Why is my trans slipping ONLY when warmed up?

5

Asked by May 10, 2017 at 06:21 PM about the 2003 Chevrolet Impala Base

Question type: Maintenance & Repair

When 4T65E trans is cold-all gears lock in, and shifts correctly.
Easily spins wheels on sand roads.

After warm up and at op temp, all gears slip badly.
Kill engine, sit for 5 mins, then restart car- trans works OK for very short distance, then slips again.
Then drive down steep hill to 50-60 mph, am able to maintain speed for several miles, even over medium hills- if I don't stop.

Changed fluid and filter-problem remains.
Poorly maintained, fluid was dark brown/black, but did not taste or smell burnt.
Silt/dust in pan, but no chunks of anything nor aluminum shavings.

Replaced TCC solenoid-problem remains.

Have a code-P0757(shift solenoid B) but do not understand how that is effecting all gears only when warm.

Car shows over 211,200 miles, but do not know it's history.

Thank you for your advice.

5 Answers

251,095

At 211K, it's probably time for a rebuild. Be glad that it got this far. Poorly maintained is not a good sign. Have a local transmission shop diagnose the issue.

5

Thanks for the reply Tom, but that does not explain why it slips ONLY after it's warmed up, why it works OK for a short distance after shutting down for 5 mins, and why I can maintain hiway speeds with momentum. Please read the symptoms in my original post. If I could travel the 80 miles one way down the mountain -and then back up again-), I would gladly have them tell me if its an electronic control outside the trans, or if it's a mechanical problem. I've got a known good trans(parts car), but why swap them out if it's just an electronical problem that would still remain afterwards?

74,495

Cold fluid will run at a higher pressure than hot fluid. That your fluid was dark brown or black indicates that the transmission has probably been running too hot. After the rebuild install a larger transmission cooler and a ATF temperature gauge.

5

Good info F_O_R, thanks. Do you think the fluid and trans would cool down in just 5 mins, temporarily restoring operation? I'll check the temps next test-drive to be sure. I'm worried there might be a temperature related electronic device or signal to-or-from the pcm, causing a pressure problem. DANG ELECTRONICS! My Son wants to just swap out the trans without further research or troubleshooting....the boundless exuberance of reckless youth, or the caution of wasted labor experiences and age, right?

5

I'm thinking "limp mode."

Your Answer

Impala

Looking for a Used Impala in your area?

CarGurus has 34,725 nationwide Impala listings starting at $1,250.

ZIP:

Chevrolet Impala Experts

  • #1
    Js08016
    Reputation
    1,850
  • #2
    Tom Demyan
    Reputation
    1,760
  • #3
    Danny Wang
    Reputation
    1,680
View All

Related Models For Sale

Used Chevrolet Malibu
1,257 Great Deals out of 77,876 listings starting at $1,500
Used Chevrolet Camaro
419 Great Deals out of 31,911 listings starting at $2,395
Used Honda Accord
1,047 Great Deals out of 63,027 listings starting at $999
Used Nissan Maxima
324 Great Deals out of 23,728 listings starting at $1,550
Used Ford Mustang
771 Great Deals out of 42,663 listings starting at $1,300
Used Nissan Altima
1,118 Great Deals out of 74,981 listings starting at $999
Used Toyota Camry
1,101 Great Deals out of 72,561 listings starting at $1,000
Used Chevrolet Tahoe
642 Great Deals out of 36,956 listings starting at $1,800
Used Chevrolet Silverado 1500
2,132 Great Deals out of 183,036 listings starting at $1,898
Used Chevrolet Monte Carlo
14 Great Deals out of 1,353 listings starting at $995

Used Cars For Sale

2018 Chevrolet Impala For Sale
5,618 listings starting at $23,206
2017 Chevrolet Impala For Sale
80 Great Deals out of 10,384 listings starting at $16,000
2016 Chevrolet Impala For Sale
38 Great Deals out of 1,549 listings starting at $13,898
2015 Chevrolet Impala For Sale
25 Great Deals out of 1,360 listings starting at $10,750
2014 Chevrolet Impala For Sale
85 Great Deals out of 2,588 listings starting at $9,700

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.