95 Lexus SC300 Overdrive Issue
#1
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95 Lexus SC300 Overdrive Issue
Hello everyone! I seem to be having trouble with my Lexus automatic transmission. First off there are no cel's or anything unusual lighting up in the dash. When i get up to about 50-60 mph my car will not shift into overdrive properly. It will high rev doing 60 for about 10-15 seconds and the shift into overdrive. Then about 10 seconds later it shift back up into 3rd gear. It keeps doing this cycle for about a minute and then stops when its in 3rd gear and then about 5 minutes later do the same thing all over again. The car did have to much transmission fluid in it so i drained some and put a quart back in it to get it to the proper level. The transmission fluid that came out did look a little on the dark side but didn't smell burnt it smelt normal. Idk when the last time they changed the fluid or filter for the transmission either. I also had the ecu taken out and sent of to tanin electronics to put new capacitors in it a while back. My question is has anybody else had this problem and maybe a solution? Could bad tranny fluid cause this? Also my O/D light is not blinking on and off. Thanks in advance!
Forgot to mention the car only has 127k on it.
Forgot to mention the car only has 127k on it.
Last edited by NikXtreme; 01-29-16 at 08:51 PM.
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mkimura123 (09-22-20)
#2
Driver School Candidate
Thread Starter
ReCap:
I did a transmission drain and changed the filter also. I inspected the magnets and i didnt see any metal shavings on them. The fluid was a darker red color but did not smell burnt. I went ahead and did a ohm reading on the 3 solenoid's that were there. 2 of them read 12.5 Ohms and the third read 13 ohms. I think these are good solenoid's. I drove the car but it did not fix the problem yet.
I did a transmission drain and changed the filter also. I inspected the magnets and i didnt see any metal shavings on them. The fluid was a darker red color but did not smell burnt. I went ahead and did a ohm reading on the 3 solenoid's that were there. 2 of them read 12.5 Ohms and the third read 13 ohms. I think these are good solenoid's. I drove the car but it did not fix the problem yet.
#3
Driver School Candidate
Thread Starter
I have another Recap:
While driving at around 60 mph when the transmission is hot i can tap on the brakes and the car will shift into overdrive for about 5 seconds and shift back into 3rd gear. It doesn't matter if the car is in cruise control or not. If i repeat this process and after tapping on the brakes and the car shifts into overdrive and if i maintain the current speed without pushing in the gas pedal to hard it will stay into overdrive but if i accelerate to much it will kick out of overdrive. Anbody got any suggestions?
While driving at around 60 mph when the transmission is hot i can tap on the brakes and the car will shift into overdrive for about 5 seconds and shift back into 3rd gear. It doesn't matter if the car is in cruise control or not. If i repeat this process and after tapping on the brakes and the car shifts into overdrive and if i maintain the current speed without pushing in the gas pedal to hard it will stay into overdrive but if i accelerate to much it will kick out of overdrive. Anbody got any suggestions?
#5
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Trans not shifting into overdrive
I had the same issue. Trans would shift into and out of overdrive. It would only do it during the summertime when its hot outside. I sent my ECU off to have it repaired and that didn't work. I purchased a Lexus remanufactured one off ebay and have not had a single problem.
Hope this helps.
1993 Lexus SC300 with 260,000 miles.
Thanks
Ryan
Hope this helps.
1993 Lexus SC300 with 260,000 miles.
Thanks
Ryan
#6
Driver School Candidate
Overdrive
More question than any bit of help. I was driving down the interstate at about 75. When it felt like if somebody pressed the overdrive off button. Now if I hit the button it doesn't seem like anything happens. Would this possibly be an ECU issue also
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lserlohn
RX - 1st Gen (1999-2003)
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06-06-16 05:45 PM