Went to go for a ride today and no [D] Nothing at all on the selector switch. CEL light came on DIC said Range shift inhibited. Put it back to park then drive and then it would go but only up to second gear. So I shut it off and restarted now its fine. So I went to Autozone and they pulled up P0751, P0762, P0848, PO877, P0700 He asked me if I had a power adders and I said no. Last week I had two codes P0877, P0756 Thats all the dealer did was check oil level and adjust shift cable. Week befor that they drained 28oz of ATF out, said it was overfilled because it was puking oil out of the vent. Could it be the Transgo Jr. I had Eric put it in and I thought it would be good for the Tranny because I tow a 5er. I've read all the codes, Does any one know what might be going on? Thanks

Was looking up all the codes and forgot to go back to Allison OEM. Could you please move it for me.