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(#1)
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Hard shifts with Map 1 and above -
03-08-2020, 06:30 PM
I've only had my JB4 for a short time on my 2017 Raptor but I have a problem with the transmission every time I change from Map 0 onward. I start having HARD shifts that almost seem like slipping between gears 1-3 and 6-8. I've jumped between Map 1 and Map 3 and I get the same effect. When I move back to Map 0 the problem goes away. 40K miles and runs on 93 octane regularly.
Have you encountered this problem before or know of a way to fix it? I like the gains I get but the hard shifting I can't handle. Thanks in advance. 
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(#2)
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03-09-2020, 11:03 AM
Are you on update firmware?
Is your OBD2 plugged in correctly? Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s! It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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(#4)
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03-09-2020, 09:28 PM
When you can lets see a log on map1 to see if that sheds any light on the issue.
Home of the JB4 the worlds most popular turbocharged tuning system! It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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(#6)
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03-11-2020, 06:50 PM
oops, Map 1 was too big to be attached. Here's the link for it on my gdrive:
2020-03-10 17_05_25_Map-1.csv - Google Sheets
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(#9)
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SO? Ever get them to reply? -
03-04-2021, 07:16 PM
So how are things?
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(#10)
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03-04-2021, 07:41 PM
Every once in a while I notice a hard shift but it's irregular. Are you in sport mode? That seems to shift more abruptly.
When you post logs, upload the actual log to this site, nobody will click on links due to concerns with those.  Click on our banner to visit our website! Video of our Stage 2 LPFP upgrade installation. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways.
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