Nephilim 1st Gear January 4, 2007 Share January 4, 2007 Last night after driving in very heavy rain, my CVT car suddenly jerked when going up the slope of my MSCP. It somehow managed to clear the slope but continued jerking when I stepped on accelerator when on level ground. Feeling is like kenna stuck in a high gear in slow speed. I stopped my car, changed to neutral, then changed back to D and the problem went away. Anyone experienced this before? Could it be something to do with the rain? Now a bit scared when driving at high speed. BTW my car mileage ~25k km. ↡ Advertisement Link to post Share on other sites More sharing options...
Dexlee Clutched January 4, 2007 Share January 4, 2007 which car are your driving? Link to post Share on other sites More sharing options...
Nhrisuzu 1st Gear January 4, 2007 Share January 4, 2007 high gear, low speed = jerking?? or is vibrating badly?? Link to post Share on other sites More sharing options...
Nephilim 1st Gear January 4, 2007 Author Share January 4, 2007 Sorry my description maybe not clear. To elaborate further, feeling is like when driving manual car trying to go up MCSP slope in gear 3 instead of gear 2. Or when you are in gear 3 when your speed is only 10km/h. Vibrating/jerking I can't tell the diff Link to post Share on other sites More sharing options...
Nephilim 1st Gear January 4, 2007 Author Share January 4, 2007 From my avatar, I'm driving a toyota ractis - but not many people can recognise my car model Link to post Share on other sites More sharing options...
Ccssgm 1st Gear January 4, 2007 Share January 4, 2007 I thought 4AT.......Then Hav tis Problem.......When going down / Up slope .... Link to post Share on other sites More sharing options...
Nutty 4th Gear January 4, 2007 Share January 4, 2007 My 4AT when my gear goes up from 2nd to 3rd, there will be a momental pause and slight jerk before going to 3rd gear. I also wonder what's wrong. Link to post Share on other sites More sharing options...
Ccssgm 1st Gear January 4, 2007 Share January 4, 2007 Mine Is Down the Slope........Pull Back ..... Gear change ........Is tis any problem to the gear Box........Advise Please........Get some experience....... My previous Car ...Matrix.... Link to post Share on other sites More sharing options...
Andpercent Neutral Newbie January 4, 2007 Share January 4, 2007 ractis is a rare PI car. Not many on the roads. Best is to send it for checks. Better safe than sorry. Link to post Share on other sites More sharing options...
Runicboy Neutral Newbie January 4, 2007 Share January 4, 2007 Could it be that you engage Overdrive? That what happens to me when I engage overdrive accidently on my 4AT Latio for the first time. Thought something went wrong when all of a sudden RPM shoot up and I cant get the car to move fast. Discover later that engine ram up to give the extra power. Check it out on your manual. Link to post Share on other sites More sharing options...
Nephilim 1st Gear January 4, 2007 Author Share January 4, 2007 (edited) In CVT we have this thing called 'CVT Sport' mode (not sure if similar to AT Overdrive). I drive with this switched on all the time mainly to give me better pickup. Like you said RPM will shoot up when I engage this (maybe to counter CVT lag) but so far I haven't had any prob except for what happened last night Today drive to work also no problem. Not sure if my PI workshop has any experience with CVT also - scared scarly highlight to them they treat my car like AT I just have a wild thought ... maybe, just maybe ... at that moment last night my wet wheels slipped on the wet slope and this caused some sensor to detect wrongly or something ???????? Edited January 4, 2007 by Nephilim Link to post Share on other sites More sharing options...
Dexlee Clutched January 4, 2007 Share January 4, 2007 I think the 'CVT SPORTS MODE' you refering to works like the overdrive in all AT cars. Not advisable to drive your car with this mode ALL THE TIME as it not only give you bad FC but so overkill your gear box. How long have you been drving in this mode? Link to post Share on other sites More sharing options...
Holysniper Neutral Newbie January 4, 2007 Share January 4, 2007 i tot overdrive is to save fuel as it has 1 more final drive gear compared to off? Link to post Share on other sites More sharing options...
Aspri Clutched January 4, 2007 Share January 4, 2007 CVT Sports allows the car to intelligently decide to hold a certain ratio for you to extract more power from the engine at higher RPM (you should note that most normal cars has their max power at some crazy RPM like 6k). Typically, it will shift to a higher gear under normal load. CVT is also fairly common now so I guess if your PI can sell the car to you, they can service it (it's more finicky than normal automatic gears though). Finally, my guess is that your tires lost grip and ABS kicked in during that fateful day. If there's anything to panic about, perhaps it would be your tires' poor wet grip. If you were going upslope and your car is FWD, the weight of the car is towards the rear thereby lifting the car and reducing traction. Makes sense? Link to post Share on other sites More sharing options...
Dexlee Clutched January 4, 2007 Share January 4, 2007 He mention that: Meaning he drive on CVT sports mode aka overdrive off. Link to post Share on other sites More sharing options...
Nephilim 1st Gear January 4, 2007 Author Share January 4, 2007 Oh I didn't know that! My manual did say to switch on CVT Sports for responsiveness and switch it off to improve FC. It did not mention anything about gearbox damage due to prolonged usage. I happened to chance upon some Mini-Cooper forum and some folks there also drive with their CVT Sports on all the time. I have been driving on CVT Sports for 3 months liow! Link to post Share on other sites More sharing options...
Holysniper Neutral Newbie January 4, 2007 Share January 4, 2007 oh.. tink i misread wat you typed.. i tot u mean driving with overdrive on as u didnt type on or off.. Link to post Share on other sites More sharing options...
Dexlee Clutched January 4, 2007 Share January 4, 2007 (edited) CVT sports mode works like overdrive in other AT cars. Most ppl use it only during overtaking for the extra power, if works like downshifting of gears or virtually lock your gear in lower gear to prevent it from upshift. I also drive CVT. Edited January 4, 2007 by Dexlee ↡ Advertisement Link to post Share on other sites More sharing options...
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