Hi I hope this is the right place to post this. 2002 BMW X5 3.0, GM transmission. November 2001 build. 145,956 original trans. 5 speed automatic.
I changed the fluid at 90K Mobil1, 120K Mobil1 and 144,750K Valvoline Dex6 the recommended fluid. I do a drain, pan drop, and new filter. I repeat the drain and fill 4 times. Each time I fill, I start the car up and gently take the car through the gears as it is up on jack stands and the wheels can spin freely. I let the trans run at idle for 20 minutes after each fill to circulate old and new fluid. I use about 15 qts of fresh fluid to repeat this process.
The last fill: I fill the pan until it runs out the check plug, I start the car, run the car in the gears for a few minutes to let it get to about 130 degrees F, after it reaches operating temp, I put the trans in neutral and leave it running. I open the check plug pump in fluid until it begins to run out. It usually takes an additional 1 qt 26 oz. The pan holds 3.5 qts + 1 qt 26 oz= 5 qts 12 oz
Okay, after the last change 250 miles ago, when cold and while up-shifting I hear a low volume, high pitched whine from the trans area. after a few miles it stops as the trans warms up. Once the trans is warmed up there is no whine, even after cool down and restart a few hours later.
The transmission performs absolutely perfect when cold or hot, like a new tranny. It always feels smoother and shifts more assuredly after a fresh fill.
What could this be? A search on Google yielded some discussion of possible torque converter whine. Is this going to wreck my trans. I am keeping the car until at least 300,000 miles. The whole car looks and performs brand new(of course it has had many repairs along the way, but none to the trans).
.
I changed the fluid at 90K Mobil1, 120K Mobil1 and 144,750K Valvoline Dex6 the recommended fluid. I do a drain, pan drop, and new filter. I repeat the drain and fill 4 times. Each time I fill, I start the car up and gently take the car through the gears as it is up on jack stands and the wheels can spin freely. I let the trans run at idle for 20 minutes after each fill to circulate old and new fluid. I use about 15 qts of fresh fluid to repeat this process.
The last fill: I fill the pan until it runs out the check plug, I start the car, run the car in the gears for a few minutes to let it get to about 130 degrees F, after it reaches operating temp, I put the trans in neutral and leave it running. I open the check plug pump in fluid until it begins to run out. It usually takes an additional 1 qt 26 oz. The pan holds 3.5 qts + 1 qt 26 oz= 5 qts 12 oz
Okay, after the last change 250 miles ago, when cold and while up-shifting I hear a low volume, high pitched whine from the trans area. after a few miles it stops as the trans warms up. Once the trans is warmed up there is no whine, even after cool down and restart a few hours later.
The transmission performs absolutely perfect when cold or hot, like a new tranny. It always feels smoother and shifts more assuredly after a fresh fill.
What could this be? A search on Google yielded some discussion of possible torque converter whine. Is this going to wreck my trans. I am keeping the car until at least 300,000 miles. The whole car looks and performs brand new(of course it has had many repairs along the way, but none to the trans).
.
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