4l80e not shifting into 3rd nor 4th

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72caprice
MS/Extra Newbie
Posts: 2
Joined: Sun Aug 21, 2016 12:16 pm

4l80e not shifting into 3rd nor 4th

Post by 72caprice »

I have a ms3 pro pnp along with the microsquirtv3 controlling an ls2 with a 4l80e transmission. the car will shift to gear 1-2 automatically but not 3-4 only during test mode any ideas on why this could be happening.
Matt Cramer
Super MS/Extra'er
Posts: 17499
Joined: Thu Apr 16, 2009 8:08 pm

Re: 4l80e not shifting into 3rd nor 4th

Post by Matt Cramer »

Check to be sure the speed signal you are getting is accurate, and post a data log of getting it up to a high enough speed (around 50 mph at light load) to trigger an upshift. This will give everyone more to go on.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
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