ZF8 slipping/rough shifting w/ no service message.. TC?

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theWillis2014

Junior Member
Joined
May 25, 2021
Posts
4
Reaction score
3
Location
Alabama
Ram Year
2014
Engine
5.7 Hemi
No codes/messages on my truck, but the Xmsn shifts rough intermittently (worse in ‘eco’ mode) and surges (tach rev ~100-300 rpm) constantly at speed. Most noticeable between 35-55 mph (worse in ‘eco’ mode).. I know that if the xmsn is coming apart and not shifting correctly, it will throw codes that say something like ‘incorrect gear ratio 1:2’ or something. I can’t remember exactly.. but I don’t have any messages at all besides brake light out.. had stealership reset the xmsn control module. Did nothing. Could it just be a bad TC? Thx in advance. Can’t be the only one..
 

Daw14

Senior Member
Joined
Nov 29, 2017
Posts
2,053
Reaction score
2,127
Ram Year
2014
Engine
5.7 hemi
How many miles ? Have you serviced by changing filter , fluid and maybe a new pan ?
 
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