This had happened twice. Will not shift using the automatic function and when in manual behaves as if there is a rev govener. Only will go up to a rev or speed and then that's it. When I shift up then the same thing happens. After I drive a half hour or so then turn it off it works fine. Has anyone else had this problem?
Replies to This Discussion
-
How many gears does your smart have?
6 and it's a 450 model, not a 451... which has a 5 speed gearbox and was released in the USA in 2008.
The 451 does have a rev limiter that cuts in about 5,500 rpm to prevent over-revving the engine.
The USA model 451 has had a few transmission shifter problems, mostly with shift knob switches.
Are you in Canada?
-
Is your car a G&K smart? Has your car been updated to current software? A lot of the older smart cars have not been updated. Something you can try is to disconect the battery for a couple of minutes. Sometimes this will reset the ECU. Are you getting any lines in the gear shifter display?
Leroy
-
Permalink Reply by Marlene -
I will ask my dealership about the software version and also disconnect the battery. I am getting no lines in the gear shift display when this problem happens. What is a G&K Smart?
When I took the car into the dealership the first time it was happening - they had never heard of this type of problem.
-
Permalink Reply by Ptero Soarus on
-
Send some silicone spray down all the cracks and openings in the shift lever to first eliminate the possibility that the lever linkages are hanging.
-
The 450 cars do not have shift linkage for the transmission. If you spray into the shift linkage it will short it out.
Leroy
-
Thanks for pointing this out Leroy.
There is no mechanical link between the gear shifters (lever or steering wheel paddles) and the transmission. They are all electrical switches that ask (not tell) the contolling computers to please change gear. The interconnections are dependent upon the state of the car (road speed, parked, brake pedal, etc) and the engine state. If it all doesn't add up, the transmission will not shift.
Some silicon sprays will coat the switches in a film that may block conductivity and make matters worse. Years ago, Radio Shack sold a spray lube for the rotary channel changers on TVs. It worked well on cleaning oxidation out of switches and making them work... if you must spray, use that... with caution.
Welcome to
451 smart fortwo
Latest Activity on 451s
Ok, I encountered this problem last March and it's back again. The gear shifting done manually or with automatic mode is very very rough and jerky. The sensation is of driving with a clutch and letting go of the clutch too soon and lurching forwar...
It happend to me this morning and it is not the first time.
I swich shifter from D to Manual and back. It helps.
http://www.smartcarofamerica.com/forums/f84/armrest-december-christmas-special-28038/#post293342
Hi Herb,
The screaming first gear in Auto is the nature of my smart too. I have the pulse with turbo and it just loves to rev with the turbo spun up, then refuses to get out of first without a nudge into manual or take the foot off and wait a few...
id sure like to take a box of my product there!
My Smart gets stuck in first gear when the accelerator is pressed hard, and yes, the trans is in "D". Removing foot from gas pedal has no immediate effect - the car just doesn't upshift for what seems an eternity while the engine just screams. Mos...
smartCar on Facebook/Twitter
