E63S Remap Giving Gearchange "Shunt"
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Junior Member
Joined: Feb 2009
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From: Birmingham England
E63 S Wagon 2014
E63S Remap Giving Gearchange "Shunt"
Hello guys - I've just had a remap on my M157, now giving 700hp and 800ft/lbs torque.
Problem is, under full load (giving it the beans) I get a significant "shunt" at the point of gear change - you can really feel the car thud, seemingly from the rear.
It didn't do it previously - it's as if the box or LSD isn't happy with the power.
Any ideas please?
Problem is, under full load (giving it the beans) I get a significant "shunt" at the point of gear change - you can really feel the car thud, seemingly from the rear.
It didn't do it previously - it's as if the box or LSD isn't happy with the power.
Any ideas please?
Out Of Control!!
Joined: Jun 2004
Posts: 13,799
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Hello guys - I've just had a remap on my M157, now giving 700hp and 800ft/lbs torque.
Problem is, under full load (giving it the beans) I get a significant "shunt" at the point of gear change - you can really feel the car thud, seemingly from the rear.
It didn't do it previously - it's as if the box or LSD isn't happy with the power.
Any ideas please?
Problem is, under full load (giving it the beans) I get a significant "shunt" at the point of gear change - you can really feel the car thud, seemingly from the rear.
It didn't do it previously - it's as if the box or LSD isn't happy with the power.
Any ideas please?
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From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
its normal if you are saying you get a really hard shift, almost like a crack/clunk sound.... when i first got mine tuned i thought i broke the tranny input shaft on the first WOT 1-2 shift.... over a year later tranny is still fine 
Out Of Control!!
Joined: Jun 2004
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
Thread Starter
Junior Member
Joined: Feb 2009
Posts: 25
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From: Birmingham England
E63 S Wagon 2014
Light load changes are fine - mine was also 2nd to 3rd, but I haven't been able to find a piece of road yet to see if it's in other gears.
I generally drive in S+ but again haven't assessed the change in C,S or M.
It's been suggested the box will adapt to the new power so I'll see what the weekend brings and report back.
Thanks
I generally drive in S+ but again haven't assessed the change in C,S or M.
It's been suggested the box will adapt to the new power so I'll see what the weekend brings and report back.
Thanks
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MBWorld Fanatic!
Joined: Feb 2011
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From: miami / delray beach
2014 E63s amg 4matic, 2009 C63, 2006 E55 AMG , 2001.5 AUDI S4 stg 3+ w/meth
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Thread Starter
Junior Member
Joined: Feb 2009
Posts: 25
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From: Birmingham England
E63 S Wagon 2014
Had a decent road test now.
Definitely only S+ and 2nd to 3rd WOT change - though it's a significant shunt, I'm in discussion with the tuner and will report back.
Definitely only S+ and 2nd to 3rd WOT change - though it's a significant shunt, I'm in discussion with the tuner and will report back.
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E63
Out Of Control!!
Joined: Jun 2004
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
MBWorld Fanatic!
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E63
I remember reading somewhere where it was stated by a tuner than MB briefly, cuts boost right before a shift to make the shift appear (feel) faster and more aggressive in some years (newer models of the E63). I noticed a more pronounced "shunt" after the latest software update (which I didn't ask for, but that's another debate).
Out Of Control!!
Joined: Jun 2004
Posts: 13,799
Likes: 3,228
2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
I remember reading somewhere where it was stated by a tuner than MB briefly, cuts boost right before a shift to make the shift appear (feel) faster and more aggressive in some years (newer models of the E63). I noticed a more pronounced "shunt" after the latest software update (which I didn't ask for, but that's another debate).
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E63
It was dialed out by AMS for that particular customer. He did not get the advertised power from the mail tune. Took his car to the shop and it was dyno tuned to get the advertised power level. Also had the shunt tuned out which resulted in smoother shifting under WOT
Out Of Control!!
Joined: Jun 2004
Posts: 13,799
Likes: 3,228
2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
nice
