Huge Mistake? Transmisison problems flush?
Lexus Champion
Joined: Apr 2019
Posts: 11,196
Likes: 1,582
From: FL
Thank you 430 for sharing the links I enjoyed the first 2 videos and I will watch the rest later.
The shop I worked at forbided flushing the transmission we could only do repeat fluid/filter services
(included dropping the pan and cleaning the magnets of course) to cycle the new fluid in
gently with mileage between the services.
We never had a customer return to say we destroyed their transmission by doing this.
If a tranny didn't go in gear we would check the basics like shift linkage and selenoids.
But if a customer came in with a slipping tranny or the fluid was burnt and smelled we wouldn't
touch it and send them down the road to AAmco. lol
I'm not saying it's bad to do a complete flush I've always wanted to try it but I do repeat drain
and fills instead. It's not perfect and I am happy people have had great success with flushes and
maybe some day I will try it for fun.
The shop I worked at forbided flushing the transmission we could only do repeat fluid/filter services
(included dropping the pan and cleaning the magnets of course) to cycle the new fluid in
gently with mileage between the services.
We never had a customer return to say we destroyed their transmission by doing this.
If a tranny didn't go in gear we would check the basics like shift linkage and selenoids.
But if a customer came in with a slipping tranny or the fluid was burnt and smelled we wouldn't
touch it and send them down the road to AAmco. lol
I'm not saying it's bad to do a complete flush I've always wanted to try it but I do repeat drain
and fills instead. It's not perfect and I am happy people have had great success with flushes and
maybe some day I will try it for fun.
Instructor
Joined: Jun 2019
Posts: 1,056
Likes: 210
From: Florida
Thank you 430 for sharing the links I enjoyed the first 2 videos and I will watch the rest later.
The shop I worked at forbided flushing the transmission we could only do repeat fluid/filter services
(included dropping the pan and cleaning the magnets of course) to cycle the new fluid in
gently with mileage between the services.
We never had a customer return to say we destroyed their transmission by doing this.
If a tranny didn't go in gear we would check the basics like shift linkage and selenoids.
But if a customer came in wit Hearh a slipping tranny or the fluid was burnt and smelled we wouldn't
touch it and send them down the road to AAmco. lol
I'm not saying it's bad to do a complete flush I've always wanted to try it but I do repeat drain
and fills instead. It's not perfect and I am happy people have had great success with flushes and
maybe some day I will try it for fun.
The shop I worked at forbided flushing the transmission we could only do repeat fluid/filter services
(included dropping the pan and cleaning the magnets of course) to cycle the new fluid in
gently with mileage between the services.
We never had a customer return to say we destroyed their transmission by doing this.
If a tranny didn't go in gear we would check the basics like shift linkage and selenoids.
But if a customer came in wit Hearh a slipping tranny or the fluid was burnt and smelled we wouldn't
touch it and send them down the road to AAmco. lol
I'm not saying it's bad to do a complete flush I've always wanted to try it but I do repeat drain
and fills instead. It's not perfect and I am happy people have had great success with flushes and
maybe some day I will try it for fun.
And, why should one risk possible trouble by flushing a transmission on an old car one owns instead of less risky drain/replace if wanting fresh fluids.
Do have a question; if it is not good to mix different types of transmission fluid, how can not mixing different types of trans fluids even be possible when using the same machine to do flushes for different cars using different fluid types?
Lexus Champion
Joined: Apr 2019
Posts: 11,196
Likes: 1,582
From: FL
Thinking forbidding flushing is a sound shop policy. Thinking drain and refill less risky as per your shop. e.g. Couldn't flushing a transmission which has damaged transmission material in it may mess up the valve body. Or, a customer could bring a failing transmission in, then blame a flush for problems already present. Why expose the shop to potential troubles associated with doing flushes.
And, why should one risk possible trouble by flushing a transmission on an old car one owns instead of less risky drain/replace if wanting fresh fluids.
Do have a question; if it is not good to mix different types of transmission fluid, how can not mixing different types of trans fluids even be possible when using the same machine to do flushes for different cars using different fluid types?
And, why should one risk possible trouble by flushing a transmission on an old car one owns instead of less risky drain/replace if wanting fresh fluids.
Do have a question; if it is not good to mix different types of transmission fluid, how can not mixing different types of trans fluids even be possible when using the same machine to do flushes for different cars using different fluid types?
I noticed people were saying even the OEM dealers are turning people away
for tranny service with this lifetime fluid and filter(really just a screen) craziness
but I think it could be a liability thing too or maybe in part I don't really know.
PS- I have never seen one of those fuild fluch machines in action so I have no idea.
Maybe others know?
Last edited by Margate330; Dec 29, 2019 at 05:29 PM.
Advanced
Joined: Sep 2001
Posts: 713
Likes: 17
From: Virginia
First, I would then check the level at while it is hot and idling.
Second thing I would do is find out exactly how the flush was done and what ATF was used to refill.
Third thing I would do is to not add any other concoctions to the transmission. I only use Toyota T-UV (or WS in my newer Lexus)
I would then do a couple drain and fills over the next few days with Toyota T-IV. Somebody here should know if you need to clean/check the transmission filter. I don't think it's necessary but I'm not sure.
If this hasn't fixed your problem, you need someone who can actually do a diagnosis before removing the transmission. Once the transmission is removed, all diagnosis is over. You will get a "new" transmission. A questionable transmission shop won't diagnose and want to get your transmission out as quick as possible. Then you are at their mercy.
Second thing I would do is find out exactly how the flush was done and what ATF was used to refill.
Third thing I would do is to not add any other concoctions to the transmission. I only use Toyota T-UV (or WS in my newer Lexus)
I would then do a couple drain and fills over the next few days with Toyota T-IV. Somebody here should know if you need to clean/check the transmission filter. I don't think it's necessary but I'm not sure.
If this hasn't fixed your problem, you need someone who can actually do a diagnosis before removing the transmission. Once the transmission is removed, all diagnosis is over. You will get a "new" transmission. A questionable transmission shop won't diagnose and want to get your transmission out as quick as possible. Then you are at their mercy.
CL Community Team
Joined: Dec 2005
Posts: 2,703
Likes: 826
From: 565 St Peter NOLA
First, I would then check the level at while it is hot and idling.
Second thing I would do is find out exactly how the flush was done and what ATF was used to refill.
Third thing I would do is to not add any other concoctions to the transmission. I only use Toyota T-UV (or WS in my newer Lexus)
I would then do a couple drain and fills over the next few days with Toyota T-IV. Somebody here should know if you need to clean/check the transmission filter. I don't think it's necessary but I'm not sure.
If this hasn't fixed your problem, you need someone who can actually do a diagnosis before removing the transmission. Once the transmission is removed, all diagnosis is over. You will get a "new" transmission. A questionable transmission shop won't diagnose and want to get your transmission out as quick as possible. Then you are at their mercy.
Second thing I would do is find out exactly how the flush was done and what ATF was used to refill.
Third thing I would do is to not add any other concoctions to the transmission. I only use Toyota T-UV (or WS in my newer Lexus)
I would then do a couple drain and fills over the next few days with Toyota T-IV. Somebody here should know if you need to clean/check the transmission filter. I don't think it's necessary but I'm not sure.
If this hasn't fixed your problem, you need someone who can actually do a diagnosis before removing the transmission. Once the transmission is removed, all diagnosis is over. You will get a "new" transmission. A questionable transmission shop won't diagnose and want to get your transmission out as quick as possible. Then you are at their mercy.
Mobil1 3309
Aisin T4
ToyotaT-IV
The above listed are the only real T-IV equivalents for 01 to 03 LS430s. (Toyota WS for 04 to 06)👍
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!
Michael S. Palmer
10 Best Lexus Models No One Remembers
Joe Kucinski
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing
Michael S. Palmer
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation
Joe Kucinski
Lexus LC500 Convertible Auction: A Preview of Rising Values?
Brett Foote
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler
Michael S. Palmer
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)
Joe Kucinski
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!
Brett Foote
Lead Lap
Joined: May 2006
Posts: 3,682
Likes: 304
. Jayydela. You are the 3rd member on this forum that has attested to having Trans X keep their Transmission working. How many miles have you driven after adding the Trans X?
2nd gear
Joined: Jul 2024
Posts: 2
Likes: 0
Drop the pan and inspect what is going on, pull codes if you have any and inspect the filter to see if it is plugged up. Ohm rest the solenoids to make sure they are working properly, if that fails or there are large metal bits then it's probably dead and needs to be rebuilt.
Im sending the car over to the mechanic in a few days for the inspection.
Thread
Thread Starter
Forum
Replies
Last Post
