Irresistance
Senior Member
- Joined
- Apr 25, 2009
- Messages
- 786
- Reaction score
- 6
- Location
- Gdansk, Poland
- Your Mercedes
- 2004 W220 320CDI
Hello,
Okay I browsed around a bit on this forum for the word "jerky" but none of the post seem to cover the issue I am having so here goes...
Since about 2 weeks I am noticing that the car needs just that half second more to change gears. Not always though... sometimes. Also, my TC vibration has come back - not as bad as before the TC recon, but noticeably more present.
The ATF was changed 25K miles ago (with said TC recon, so fully, not just the usual 60%).
One issue that may have something to do with it... in June this month due to a misadventure with a pile of dirt I managed to gently damage my Intercooler. When I say gently I really mean just that - it's in a veeery slight banana-shape where the center might be 5-6mm higher than the sides. The car has worked fine after the incident and generally I dont think it is leaking, although my mechanic did tell me it is probably a good idea to get a new one in a few months time, as these things supposedly are very delicate.
Now - could it be that a change in turbo pressure is causing a mis-match with engine/gearbox and that this slight delay is because if the turbo not running at correct specification? Coz as I said - it's noticeable but slight, worse when cold although can also happen when warm. It's as if the car needs half a second more to shift gear, engage it, and keep going.
Finally - is it possible that this kind of problem is caused by a "sluggish" Torque Converter...? What does the TC do when you change gears... I imagine it momentarily dis-engages/opens yes? RPM does not go up noticeably during gear changes tho... admittedly I haven't really paid attention to this but nothing seems to be out of the ordinary there. Am planning an ATF change soon when I will be adding my Tranny Fixx miracle cure but if the TC is causing this I may wanna claim warranty on the guys that did the recon first...
Many thanks
Okay I browsed around a bit on this forum for the word "jerky" but none of the post seem to cover the issue I am having so here goes...
Since about 2 weeks I am noticing that the car needs just that half second more to change gears. Not always though... sometimes. Also, my TC vibration has come back - not as bad as before the TC recon, but noticeably more present.
The ATF was changed 25K miles ago (with said TC recon, so fully, not just the usual 60%).
One issue that may have something to do with it... in June this month due to a misadventure with a pile of dirt I managed to gently damage my Intercooler. When I say gently I really mean just that - it's in a veeery slight banana-shape where the center might be 5-6mm higher than the sides. The car has worked fine after the incident and generally I dont think it is leaking, although my mechanic did tell me it is probably a good idea to get a new one in a few months time, as these things supposedly are very delicate.
Now - could it be that a change in turbo pressure is causing a mis-match with engine/gearbox and that this slight delay is because if the turbo not running at correct specification? Coz as I said - it's noticeable but slight, worse when cold although can also happen when warm. It's as if the car needs half a second more to shift gear, engage it, and keep going.
Finally - is it possible that this kind of problem is caused by a "sluggish" Torque Converter...? What does the TC do when you change gears... I imagine it momentarily dis-engages/opens yes? RPM does not go up noticeably during gear changes tho... admittedly I haven't really paid attention to this but nothing seems to be out of the ordinary there. Am planning an ATF change soon when I will be adding my Tranny Fixx miracle cure but if the TC is causing this I may wanna claim warranty on the guys that did the recon first...
Many thanks
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