Had my 5100 installed on both front and rear. The front is set at 0.85. Now 4wd light is flashing, DAC light is on, and another light is also on... I searched the forum, most likely abs line was stretched by the mechanic during the installation. My question is how complex is to replace the line? Does the shock absorber need to be taken off in order to replace it? I need to get prepared to argue with mechanic tomorrow, so please help! Thanks!