1999 Chevrolet Venture transmission problem.
When I put the transmission it into Reverse it drives normally, but when I shift it into Drive and I press on the accelerator, the engine idles faster but the car has a harder time driving and starts moving slowly and then picks up speed. While I keep my foot on the gas and I switch from Drive to 3, I feel slightly more power, and when I move the selector gear from 3 to 2 or 1, the car starts moving more quicker and easier from a stop. I get the most power when it is set on 1. When it is in Drive it has the most hardest time picking up from a stop. It's as if the transmission is slipping. But why do I get more power when I put it in 1 and why does the transmission work almost perfectly
normally in Reverse?
SF: By what you are describing, it sounds as if when you put the shifter in drive range (D) the trans is stating out in 2nd or 3rd gear. This is a default when a problem occurs, usually in the transmission. Would need to get the computer scanned for trouble codes. You may have a shorted shift solenoid A or B. If so, replacement of both recommended. The solenoids are in the side cover of the trans. This requires lowering the frame.
With the amount of miles on the van, there may debre inside which has caused a shift solenoid to fail because the transmission is worn internally and time for an overhaul.
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. 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.
2001 Chevy Venture. Question: Van start fine, but when I put it in drive and push the gas the van just sits there. I wait for about 3min with car on in park and try it again and it goes. Hope transmission is not slipping
Unfortunately it does sounds like the transmission is slipping. Hitting the gas, and the engine is revving up, but van not moving means there is a problem in the transmission. You may want to try a filter and fluid change along with adding a cleaner first. Then put in an additive. Sometimes this will help free up a sticking valve, which may be your problem. When the pan is down to change the filter, the mechanic will look in the bottom of it to see if there is a lot of debre. If there is, then it may be time for an overhaul.
Chevy Venture Transmission Shifting Problems