JB4tech.com - International Turbo Tuning Discussion
(#1)
Old
Wrecker 426's Avatar
Wrecker 426 Wrecker 426 is offline
Junior Member
 
Posts: 152
Join Date: Nov 2016
Car: 335xi
Default 335XI possible trans Issue, wont hold 2nd gear - 09-02-2018, 11:01 AM

My car will not hold 2nd gear when doing a boosted launch (if it is that on an auto) using JB4 anti-lag. gets about 15PSI and let it rip in 2nd gear makes about 30mph stutters and decides to shift to 3rd, and then the slow acceleration continues at 25 psi.

Is my trans on its way out?
would the xHP stage 3 be better?

didn't get any logs cause i was filming, fail on my part.

Video of 2 pulls


07' 335xi, VTT Stage 2 Turbos, Meth CM10, Stage 2 LPFP pri, walbro 525 LPFP 2nd, JB4 E85 BEF, VRSF exhaust, Phoenix Race IC, MMP AL inlets, VTT AL Outlet, PR Coils, BMP Intake w/750cc injectors, Manual swapped, SMF Spec Twin disk
Reply With Quote
(#2)
Old
soccerman1bmw soccerman1bmw is offline
Junior Member
 
Posts: 37
Join Date: Aug 2017
Car: 2007 BMW 335i 4D
Default 09-02-2018, 11:41 AM

My mechanic says the valve body’s are what typically need replacing on these transmssions, putting xhp wont fix a mechanic issue
Reply With Quote
(#3)
Old
Wrecker 426's Avatar
Wrecker 426 Wrecker 426 is offline
Junior Member
 
Posts: 152
Join Date: Nov 2016
Car: 335xi
Default 09-02-2018, 12:00 PM

Quote:
Originally Posted by soccerman1bmw
My mechanic says the valve bodyís are what typically need replacing on these transmssions, putting xhp wont fix a mechanic issue
Good to know.

Should also clarify itís only when I do a boosted leave from 0. Other wise it holds fine


07' 335xi, VTT Stage 2 Turbos, Meth CM10, Stage 2 LPFP pri, walbro 525 LPFP 2nd, JB4 E85 BEF, VRSF exhaust, Phoenix Race IC, MMP AL inlets, VTT AL Outlet, PR Coils, BMP Intake w/750cc injectors, Manual swapped, SMF Spec Twin disk
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright © 2007 - 2022, JB4tech.com