I asked about this about the same time last year, and the car is still doing this. After I rebuilt the transmission, when the temperature drops below freezing, the car will stay in the same gear for a second after the shift selector has been moved. For example, when I am backing out of my spot in the morning, when I put the gear selector into drive, it will still be engaged in reverse for probably a little less than a second, then go into the selected gear. It will do this for about the 1st minute of operation, then it will work correctly. I changed the fluid to Mobil 1 last year around this time, thinking it was the fluid viscosity and it did not fix it. It is a very minor and I know that it will not harm the transmission as I have about 35k miles on the transmission and it works very well still. I was just curious what on earth could cause this? thx guys!
Transmission Quirks
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Excessive clutch pack clearance.
I had a quirky acting transmission in my Hyundai... Similar problem to yours, slugish shifting in the winter etc... I changed to AMSOIL ATF which is a full synthetic with a very low temperature pour point and all went away... Good luck!
When shifting from D to R, or vice versa especially in the winter time when the car is still cold, I found that a 1 or 2 second pause in N always seemed to help. It has become habit now, whenever I shift from D to R, or R to D I always pause slightly in the N position. Not sure if this will help you or not but its worth a try.
how would excessive clutch pack clearance do that? I'm not questioning u, I just dont understand the how the auto transmission works.
I had this issue on the Civic when I used to park it outside. Now that it's indoors, I still wait a second after shifting, but the problem has gone away.
MolaKule
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When shifting from D to R, or vice versa especially in the winter time when the car is still cold, I found that a 1 or 2 second pause in N always seemed to help. It has become habit now, whenever I shift from D to R, or R to D I always pause slightly in the N position.
This is always a good practice to reduce drive line shock.
You didn't say what vehicle or transmission but I think you may have a burr or rough spot on a valve or a sluggish solenoid.
When shifting from D to R, or vice versa especially in the winter time when the car is still cold, I found that a 1 or 2 second pause in N always seemed to help. It has become habit now, whenever I shift from D to R, or R to D I always pause slightly in the N position.
This is always a good practice to reduce drive line shock.
You didn't say what vehicle or transmission but I think you may have a burr or rough spot on a valve or a sluggish solenoid.
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oh, its a rebuilt A541E on a 97 Toyota Avalon.
Originally Posted By: StevieC
I had a quirky acting transmission in my Hyundai... Similar problem to yours, slugish shifting in the winter etc... I changed to AMSOIL ATF which is a full synthetic with a very low temperature pour point and all went away... Good luck!
I had the same thing on my Turbo 350, in the very cold weather there was a delayed shift when I used Mobil 1 ATF.
I went to Redline D4 ATF, and the same thing.
When I went to the Amsoil ATF the transmission shifted great in the cold weather, it shifted the same whether the transmission was cold or warmed up.
I had a quirky acting transmission in my Hyundai... Similar problem to yours, slugish shifting in the winter etc... I changed to AMSOIL ATF which is a full synthetic with a very low temperature pour point and all went away... Good luck!
I had the same thing on my Turbo 350, in the very cold weather there was a delayed shift when I used Mobil 1 ATF.
I went to Redline D4 ATF, and the same thing.
When I went to the Amsoil ATF the transmission shifted great in the cold weather, it shifted the same whether the transmission was cold or warmed up.
Excessive clearance= more fluid volume needed to apply. Gets noticable when cold due to increased fluid viscosity. If it took longer to apply when warm, then you would suspect an internal fluid leak.
Disclaimer: There might be other causes, but the transmissions/transaxles I have experience with, excessive clutch clearances were the main cause of those symptoms. Heck, you might have some strange valve body problem (sticking valve/small leak letting air into the valve body when off etc.)
Disclaimer: There might be other causes, but the transmissions/transaxles I have experience with, excessive clutch clearances were the main cause of those symptoms. Heck, you might have some strange valve body problem (sticking valve/small leak letting air into the valve body when off etc.)
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I had a stuck valve in it when it was first rebuilt and they fixed it under warranty, when I put it into drive or revers first thing in the morning, it would act like you were slowly releasing the clutch on a manual- you would step on the gas, the revs would rise, then fall slowly as the transmission engaged more and more. I thought it was slipping,so I took it back to them, they took apart the valve body, said there was some debris in it, cleaned it out and it worked great from there on out.
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