"Fixed" my transmission - you will NOT believe this!!
03-21-12, 10:25 AM
#46
gte & na-t
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I went through 3 tranny also from lexus, and then the last time they told me i needed a new throttle body $1600 lol i took my car home and replaced the battery and clean the throttle body.
I didnt see this thread at that time, but my battery was acting funny and as soon as i replaced the battery the car has been doing great with no complain!!
I didnt see this thread at that time, but my battery was acting funny and as soon as i replaced the battery the car has been doing great with no complain!!
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OkiStash (02-25-22)
03-21-12, 03:21 PM
#48
Lead Lap
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I went through 3 tranny also from lexus, and then the last time they told me i needed a new throttle body $1600 lol i took my car home and replaced the battery and clean the throttle body.
I didnt see this thread at that time, but my battery was acting funny and as soon as i replaced the battery the car has been doing great with no complain!!
I didnt see this thread at that time, but my battery was acting funny and as soon as i replaced the battery the car has been doing great with no complain!!
03-21-12, 09:02 PM
#50
Welcome to the world of multiplexing. And yes, nearly every modern car is multiplexed to some extent or another.
Most specs are now below 9 volts sometimes even 7 volts to make things less sensitive to this so I would guess a more modern car is a little less susceptible (last 5 years)
Here is an article
http://www.motor.com/magazine/pdfs/072001_11.pdf
Most specs are now below 9 volts sometimes even 7 volts to make things less sensitive to this so I would guess a more modern car is a little less susceptible (last 5 years)
Here is an article
http://www.motor.com/magazine/pdfs/072001_11.pdf
Last edited by sam12345; 03-21-12 at 09:18 PM.
01-24-22, 11:02 PM
#52
I agree, I'm glad that you've fixed your problem, but why have you needed to go through so many batteries? I can't imagine that a 430, which let's say is an 01' like mine, you shouldn't have to replace your battery at 27k... and again at 45k, and then again at 85k... I have replaced my factory battery once, and on mine and I have 133k, but I also haven't had any tranny issues. I am not saying they aren't related, but your battery should last for about 5-7 years, depending on the condition it lives in, so maybe in CA they go a lot more regularly than in MN.
The alt spins, with the crank, since they are sharing the same belt. The alternator is creating way more than 14 volts, however due to regulators it is reduced to allow the battery to charge and maintain the 12v source that powers all the cars accessories. I am just skeptical of either an alternator or a battery going out within 27k, and again at 45k, and again at 85k.
Just a point of reference, 12.6 is a full battery, >11.6 is a dead battery, mostly likely it will not turn the car over. And, I am no expert, I just work at the "stealership", and try to help people solve their problems.
The alt spins, with the crank, since they are sharing the same belt. The alternator is creating way more than 14 volts, however due to regulators it is reduced to allow the battery to charge and maintain the 12v source that powers all the cars accessories. I am just skeptical of either an alternator or a battery going out within 27k, and again at 45k, and again at 85k.
Just a point of reference, 12.6 is a full battery, >11.6 is a dead battery, mostly likely it will not turn the car over. And, I am no expert, I just work at the "stealership", and try to help people solve their problems.
01-25-22, 01:40 PM
#53
Great to get this info out there. Thanks for posting this up!
Guys with transmission problems or really any other ones... I'd clean your battery terminals first before replacing your battery
Guys with transmission problems or really any other ones... I'd clean your battery terminals first before replacing your battery
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QLex300 (01-26-22)
01-25-22, 10:31 PM
#54
I checked mine it looks clean af. I even disconnected both battery terminals n put back on. Read it should of reset the ecu. But still no change. Going to hook up my car to a scanner to see exactly wats going on. Hopefully it points me in some direction since I'm new to the auto trans world.
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QLex300 (01-26-22)
01-26-22, 08:51 AM
#55
I had a similar experience. My transmission was sometimes indecisive about shifting. The car still started OK, so I never thought about the battery. Then finally the battery was having trouble starting, so I got a new one. The car started great and voila! the transmission issues disappeared.
My theory is that the shift solenoids require so much juice that a sub optimal battery has trouble supplying enough. So the shifting gets iffy. Low electrical power may also affect the computers that control, well, pretty much everything in a modern car. It's a bit of an adjustment for those of us who started out with cars where as long as the car started, the battery was OK.
I had a similar experience with another modern car that had a very slight miss when cold. As soon as I got a new battery, the miss went away.
My theory is that the shift solenoids require so much juice that a sub optimal battery has trouble supplying enough. So the shifting gets iffy. Low electrical power may also affect the computers that control, well, pretty much everything in a modern car. It's a bit of an adjustment for those of us who started out with cars where as long as the car started, the battery was OK.
I had a similar experience with another modern car that had a very slight miss when cold. As soon as I got a new battery, the miss went away.
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QLex300 (01-26-22)
02-06-22, 11:59 AM
#56
I had a similar experience. My transmission was sometimes indecisive about shifting. The car still started OK, so I never thought about the battery. Then finally the battery was having trouble starting, so I got a new one. The car started great and voila! the transmission issues disappeared.
My theory is that the shift solenoids require so much juice that a sub optimal battery has trouble supplying enough. So the shifting gets iffy. Low electrical power may also affect the computers that control, well, pretty much everything in a modern car. It's a bit of an adjustment for those of us who started out with cars where as long as the car started, the battery was OK.
I had a similar experience with another modern car that had a very slight miss when cold. As soon as I got a new battery, the miss went away.
My theory is that the shift solenoids require so much juice that a sub optimal battery has trouble supplying enough. So the shifting gets iffy. Low electrical power may also affect the computers that control, well, pretty much everything in a modern car. It's a bit of an adjustment for those of us who started out with cars where as long as the car started, the battery was OK.
I had a similar experience with another modern car that had a very slight miss when cold. As soon as I got a new battery, the miss went away.
02-07-22, 08:54 AM
#57
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