Not sure if anyone can help me with this but it's worth a shot. I've been experiencing some issues with my geartronic gearbox and the first port of call is to flush the ATF which fixes 90% of problems. I've done this, and some things are better, but 1 issue remains.
I will do my best to explain the problem and apologies for the length of my post.
Whenever I de-accelerate, be it braking or removing my foot from the accelerator, when the revs move down to around 2,000RPM, it then drops down to idle RPM (just below 1,000RPM). Then, when I press the accelerator down to speed up the rev needle will move up until until I feel a clunk and I then start picking up speed. This issue only seems to occur when done in the same gear. Let me explain.
If I'm travelling in 5th gear and de-accelerate and the revs drop down to idle as above, then I accelerate again, if the gear is 5th again then it clunks in. However, if I slow down enough that it uses 4th when I accelerator again, it comes in smoothly.
To test this I switched to geartronic mode. Travelling at approximately 3,000RPM in 5th gear I begin to slow. At 2,000RPM the revs drop down to idle. If I accelerate again (and the gear selected is the same) it will clunk in. This occurs in all gears.
Test 2 - Travelling at approximately 3,000RPM in 5th gear I begin to slow. At 2,000RPM the revs drop down to idle. I select 4th, then 5th again, and accelerate, no clunking.
Test 3 - Travelling at approximately 3,000RPM in 5th gear I begin to slow. At 2,000RPM the revs drop down to idle. I select 4th and accelerate, no clunking.
So as you can see, it only occurs in the same gear. Test 2 is interesting, as all I'm doing is selecting 4th and 5th again, electronically, I never accelerate in between selecting.
Now I'm not sure if these are 2 separate issues or not. When de-accelerating, are the revs supposed to drop down to idle around at 2,000RPM? What is causing this issue? Any questions let me know. Thanks.
Note - I have the latest gearbox software update.
Matt
I will do my best to explain the problem and apologies for the length of my post.
Whenever I de-accelerate, be it braking or removing my foot from the accelerator, when the revs move down to around 2,000RPM, it then drops down to idle RPM (just below 1,000RPM). Then, when I press the accelerator down to speed up the rev needle will move up until until I feel a clunk and I then start picking up speed. This issue only seems to occur when done in the same gear. Let me explain.
If I'm travelling in 5th gear and de-accelerate and the revs drop down to idle as above, then I accelerate again, if the gear is 5th again then it clunks in. However, if I slow down enough that it uses 4th when I accelerator again, it comes in smoothly.
To test this I switched to geartronic mode. Travelling at approximately 3,000RPM in 5th gear I begin to slow. At 2,000RPM the revs drop down to idle. If I accelerate again (and the gear selected is the same) it will clunk in. This occurs in all gears.
Test 2 - Travelling at approximately 3,000RPM in 5th gear I begin to slow. At 2,000RPM the revs drop down to idle. I select 4th, then 5th again, and accelerate, no clunking.
Test 3 - Travelling at approximately 3,000RPM in 5th gear I begin to slow. At 2,000RPM the revs drop down to idle. I select 4th and accelerate, no clunking.
So as you can see, it only occurs in the same gear. Test 2 is interesting, as all I'm doing is selecting 4th and 5th again, electronically, I never accelerate in between selecting.
Now I'm not sure if these are 2 separate issues or not. When de-accelerating, are the revs supposed to drop down to idle around at 2,000RPM? What is causing this issue? Any questions let me know. Thanks.
Note - I have the latest gearbox software update.
Matt
