Transmission is shifting strange
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Marsaydees
Transmission is shifting strange
It only does it between 25-40 mph. Here's how to reproduce it:
Say i'm cruising at a speed ranging from 25-40mph with the engine at about 1500rpm. If I give it throttle, say 30%, the RPMs climb from 1500rpm to 2000rpm where it will abruptly and roughly shift into the next gear down to 1700rpm. The shift is not smooth and jerks the car, annoying. I believe this is the 3rd gear to 4th gear shift.
All of the other shifts are flawless.
Say i'm cruising at a speed ranging from 25-40mph with the engine at about 1500rpm. If I give it throttle, say 30%, the RPMs climb from 1500rpm to 2000rpm where it will abruptly and roughly shift into the next gear down to 1700rpm. The shift is not smooth and jerks the car, annoying. I believe this is the 3rd gear to 4th gear shift.
All of the other shifts are flawless.
Last edited by Dingleberry; Oct 18, 2009 at 01:46 AM.
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02 C32 AMG
what radiator do you have? have you had a glycol contamination test recently? i know there was a shift problem for people but it was at 1500 between 1st and 2nd and i thought it was related to glycol contamination.
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Marsaydees
I did have a test done on the ATF by blackstone labs - they did not find glycol.
the ATF has 60k miles on it, so I will be replacing it with fresh ATF shortly and i'm putting in a behr radiator for prophylaxis
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02 C32 AMG
hmm...do a search about slow or jerky or rough transmission shifts. i remember reading years ago tons of threads about it. maybe those will help out.
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Thread Starter
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From: USA
Marsaydees
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From: Brisbane, Australia
C32 AMG
Mine does the same and I blame it on my driving style and a transmission program that doesn't suit it.
The car seem to hold a gear (A little bit like engine braking) when you go in to a corner and then changes up when you put a little power on. It is not smooth at all.
It's almost like the car expectes you to bury the pedal coming out of every corner and punishes you for not doing it.
The car seem to hold a gear (A little bit like engine braking) when you go in to a corner and then changes up when you put a little power on. It is not smooth at all.
It's almost like the car expectes you to bury the pedal coming out of every corner and punishes you for not doing it.
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From: USA
Marsaydees
Mine does the same and I blame it on my driving style and a transmission program that doesn't suit it.
The car seem to hold a gear (A little bit like engine braking) when you go in to a corner and then changes up when you put a little power on. It is not smooth at all.
It's almost like the car expectes you to bury the pedal coming out of every corner and punishes you for not doing it.
The car seem to hold a gear (A little bit like engine braking) when you go in to a corner and then changes up when you put a little power on. It is not smooth at all.
It's almost like the car expectes you to bury the pedal coming out of every corner and punishes you for not doing it.
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From: USA
Marsaydees
Here's my perception in other automatic cars, such as our Lexus GS430. When cruising at low speed and giving it light throttle 30% (so the car does not have to shift) the RPM's will freely climb from 1500rpm to 2000rpm and the RPMs will stay at 2000 for a couple seconds while the car is accelerating, and then after that acceleration while the RPMs are locked in at 2000 the RPMs will climb proportionally with the speedo. Why does the C32 not do this?
Last edited by Dingleberry; Oct 20, 2009 at 11:53 AM.
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From: Keesler AFB, Gulfport, MS
C32 AMG
Search "tranny jerk" or "1500 rpm jerk" and you will find countless posts about this well known issue.
After a new radiator, rebuilt tranny top to bottom TWICE (warranty) new TCU and god only knows what else, I still have the "jerk" and like many others, have learned to live with it.
The ECU reset trick (also search) has proven to be the most effective way around this, although it's only a temp fix. The issue seems to be with the tq converter and/or the way the adaptive tranny learns, so I'm told by the "pros" anyway.
I didn't read this entire thread since it's been beaten to death, but if I'm just repeating what's already been said, I apologize.
Good luck!
After a new radiator, rebuilt tranny top to bottom TWICE (warranty) new TCU and god only knows what else, I still have the "jerk" and like many others, have learned to live with it.
The ECU reset trick (also search) has proven to be the most effective way around this, although it's only a temp fix. The issue seems to be with the tq converter and/or the way the adaptive tranny learns, so I'm told by the "pros" anyway.
I didn't read this entire thread since it's been beaten to death, but if I'm just repeating what's already been said, I apologize.
Good luck!
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From: Keesler AFB, Gulfport, MS
C32 AMG
PS, your issue most likely isn't 3rd to 4th if you're going that slow. Manually shift the car and see if you can reproduce. Mine is retarded in 1st and 2nd in low rpms, very jerky and the tq converter lockup feels like a shift but it's not. My money is on that.
Do the ECU reset trick (not really an ECU reset but that's what it's become known as) and report back.
Do the ECU reset trick (not really an ECU reset but that's what it's become known as) and report back.
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Joined: Aug 2009
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From: USA
Marsaydees
Search "tranny jerk" or "1500 rpm jerk" and you will find countless posts about this well known issue.
After a new radiator, rebuilt tranny top to bottom TWICE (warranty) new TCU and god only knows what else, I still have the "jerk" and like many others, have learned to live with it.
The ECU reset trick (also search) has proven to be the most effective way around this, although it's only a temp fix. The issue seems to be with the tq converter and/or the way the adaptive tranny learns, so I'm told by the "pros" anyway.
I didn't read this entire thread since it's been beaten to death, but if I'm just repeating what's already been said, I apologize.
Good luck!
After a new radiator, rebuilt tranny top to bottom TWICE (warranty) new TCU and god only knows what else, I still have the "jerk" and like many others, have learned to live with it.
The ECU reset trick (also search) has proven to be the most effective way around this, although it's only a temp fix. The issue seems to be with the tq converter and/or the way the adaptive tranny learns, so I'm told by the "pros" anyway.
I didn't read this entire thread since it's been beaten to death, but if I'm just repeating what's already been said, I apologize.
Good luck!
What I am saying is, if I am cruising at 35mph at 1300rpm and give it 30% throttle, the engine free revs to 2000rpm and the car will abruptly shift harshly into 4th gear (I think) Either that or the car was already in 4th gear and there's something funny with the converter lock-up. Does the converter even lock-up at 35mph under these conditions?
From my previous post, do you know what i'm saying when I say other automatic cars free rev from 1000rpm to 2000rpm and then hold the RPM at 2000 while accelerating without shifting?
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From: Keesler AFB, Gulfport, MS
C32 AMG
But I do not have the 1500rpm jerk... If I cruise away extremely slowly, the car shifts flawlessly at 1500rpm, at any RPM, as long as their is a constant steady acceleration.
What I am saying is, if I am cruising at 35mph at 1300rpm and give it 30% throttle, the engine free revs to 2000rpm and the car will abruptly shift harshly into 4th gear (I think) Either that or the car was already in 4th gear and there's something funny with the converter lock-up. Does the converter even lock-up at 35mph under these conditions?
From my previous post, do you know what i'm saying when I say other automatic cars free rev from 1000rpm to 2000rpm and then hold the RPM at 2000 while accelerating without shifting?
What I am saying is, if I am cruising at 35mph at 1300rpm and give it 30% throttle, the engine free revs to 2000rpm and the car will abruptly shift harshly into 4th gear (I think) Either that or the car was already in 4th gear and there's something funny with the converter lock-up. Does the converter even lock-up at 35mph under these conditions?
From my previous post, do you know what i'm saying when I say other automatic cars free rev from 1000rpm to 2000rpm and then hold the RPM at 2000 while accelerating without shifting?
It only does it between 25-40 mph. Here's how to reproduce it:
Say i'm cruising at a speed ranging from 25-40mph with the engine at about 1500rpm. If I give it throttle, say 30%, the RPMs climb from 1500rpm to 2000rpm where it will abruptly and roughly shift into the next gear down to 1700rpm.
All of the other shifts are flawless.
Say i'm cruising at a speed ranging from 25-40mph with the engine at about 1500rpm. If I give it throttle, say 30%, the RPMs climb from 1500rpm to 2000rpm where it will abruptly and roughly shift into the next gear down to 1700rpm.
All of the other shifts are flawless.
Last edited by SilverBulletAMG; Oct 20, 2009 at 04:43 PM.
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From: Keesler AFB, Gulfport, MS
C32 AMG
Good deal.
If it's like mine, you'll end up having to do this every month or two. Oddly enough, I get better mileage around town when it's jerky (3-4 mpg worth) vs. after adaptations are cleared. Car should feel a bit peppier now as well, right?
If it's like mine, you'll end up having to do this every month or two. Oddly enough, I get better mileage around town when it's jerky (3-4 mpg worth) vs. after adaptations are cleared. Car should feel a bit peppier now as well, right?
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From: Keesler AFB, Gulfport, MS
C32 AMG
Start a new thread at the very least or head to the OT forum.Side note: I will definitely be getting this game as soon as it hits the shelves.
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From: Bay Area SF
Silver 2002 C32, Silver 2006 CLK 350
I had the 1500 rpm jerk and lived with it ever since I got the car, I also had the Valeo radiator. the jerk comes and goes once in a while, I feel it more when its warm outside like 85 and up.
Well last weekend I got me a new Behr Radiator and tranny filter and oil. got a real good deal on parts from an online website...
I took my time and made sure I cleaned and inspected everything.
my Car is done now and WoW the car shift so smooth even when it was warm.
thanks to everyone in here I saved myself about $1700 bucks
Well last weekend I got me a new Behr Radiator and tranny filter and oil. got a real good deal on parts from an online website...
I took my time and made sure I cleaned and inspected everything.
my Car is done now and WoW the car shift so smooth even when it was warm.
thanks to everyone in here I saved myself about $1700 bucks
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From: DC Metro
02 C32 AMG, 06 C230 Sport (Gone)
I have just recently noticed I am having a jerk when I do apply light throttle on the 1 to 2 shift at low rpm... Its really starting to get on my nerves. I am just around 54 k maybe its time I flush the tranny fluid?
