2001 Corvette A4 4L60E Acting Funny
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1st Gear
Joined: Mar 2021
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2001 Corvette A4 4L60E Acting Funny
I have a 2001 Base Corvette with the A4 transmission, and in 2nd gear, the revs rise when I step on the accelerator, then fall, more like a float down, then they rise back up, then it shifts to third. The 2-3 shift is really hard. No one I've talked to has any clue what this could be, any ideas?
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How many miles on the car, how many since transmission fluid and filter change? What was the condition of the fluid? Clutch material in the pan?
All sorts of things can cause the symptom- low fluid level, bad filter, deposits caused by deteriorated fluid, worn clutches, bad solenoids or pump. Bad PCM/ deteriorated programming. Failed O ring somewhere,
First thing to do is to check fluid level. There is a specific procedure for this in the Factory Service Manual.
Checking fluid level on a C5 A4 is fairly easy, but there are specific procedures to insure that the fluid level is correct:
Raise the car.
Start the engine and leave it running with the transmission in PARK.
With your foot holding the brakes, cycle the transmission through all the gears, then back to PARK.
With the engine still running and the transmission in PARK, monitor transmission temperature on the DIC. As the transmission temperature rises to 122 F, remove the plug in the transmission fill/ Check level hole. Keep a pan under the hole, fluid may dribble out as the transmission temperature rises.
Correct fluid level is at the bottom of the fill/ check level hole at 122 F.
Do NOT shut the engine down until the plug is back in the fill/ check level hole. If you do, HOT fluid will gush out and the transmission will be low on fluid.
You will need a small hand pump to pump the fluid into the fill/ check level hole if the fluid level is low.
In my view, transmission fluid and filter should be changed every 30,000 miles or sooner if you track the car, and only full synthetic fluid should be put in the transmission. If you do not know when the fluid and filter have been changed- it is time.
All sorts of things can cause the symptom- low fluid level, bad filter, deposits caused by deteriorated fluid, worn clutches, bad solenoids or pump. Bad PCM/ deteriorated programming. Failed O ring somewhere,
First thing to do is to check fluid level. There is a specific procedure for this in the Factory Service Manual.
Checking fluid level on a C5 A4 is fairly easy, but there are specific procedures to insure that the fluid level is correct:
Raise the car.
Start the engine and leave it running with the transmission in PARK.
With your foot holding the brakes, cycle the transmission through all the gears, then back to PARK.
With the engine still running and the transmission in PARK, monitor transmission temperature on the DIC. As the transmission temperature rises to 122 F, remove the plug in the transmission fill/ Check level hole. Keep a pan under the hole, fluid may dribble out as the transmission temperature rises.
Correct fluid level is at the bottom of the fill/ check level hole at 122 F.
Do NOT shut the engine down until the plug is back in the fill/ check level hole. If you do, HOT fluid will gush out and the transmission will be low on fluid.
You will need a small hand pump to pump the fluid into the fill/ check level hole if the fluid level is low.
In my view, transmission fluid and filter should be changed every 30,000 miles or sooner if you track the car, and only full synthetic fluid should be put in the transmission. If you do not know when the fluid and filter have been changed- it is time.
