1999 Chevy Venture LS 3.4Liter Service Engine Soon.
GM Computer codes = Knock Sensor low input.
Replaced head gasket, valve job. Transmission fluid/filter change, fuel pump,
spark plugs, coil packs, water pump.
Question = When the engine in my van is cold (outside air temp doesn't seem to
affect it just engine temp), the transmission slips and then slams into 1st gear if I
don't let the engine warm up. If I let the engine warm up it shifts fine. I had the
fluid and filter changed because of dark/burnt fluid after overheating of the
engine due to a faulty head gasket. 2 days after having the fluid changed, the
transmission has begun to whine. It whines when accelerating, and as the engine
speeds up the whine becomes more intense. I have checked the fluid and it
looks more reddish than before, but still somewhat dark. When the filter was
being changed I saw that there were some small metal hairs on the magnet, but
not very many. The transmission is shifting fine while driving and I still have all
the gears, but I am afraid that the whine means it is on it's way out. Could it be
that it just needs a fluid flush instead of a rebuild? I have just spent a lot of
money on the engine repair! Why does my venture van do this.
Cannot afford a complete transmission rebuild if it isn't absolutely necessary. I
appreciate any input you may have.
SF:
A few possibilities for your trans problems. The shifting problem may be caused
by a valve hanging up in the valve body.A whine noise that intensifies with the
engine revving when in neutral or park only, and goes away when put in gear is
caused by what is called a "Drive sprocket support bearing". If noise is there
when driving, possibly the torque converter is noise, or there is air in the fluid.
This can be caused by possibly the filter seal is missing or not properly installed
after fluid and filter replacement. I would check that seal, and then do a flush. A
filter change or removes about 5-6 quarts of fluid.
GM Computer codes = Knock Sensor low input.
Replaced head gasket, valve job. Transmission fluid/filter change, fuel pump,
spark plugs, coil packs, water pump.
Question = When the engine in my van is cold (outside air temp doesn't seem to
affect it just engine temp), the transmission slips and then slams into 1st gear if I
don't let the engine warm up. If I let the engine warm up it shifts fine. I had the
fluid and filter changed because of dark/burnt fluid after overheating of the
engine due to a faulty head gasket. 2 days after having the fluid changed, the
transmission has begun to whine. It whines when accelerating, and as the engine
speeds up the whine becomes more intense. I have checked the fluid and it
looks more reddish than before, but still somewhat dark. When the filter was
being changed I saw that there were some small metal hairs on the magnet, but
not very many. The transmission is shifting fine while driving and I still have all
the gears, but I am afraid that the whine means it is on it's way out. Could it be
that it just needs a fluid flush instead of a rebuild? I have just spent a lot of
money on the engine repair! Why does my venture van do this.
Cannot afford a complete transmission rebuild if it isn't absolutely necessary. I
appreciate any input you may have.
SF:
A few possibilities for your trans problems. The shifting problem may be caused
by a valve hanging up in the valve body.A whine noise that intensifies with the
engine revving when in neutral or park only, and goes away when put in gear is
caused by what is called a "Drive sprocket support bearing". If noise is there
when driving, possibly the torque converter is noise, or there is air in the fluid.
This can be caused by possibly the filter seal is missing or not properly installed
after fluid and filter replacement. I would check that seal, and then do a flush. A
filter change or removes about 5-6 quarts of fluid.
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