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Old 11-21-2005, 10:16 AM   #1
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Default 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...
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Old 11-21-2005, 10:42 AM   #2
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What year is the car in question. Realizing it will be an 00+ also about how many miles?
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Old 11-21-2005, 04:58 PM   #3
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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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Old 11-21-2005, 05:16 PM   #4
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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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Old 02-22-2016, 12:38 PM   #5
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Default 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.
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Old 04-23-2016, 10:22 AM   #6
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Quote:
Originally Posted by Budman551 View Post
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.
I thought I had major transmission issues. Almost replaced those parts replaced all motor mounts. Just about eleminated the shift issues.just need to get the prndl switch replace. Check those mounts.
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