Trans shifting trouble...
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Trans shifting trouble...
my mom is having trouble with the trans acting like it doesn't know when to shift. you get to about 50 moh and it starts shifting back and forth between gears rapidly. you speed up or slow down and its fine, but if you hold it there it will just keep going nuts. My dad thinks that its something to do with the computer telling it when to shift. does this sound right? anyone else go through this? Thanks...
RIP
True Car Nut
Joined: Jul 2004
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From: Grand Rapids, Mi
Does it do it regardless of the engine temperature, or just when cold, or just warm? Do the RPMs change, or is it something that is felt instead? The torque converter lockup should occur right around that speed - 46 MPH, IIRC
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if i remember right here it does it reguardles of the temp... not sure about the RPMs but it is felt inside. mom said it feels like someone is shaking the car... i'll also check on the milage and year when i get home too... like i said, Its mom'* bonneville so i'm not 100% sure on the details... thanks again.
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Joined: Feb 2016
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4T65E Shift Issues
I have a 2005 Pontiac Aztek with a 4T65E transmission. I was getting high rev'* and hard shifts, both up and down in all gears, and had the maximum adapt and long shift code 1811. I replaced the pressure control solonoid, the 1-2 and 3-4 shift solonoids, the vehicle speed sensor, the fluid filter, and the fluid. This all made a huge improvement in shifting, but I still have one nagging problem!
When the vehicle is started, I generally get a high rev on the first 1-2 shift. After that, the transmission shifts great. If anyone has an experience fixing the high rev on the initial 1-2 shift, I would really appreciate hearing the fix.
Thanks.
When the vehicle is started, I generally get a high rev on the first 1-2 shift. After that, the transmission shifts great. If anyone has an experience fixing the high rev on the initial 1-2 shift, I would really appreciate hearing the fix.
Thanks.
Junior Member
Joined: Apr 2015
Posts: 9
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I have a 2005 Pontiac Aztek with a 4T65E transmission. I was getting high rev'* and hard shifts, both up and down in all gears, and had the maximum adapt and long shift code 1811. I replaced the pressure control solonoid, the 1-2 and 3-4 shift solonoids, the vehicle speed sensor, the fluid filter, and the fluid. This all made a huge improvement in shifting, but I still have one nagging problem!
When the vehicle is started, I generally get a high rev on the first 1-2 shift. After that, the transmission shifts great. If anyone has an experience fixing the high rev on the initial 1-2 shift, I would really appreciate hearing the fix.
Thanks.
When the vehicle is started, I generally get a high rev on the first 1-2 shift. After that, the transmission shifts great. If anyone has an experience fixing the high rev on the initial 1-2 shift, I would really appreciate hearing the fix.
Thanks.
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victahmone
Bonneville GXP/ Northstar Powered Cars
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Nov 11, 2010 10:54 PM