G37 Coupe

Deceleration Issues

Old Oct 19, 2008 | 09:56 AM
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Deceleration Issues

Has anyone else noticed that the instance you lift off the gas the car feels like it pulls up and doesn’t coast? Is that a byproduct of the LSD or the tranny slowing the vehicle? I’ve driven rear wheel drive vehicles before and never noticed this type of behavior. Anyone has any ideas?
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Old Oct 19, 2008 | 10:06 AM
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From: 000000N 0000000E
Originally Posted by blackfunk
Has anyone else noticed that the instance you lift off the gas the car feels like it pulls up and doesn’t coast? Is that a byproduct of the LSD or the tranny slowing the vehicle? I’ve driven rear wheel drive vehicles before and never noticed this type of behavior. Anyone has any ideas?

If you have a 6MT and put it in neutral to coast you'll be amazed how long it will roll....
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Old Oct 19, 2008 | 10:29 AM
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What gear are you trying to coast in? The higher the gear the less resistant it will be. Its a G, you shouldn't be coasting anyways!

goodluck
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Old Oct 19, 2008 | 10:37 AM
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Is your car auto or stick? If it is auto, you may need to reflash the ECU. There is a TSB on tranny surg during deceleration.

Last edited by Oggie; Oct 20, 2008 at 08:27 PM.
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Old Oct 19, 2008 | 03:51 PM
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With an stick, that's just what happens if you're in gear (unless you're in a high gear and at a low RPM), put it into manual and you'll coast forever.
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Old Oct 19, 2008 | 04:19 PM
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I noticed this too in my 5AT.... I think its because my last car had a true overdrive gear with very little resistance when you left off the gas.

The G is pretty agressively geared so even in 5th you will feel the resistance of the engine when you let off the gas.
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Old Oct 19, 2008 | 10:03 PM
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Its a 5AT. I've been out trying it today again and if I just lift it feels like the breaks are being applied. Spoke to my mechanic about it and he thinks it could be the torque converter.
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Old Oct 19, 2008 | 11:32 PM
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Interesting, how many miles is on the car? thats strange for it to be acting up so soon.

Goodluck on getting it fixed
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Old Oct 19, 2008 | 11:35 PM
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I had that same thought today...I have 5AT, when I let off the gas it feels as though i'm immediately applying a the break. Is this what the TSB addresses??
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Old Oct 20, 2008 | 08:20 AM
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do you notice your car idling higher than it should? it may be the surge issue covered in a tsb.
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Old Oct 20, 2008 | 09:52 AM
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I have a 5at and do not feel any thing like that, only when its on the sport mode.
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Old Oct 20, 2008 | 11:25 AM
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Originally Posted by fmrlegend
I have a 5at and do not feel any thing like that, only when its on the sport mode.
Yea same here...is that normal?
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Old Oct 20, 2008 | 12:34 PM
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well for sport yea because i think when you let off the gas or come to a stop it downshifts faster, not 100percent sure
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Old Oct 20, 2008 | 01:40 PM
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Originally Posted by lakers8
well for sport yea because i think when you let off the gas or come to a stop it downshifts faster, not 100percent sure
in sport mode, it's trying to replicate downshifting as you would if it was a manual transmission for spirited driving application. it also does that on acceleration as well. but dang, it sure waste a lot of gas......
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Old Nov 5, 2008 | 06:04 PM
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Just wanted to drop a quick update on this. I've narrowed the issues down to the ICC, it seems to be malfunctioning. I.E. it never seems to shut off and it does not seem to work when its on. I have a service appointment scheduled for Friday so i'll know if that was the real issue on Saturday.
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