D Mode not upshifting when floored? - BMW M5 Forum and M6 Forums
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post #1 of 8 Old 9th May 2007, 06:47 AM Thread Starter
2ND2NO1
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D Mode not upshifting when floored?

I changed my M Drive today to D-5, DSC off, P500 Sport and came to find out that the car does not upshift if you floor it all the way It shifts fine if the pedal isn't pressed down all the way, but I was hitting the rev limiter every time I floored it. Please let me know if this is normal or should I be calling the dealership...


Thanks

ps. not sure if this will have any effect, but I also have the DINAN diff.
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post #2 of 8 Old 9th May 2007, 07:02 AM
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Quote:
Originally Posted by 2ND2NO1 View Post
... any effect, but I also have the DINAN diff.
It is a known issue with the diff. At some point they will have a software fix.

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Last edited by Falb; 9th May 2007 at 07:03 AM.
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post #3 of 8 Old 9th May 2007, 08:31 AM Thread Starter
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thanks for the reply. i just got the software update and wasn't sure if that had caused anything.

also, good to confirm that the DINAN diff. was actually on the car (bought the car used)

Last edited by 2ND2NO1; 9th May 2007 at 08:41 AM.
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post #4 of 8 Old 9th May 2007, 03:51 PM
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Quote:
Originally Posted by 2ND2NO1 View Post
I changed my M Drive today to D-5, DSC off, P500 Sport and came to find out that the car does not upshift if you floor it all the way It shifts fine if the pedal isn't pressed down all the way, but I was hitting the rev limiter every time I floored it. Please let me know if this is normal or should I be calling the dealership...


Thanks

ps. not sure if this will have any effect, but I also have the DINAN diff.
Well, you certainly have the Dinan 3.91 diff installed ! Its a "side effect" of the Dinan diff. They have been promising a software fix for a while now. Just use Manual mode

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post #5 of 8 Old 9th May 2007, 04:01 PM
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http://www.dinancars.com/Series.asp?...%20Tuning#2417

[SIZE==1]3.91 Limited Slip Differential (SMG and Manual Transmissions)[/SIZE]
Driveline Tuning Part #:
Price: D773-0601A$2999.00Labor Hours: 4.20Special Notes: Sold on an exchange basis; $1800 refundable core deposit. Rear cover must be included with core. BMW specially formulated differential oil #83 22 2 282 583 requried.Point Value: 2

Dinan lowers the stock 3.62 final drive ratio to a 3.91, taking full advantage of torque multiplication for a substantial 8% increase in torque delivered to the road. The improved acceleration comes with only a minor increase in engine speeds at cruise and no effective reduction in top speed potential.

The Dinan 3.91 Limited Slip Differential delivers what is perhaps the greatest "bang for the buck" in terms of improved and more immediate acceleration from the M5.

The differential includes the rear cover, therefore the rear cover must be included with the stock differential when returning for core credit.

Note: With the Dinan 3.91 Differential, the car will not upshift at wide open throttle in the AUTOMATIC mode only. A simple lift on the throttle will allow the car to up-shift. The car will behave normally in every other respect and there is no affect on the Maual mode. Software will soon be available (at additional cost) for the SMG transmission, as with differentials for SMG equipped E46 M3s, that will eliminate this minor inconvenience.

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post #6 of 8 Old 10th May 2007, 01:16 AM
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well i must chime in here, as we all know i've had a couple of 3.91 diff's and this last one actually shift's at redline 1-5 gears.. wierd i know but its true !! i only found out one day when i punched it only to find out i was in d mode and surprisingly enough it shifted..

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post #7 of 8 Old 10th May 2007, 02:27 AM
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Yeah Neil, they probably stuck a stock diff back in on you just to make sure you had one that didn't whine!

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post #8 of 8 Old 12th June 2013, 06:26 PM
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