My Park Ave will occasionally (frequency increasing) develop a whining noise
that I am guessing is coming from the transmission. It increases when I
accelerate, or as the cruise control accelerates as in going up grades. When
the car is in this whining mode, there is a very loud clunk as the
transmission shifts gears. If you turn the car off for and then restart,
often the noise is gone and the clunking when shifting is also gone.
Anyone ever experienced similar problems or have an opinion on what my
problem might be?
I've got a 2000 Century that's been doing it for years.
I would have thought GM had fixed it by now.
Section: 07 - Transmission/Transaxle
Bulletin No.: 0O-07-30-002B
Date: July, 2002
Slips, Harsh Upshift or Garage Shifts, Launch Shudders, Flares,
Erratic Shifts and Intermittent Concerns, DTC P1811 or P0748 Set
(Replace Pressure Control Solenoid Valve Assembly)
1997-1999 Buick Riviera
1997-2002 Buick Park Avenue
1998-2002 Buick LeSabre
1999-2002 Buick Regal
2000-2002 Buick Century
2002 Buick Rendezvous
1997-2001 Chevrolet Lumina
1997-2002 Chevrolet Monte Carlo
1999-2002 Chevrolet Venture
2000-2002 Chevrolet Impala
1997-1999 Oldsmobile Eighty Eight
1997-2002 Oldsmobile Silhouette
1998-2002 Oldsmobile Intrigue
2001-2002 Oldsmobile Aurora (3.5L)
1997-2002 Pontiac Bonneville, Grand Prix
1999-2002 Pontiac Transport/Montana
2001-2002 Pontiac Aztek
with Hydra-Matic 4T65-E (RPOs MN3, MN7, M15, M76)
Some owners of the above vehicles with a HydraMatic 4T65-E transaxle
may comment on harsh upshifts or harsh garage shifts, soft shifts,
shudders on hard acceleration, or shifts erratic. These conditions may
appear intermittently or set a DTC P1811 or P0748. During diagnosis, a
low or high line pressure (actual versus desired) may be observed.
The above condition may be due to any one of the following which may
affect line pressure output:
Sediment inside the pressure control (PC) solenoid valve, causing the
PC solenoid valve to mechanically bind.
Sediment in the valve body, causing the torque signal regulator valve
Incorrect transaxle oil level.
Same size - hell there's nothing the same about it at all except the
nameplate. The Park Ave in China is a Holden and bears nothing in common
with the Park Ave that used to cruise the US highways and byways.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.