Hi 2008 3.6tdv8 had the trans failsafe come up two weeks ago (code 3rd gear ratio implausible.Also had the problem with slipping out of gear - fixed by replace gear linkage cable pivot. Trying to gain confidence in the car. My question is when driving if i take my foot of the throttle the revs drop to idle like ot is coasting. When u reapply the throttle ot revs to match the speed of the car. The dash stays show d at all times. Is this normal pr ia the gearbox failing. It had a flush and a new torque converter this year.
Silly question gearbox concern.
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Drove in to work this morning in sport mode/ manual mode. didn't throw up any errors. in third in would still drop to idle revs or there abouts if foot was taken of the gas. would change up and down with no problems or thumbing into gear when doing so.
OK been to see the transmission guys at my garage. Rebuilds is all they do and have done for years. They don't seem to concerned to be honest. they say the ATF is fine and there are no debris in the pan. They are reluctant to start stripping until they know more on the problem. I just don't get why the revs could drop to idle when foot is off the accelerator its like leaving a manual gar in gear but pressing down on the clutch and coasting. I will try and get a clip off the speedo and tachometer showing this. Alos the speedo seems about to tke about a second to return to zero when the car has come to a stop. Again is this normal?
Does it only do it in 3rd gear?
When you put it in sport mode and pulled it down a gear or two, did you get any engine braking at all, or was it still like it was in neutral? Seems like the lockup sprag in the torque converter is spinning freely. Doe the torque converter lockup once you get up to speed? Can you feel it engage and see the RPMs drop down about 300 RPM, if you just drive down a level road at a constant speed (say 50 MPH) and keeping for foot on the gas , push down on the brake pedal slightly. You should feel the torque converter unlock and then relock when you take your foot off the brake. Engine RPMs should come up about 300, and then go back down about 300 when the converter unlocks and locks again.
That little rectangular gasket just above the mechatronics unit in the transmission may be torn (they do it all the time) and some of your transmission pump pressure could be bleeding off causing the lockup converter to not fully engage. Its a 10 dollar gasket buried behind 200 bucks of transmission fluid and about an hour or two of labor to drop the mechatronics unit to get at. Just a guess, I hate AT problems.
Speedo's are driven off of the ABS sensors, so that may be just a lag in the IPC display, Its not connected to the transmission at all.
When you put it in sport mode and pulled it down a gear or two, did you get any engine braking at all, or was it still like it was in neutral? Seems like the lockup sprag in the torque converter is spinning freely. Doe the torque converter lockup once you get up to speed? Can you feel it engage and see the RPMs drop down about 300 RPM, if you just drive down a level road at a constant speed (say 50 MPH) and keeping for foot on the gas , push down on the brake pedal slightly. You should feel the torque converter unlock and then relock when you take your foot off the brake. Engine RPMs should come up about 300, and then go back down about 300 when the converter unlocks and locks again.
That little rectangular gasket just above the mechatronics unit in the transmission may be torn (they do it all the time) and some of your transmission pump pressure could be bleeding off causing the lockup converter to not fully engage. Its a 10 dollar gasket buried behind 200 bucks of transmission fluid and about an hour or two of labor to drop the mechatronics unit to get at. Just a guess, I hate AT problems.
Speedo's are driven off of the ABS sensors, so that may be just a lag in the IPC display, Its not connected to the transmission at all.
Hi sorry for the late reply in sport mode I do get engine braking. I have been in touch with a well respected zf gearbox garage. Their response was they can do the drop to idle thing, Its not a problem. Just the clutches disengaging. Drive it and see if the fault reoccurs. So far it hasn't. As i Said it has had a brand new torque convertor this year OEM.Have tried the test you suggested but don't know to be honest. Its such a shame because i LOVE this car - best car I have had and I have had a few. Thinking about trading her in because I need a reliable ride.
Ok so drove it 100 miles or ao no problems with gearbox however got a suspesion error fault for a few minutes. Front right no signal. Cured itself. Have noticed i have a bad rear light bulb connection. Could th8s cause the ecu to have a fit?
OK So I bough another car. the range Rover has been fine since But I don't trust it. Range rover will be sold.
Thats either a failed right front ABS speed sensor (if the ABS lights came on no HDC and can't change the suspension heights), or the height sensor or a bad connection in either sensor. Not a big deal, make sure the ABS sensor is in all the way, and the bolt holding it in is tight, also check and clean the electrical connector. Check the rubber arm connecting the height sensor to the control arm.
Make sure the wires are inserted in all their holders and hasn't rubbed against the tire or suspension components.
Make sure the wires are inserted in all their holders and hasn't rubbed against the tire or suspension components.
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hi I have a issue with revs dropping to idle when I release the accelerator. Other than that it is perfect to drive. This happens in auto and sports. But when I put it in semi auto it drives perfect and the revs react normal.
Is this due to the rectangle gasket being torn as the guy above suggested?
Any advise would be great .
thank you
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