4th gear studder
Thread Starter
Advanced
Joined: Feb 2021
Posts: 51
Likes: 8
From: Tallahassee, fl
4th gear studder
My 98’ base model automatic studders in 4th gear after reaching cruising when I accelerate. It accelerates perfectly from 1st to 4th, then studders when I give it gas
after cruising. What you guys think it could be? Other than this all is good. No warnings or codes.
after cruising. What you guys think it could be? Other than this all is good. No warnings or codes.
Drifting
Joined: Sep 2009
Posts: 1,862
Likes: 594
From: Prescott, Arizona
Check fluid level.
How long since last fluid nd filter change?
What are the codes?
Changing the fluid and filter on a C5 A4 is fairly easy, but there are specific procedures to insure that the fluid level is correct after the change:
After replacing the filter and bolting the pan back up, fill with new fluid to the drain/ check level plug hole. Then start the engine and leave it running with the transmission in PARK.
Immediately add fluid through the drain/ check level plug hole until fluid flows out of the plug hole. It may take as much as another couple of quarts.
With your foot holding the brakes, cycle the transmission through all the gears, then back to PARK.
Go back underneath and make sure that fluid is still dribbling out of the fill/ check level plug hole. You might have to add some.
With the engine still running and the transmission in PARK, monitor transmission temperature on the DIC. When transmission temperature rises to 122 F, put the plug in the fill/ Check level hole. Keep a pan under the hole, fluid will dribble out as the transmission temperature rises.
Do NOT shut the engine down until the plug is in the fill/ check level hole. If you do, HOT fluid will gush out and the transmission will be low on fluid.
I recommend full synthetic fluid.
Keep in mind that the above procedure drains about half the fluid in the A4. The other half is in the torque converter and other works.
You will need a small hand pump to pump the fluid into the fill/ check level hole.
How long since last fluid nd filter change?
What are the codes?
Changing the fluid and filter on a C5 A4 is fairly easy, but there are specific procedures to insure that the fluid level is correct after the change:
After replacing the filter and bolting the pan back up, fill with new fluid to the drain/ check level plug hole. Then start the engine and leave it running with the transmission in PARK.
Immediately add fluid through the drain/ check level plug hole until fluid flows out of the plug hole. It may take as much as another couple of quarts.
With your foot holding the brakes, cycle the transmission through all the gears, then back to PARK.
Go back underneath and make sure that fluid is still dribbling out of the fill/ check level plug hole. You might have to add some.
With the engine still running and the transmission in PARK, monitor transmission temperature on the DIC. When transmission temperature rises to 122 F, put the plug in the fill/ Check level hole. Keep a pan under the hole, fluid will dribble out as the transmission temperature rises.
Do NOT shut the engine down until the plug is in the fill/ check level hole. If you do, HOT fluid will gush out and the transmission will be low on fluid.
I recommend full synthetic fluid.
Keep in mind that the above procedure drains about half the fluid in the A4. The other half is in the torque converter and other works.
You will need a small hand pump to pump the fluid into the fill/ check level hole.
Melting Slicks
Joined: Jun 2017
Posts: 2,568
Likes: 1,183
From: Conyers Georgia
I had a "shudder" in my C7. It was a known issue with GM. Had a complete tranny flush (not drain and refill) and put in an anti shudder additive from lubeguard and the shudder went away.
