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Anonymous Posted on Jul 06, 2014
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2004 impala whinnes when drive it and sometimes smells like transmission fluid

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Hammer Time

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  • Chevrolet Master 884 Answers
  • Posted on Mar 20, 2016
Hammer Time
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Have you checked the power steering fluid level?

3 Related Answers

joecoolvette

joecoolvette

  • 5660 Answers
  • Posted on Jul 09, 2009

SOURCE: hard shifting Impala, sometimes.

Sounds like the vacumn modulator isn't connected. Like the hose has come off, or there is a tear in the hose. (4t60-E transmission)

4t65-E transmission is a different ballgame. Check the electrical connector to the side of the tranny. Make sure it's plugged in tight, and there is no corrosion on the connectors. Past this point it's time to check sensors. WSS, (Wheel Speed Sensor), and VSS, (Vehicle Speed Sensor)
Make sure these connections aren't corroded, and are on tight on both transmissions.
(Don't know which one you have. 4t60-E, or 4t65-E. I suspect you have the 4t60-E. It will state this on the transmission oil pan in raised letter/numbers)

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Anonymous

  • 10 Answers
  • Posted on Mar 07, 2010

SOURCE: power steering fluid in '04 chevy impala

i have an impala Ls 3.8 liter and (not sure about the 3.4 liter) but mine is located in the back of the engine near the middle. and get a long thin funnel because its down a little ways.

Molson02536

Harvey N Tawatao

  • 3854 Answers
  • Posted on Apr 18, 2010

SOURCE: i have top of the 2004 impala indy ss.transmission

Soft shifting, gradual performance degradation: Poor line pressure rise due to leaking boost valve, clogged EPC filter screen, failing EPC solenoid, or worst case: leaky seals throughout. Seal restorer may fix last problem. Also try a transmission flush with BG brand products (Firestone stocks it).
Chances are the boost valve may be leaking or a bad EPC valve. (EPC Electronic Pressure Control valve). Try not to drive the transmission to hard as to ensure you do not do any further damage which would cause in the transmission rebuilt.
Replacing the boost valve or EPC valve is easy once the transmission pan is dropped. Put a line pressure gauge (visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure. Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out. If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve.
Thank you for using fixya and good luck.

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You can expect problems with the transmission if you do not have it serviced regularly. Problems can be intensified if you pull a trailer, drive in hot, dusty areas, or do a lot of stop and go driving and do not perform the scheduled maintenance.

Sometimes, low fluid level can be a source of the problem and other times a change of fluid can solve the problem - but not as often as one would hope. Check the fluid level on the dipstick. Add enough fluid to bring it to the correct level. The fluid should be pinkish/red in color, but will likely be darker if it has been in for a long time. Regardless of color, the fluid should not smell burnt. An improperly shifting / slipping transmission coupled with burnt smelling fluid is an indicator of a potential expensive transmission rebuild on the horizon.

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