335i Gearbox 4-5 changes poorly

Dan_V · 03-28-2018, 08:08 AM

Was wondering if anyone can help or has experience with anything similar. My 335i auto box doesnt seem to like changing from gear 4 to 5. if cruising along normally it will shift nicely. But if flat out it will slam into gear very harshly/violently. under some load it kind of hesitates and slips in to gear. Any help on this would be very much appreciated. Thank you

Bamaben · 03-28-2018, 08:30 AM

Quote:

Originally Posted by Dan_V

Was wondering if anyone can help or has experience with anything similar. My 335i auto box doesnt seem to like changing from gear 4 to 5. if cruising along normally it will shift nicely. But if flat out it will slam into gear very harshly/violently. under some load it kind of hesitates and slips in to gear. Any help on this would be very much appreciated. Thank you

See if you can find someone with a scan tool like nt -510 or schwaben that can clear the adaptation for the trans so it can relearn. Just an idea to try. Could be software related or could be a solenoid in the valve body malfunctioning.check the codes. Btw Turner has the schwaben tools on sale now

Dan_V · 03-28-2018, 08:43 AM

Should probably have mentioned i had all the codes read and there were no gearbox codes present. I have also tried the adaption with no success. Also this harsh shifting is present in paddle mode as well as auto mode.

smass · 03-28-2018, 08:59 AM

If you can read the adaption pressures, get a screen shot and send them to ZF. They will assist. I use ISTA+ to get this info. https://www.zf.com/corporate/en_de/m...-inquiries.jsp

Most likely they will recommend new solenoids as that is the most common cause of 6 speed issues.

03-28-2018, 08:08 AM	#1
Dan_V Registered 0 Rep 2 Posts Drives: BMW E92 335i MSport Remapped Join Date: Mar 2018 Location: Somereset iTrader: (0)	335i Gearbox 4-5 changes poorly Was wondering if anyone can help or has experience with anything similar. My 335i auto box doesnt seem to like changing from gear 4 to 5. if cruising along normally it will shift nicely. But if flat out it will slam into gear very harshly/violently. under some load it kind of hesitates and slips in to gear. Any help on this would be very much appreciated. Thank you
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03-28-2018, 08:43 AM	#3
Dan_V Registered 0 Rep 2 Posts Drives: BMW E92 335i MSport Remapped Join Date: Mar 2018 Location: Somereset iTrader: (0)	Should probably have mentioned i had all the codes read and there were no gearbox codes present. I have also tried the adaption with no success. Also this harsh shifting is present in paddle mode as well as auto mode.
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03-28-2018, 08:59 AM	#4
smass Lieutenant Colonel 398 Rep 1,579 Posts Drives: 06 325i - 10 335i Join Date: Sep 2010 Location: Scottsdale, AZ iTrader: (1) Garage List 2010 E90 335i [0.00] 2016 F15 35i [0.00] 2003 E53 3.0 [0.00] 2006 E90 325i [0.00]	If you can read the adaption pressures, get a screen shot and send them to ZF. They will assist. I use ISTA+ to get this info. https://www.zf.com/corporate/en_de/m...-inquiries.jsp Most likely they will recommend new solenoids as that is the most common cause of 6 speed issues.
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