Aisin 68 shift problems

LeroyVT

New member
So a few issues on my 07 CC. First off exhaust brake doesn't work. Dealer said he replaced it and now I got nothing. Next and more concerning truck shifts at 2200-2400 towing 14k and will not down shift. Pulling up a hill it did t downshift until 1100 rpm. Not sure what's going on. On thoughts? Thanks.
 
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