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Transmission Fluid Disappearing

 
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intelinside
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PostPosted: Wed May 02, 2012 3:55 pm    Post subject:  Transmission Fluid Disappearing Reply with quote

Hey guys, in need of some help.

Symptoms:

-Slipping on acceleration (not consistent with fluid temps, driving time, or acceleration speed)
-Rough Shifting (not consistent with anything again, but happens more when fluid temps are hotter)
-Jerking after letting off the gas pedal (once again, not consistent with anything)

So, last week I drained the tranmission, changed the filter and gasket -replaced with synthetic transmission fluid. There wasn't any metal shavings or gunk, the only thing was a dark film on the tranny pan.

It shifted EXCELLENT for 4 days, then wen't back to being shoddy again. The fluid level was checked multiple times throughout the first few days and didn't change. After 4 days, the fluid level was correct but it started shifting s**t again. After putting 200ish highway miles on it, I added about .5 quarts of fluid. Shifted better for another couple hundred miles, then I had to add 1.5 quarts of fluid.

My question is, where is all the transmission fluid going? There are zero obvious leaks.

I'm looking to drain the fluid again, and flush the torque converter. Since I just changed the fluid, can I skip removing the pan and just flush the converter out?? I was also thinking about installing an aftermarket tranny cooler.

Thanks for the help.
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ZSPOT
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PostPosted: Wed May 02, 2012 4:46 pm    Post subject:   Reply with quote

Sound more like a solenoid problem than a hard part problem. If your confident enough, I would drop the pan, and change out your pressure control solenoid and your TCC solenoid. Also, I would recommend against the full synthetic fluid. It's been my experience that for some of the older, more worn transmissions, the full synthetics are too slippery of a fluid and can actually cause some extra slippage.

Not sure on the fluid loss though. You checked it when warm, after driving, and in neutral each time?

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intelinside
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PostPosted: Wed May 02, 2012 5:51 pm    Post subject:   Reply with quote

Thanks for the input - It's not the first time I've heard about solenoids so I'll be replacing those in the next few days.

And good call on the trans fluid - I'll switch over to non synth
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billy101
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PostPosted: Wed May 02, 2012 10:34 pm    Post subject:   Reply with quote

I would highly recommend an external cooler. I have one on my 2002 Impala LS 3.8 and my transmission temperatures through town never go over 150*F Smile On the interstate I'm lucky to see it hit 170*. It's been high 90's this past week and it has been doing great never going over around 155* in town. definitely a great thing to add, cool fluid will save these transmissions in the long run.

If you do drain all the fluid again, I would go with strictly DEX III, I used Valvoline MaxLife DEXRON III, you can get it at Autozone, and throw a bottle of Lubegard Red in. It has been found to help a lot in higher mileage transmissions.

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2002 Impala LS 3.8 -121,749 miles 11/13/2011
2001 Impala LS 3.8 - 118,510 miles. 9/2/2011. RIP - 11/12/2011
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intelinside
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PostPosted: Thu May 03, 2012 10:23 am    Post subject:   Reply with quote

I was thinking about an external cooler, inexpensive and not difficult to install. I have been using Maxlife dex 3 for the past 30k miles, but not Lubegaurd.

I'm looking to do the solenoids, but my Haynes manual doesn't mention them. Will a chilton manual help me? I just need to know the location of the Pressure Control Solenoid and the TCC Solenoid, Which one is accessible through the transmission pan?

Thanks!
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billy101
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PostPosted: Thu May 03, 2012 2:05 pm    Post subject:   Reply with quote

intelinside wrote:
I was thinking about an external cooler, inexpensive and not difficult to install. I have been using Maxlife dex 3 for the past 30k miles, but not Lubegaurd.

I'm looking to do the solenoids, but my Haynes manual doesn't mention them. Will a chilton manual help me? I just need to know the location of the Pressure Control Solenoid and the TCC Solenoid, Which one is accessible through the transmission pan?

Thanks!


None are accessible through the pan. They're all under the side cover as that's where the valve body is. If you give me the year and motor of your car I can get you all the diagrams off AllDataPro

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2002 Impala LS 3.8 -121,749 miles 11/13/2011
2001 Impala LS 3.8 - 118,510 miles. 9/2/2011. RIP - 11/12/2011
2010 Malibu LTZ 3.6 - 16,014miles. 8/20/2011.
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PostPosted: Thu May 03, 2012 5:37 pm    Post subject:   Reply with quote

Not trying to jack a thread but how much did your tranny cooler cost? Was thinking about it since I'm now on my third tranny.
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intelinside
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PostPosted: Fri May 04, 2012 11:31 am    Post subject:   Reply with quote

billy101 wrote:


None are accessible through the pan. They're all under the side cover as that's where the valve body is. If you give me the year and motor of your car I can get you all the diagrams off AllDataPro


It's a 2003 3.4

Thanks for the help man.
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SuperImpala00
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PostPosted: Fri May 04, 2012 2:22 pm    Post subject:   Reply with quote

billy101 wrote:
I would highly recommend an external cooler. I have one on my 2002 Impala LS 3.8 and my transmission temperatures through town never go over 150*F Smile On the interstate I'm lucky to see it hit 170*. It's been high 90's this past week and it has been doing great never going over around 155* in town. definitely a great thing to add, cool fluid will save these transmissions in the long run.

If you do drain all the fluid again, I would go with strictly DEX III, I used Valvoline MaxLife DEXRON III, you can get it at Autozone, and throw a bottle of Lubegard Red in. It has been found to help a lot in higher mileage transmissions.


not to hijack the thread but I've heard of Lubegard. Is it any good? would it be good to put it in my transmission with the PCS symptoms? got 266,000 miles on the beast, original
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PostPosted: Fri May 04, 2012 6:13 pm    Post subject:   Reply with quote

SuperImpala00 wrote:
billy101 wrote:
I would highly recommend an external cooler. I have one on my 2002 Impala LS 3.8 and my transmission temperatures through town never go over 150*F Smile On the interstate I'm lucky to see it hit 170*. It's been high 90's this past week and it has been doing great never going over around 155* in town. definitely a great thing to add, cool fluid will save these transmissions in the long run.

If you do drain all the fluid again, I would go with strictly DEX III, I used Valvoline MaxLife DEXRON III, you can get it at Autozone, and throw a bottle of Lubegard Red in. It has been found to help a lot in higher mileage transmissions.


not to hijack the thread but I've heard of Lubegard. Is it any good? would it be good to put it in my transmission with the PCS symptoms? got 266,000 miles on the beast, original


Lucky!! Cool

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SuperImpala00
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PostPosted: Sat May 05, 2012 1:59 am    Post subject:   Reply with quote

PushrodPower wrote:
SuperImpala00 wrote:
billy101 wrote:
I would highly recommend an external cooler. I have one on my 2002 Impala LS 3.8 and my transmission temperatures through town never go over 150*F Smile On the interstate I'm lucky to see it hit 170*. It's been high 90's this past week and it has been doing great never going over around 155* in town. definitely a great thing to add, cool fluid will save these transmissions in the long run.

If you do drain all the fluid again, I would go with strictly DEX III, I used Valvoline MaxLife DEXRON III, you can get it at Autozone, and throw a bottle of Lubegard Red in. It has been found to help a lot in higher mileage transmissions.


not to hijack the thread but I've heard of Lubegard. Is it any good? would it be good to put it in my transmission with the PCS symptoms? got 266,000 miles on the beast, original


Lucky!! Cool


haha you have no idea, been driving it with the PCS acting up every now and again for awhile, as long as I don't get on it she shifts fine. Hence my hesitation with changing the fluid/filter and adding Lubegard to see if it helps keep it stable for a bit longer.
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