenoid 'A'|
|P0753||Shift Solenoid 'A' Electrical|
|P0755||Shift Solenoid 'B'|
|P0758||Shift Solenoid 'B' Electrical|
|P0760||Shift Solenoid 'C'|
|P0763||Shift Solenoid 'C' Electrical|
|P0768||Shift Solenoid 'D' Electrical|
|P0770||Shift Solenoid 'E'|
Lexus LS400 Transmission Recalls
Lexus LS400 Technical Service Bulletins (TSB)
Common Lexus LS400 Transmission Problems
Lack of Response
Grinding or Shaking
Whining, Clunking or Humming
Refuses to Go Into Gear
Torque Converter Issues
Valve Body Issues
Transmission Noisy in Neutral
No 3rd or 4th Gear
No 1st or 2nd Gear
Trouble Codes / Check Engine Light
Can I drive with a transmission problem?
If your Lexus LS400 can still make it up and down the road, you might say “It’s fine, I’ll just drive it until I can get it fixed”. But that is not always a good idea, depending on the symptoms. You see, there are a lot of (very expensive) moving parts inside of a transmission, and if something isn’t right, continuing to drive with a transmission problem could damage something else.
How often does a Lexus LS400 transmission need to be replaced?
The overall lifespan of a Lexus LS400 transmission largely depends on how well it was maintained. Factory design flaws also factor into this equation, along with how/how hard you drive. But on average, we’ve seen the Lexus LS400 transmission last for between 130,000-180,000 miles. A high quality replacement transmission however, can last considerably longer if all of the factory design flaws have been addressed and the vehicle has been maintained.
How are Lexus LS400 transmission issues diagnosed?
It is fairly easy to guesstimate what the root cause of your Lexus LS400 transmission problems might be, but you won’t truly know unless you have the right tools and experience. A good mechanic or transmission repair center will be able to connect your truck to a computer and find out which diagnostic trouble codes (DTC’s) have been stored. Once they know what to look for, they can perform a visual inspection to verify the problem.
How is a Lexus LS400 transmission replaced?
In order to replace your Lexus LS400 transmission, the truck has to be lifted from the ground in order to gain access to all of the parts that will need to be unbolted. Then the transmission can be lowered to the ground (typically with a transmission jack), so the new transmission can be installed.
Recommendations for Lexus LS400 transmission issues?
To save time and get back on the road faster, have your 17-digit truck VIN# handy and you can get an online quote for a reman Lexus LS400 transmission here, then find a local shop using our Find a Shop guide to install it for you.
How to Solve Lexus LS400 Transmission Problems
Solution A: Buy a Used Lexus LS400 Transmission
The quickest way to fix your transmission problems is to simply buy a used transmission or used transmission. These can be found at most junk yards, and they often come with a 30-90 day warranty. However, there’s no way to determine the actual condition of the internal components, so you could be spending a bunch of money to have the exact same problems. Plus, that warranty only covers the transmission if it’s defective, not the labor costs that you’ll have to pay.
Solution B: Buy a Rebuilt Lexus LS400 Transmission
Another option would be a rebuilt transmission or rebuilt transmission. A local repair shop will remove your transmission, then install a bunch of new parts during the rebuild. The problem here is, the skills and experience of each transmission rebuilder will vary widely from shop to shop, so you could have problems from something that wasn’t adjusted properly. And the 1-2 year warranty might only cover you at certain transmission repair shops, in a specific geographical area.
Solution C: Buy a Remanufactured Lexus LS400 Transmission
Many owners depend on their vehicle to commute and get things done. Their gasoline engines are designed to go 100’s of thousands of miles, so it makes sense to invest in a remanufactured transmission.
What Problem Does Your Lexus LS400 Have?
Let us know the year, mileage and problem you’re having as well as any trouble (OBD) codes you’ve found. If you’ve been given a quote or paid for a repair, we’d like to hear about that too!