Hey all, having some issues with the truck.
I know I have a bad boost leak, and need to pull my radiator to clean it off and out, mentioning these wondering if lack or air might be makin the computer act wierd..

For the trans, it's a DTT built by moonlight diesel, billet flex plate and input, 3rd gen intermediate and out put. Super single tc, vb for towing and light racing.

A week ago, it Suddenly started shifting from 1st to 2nd real early. Like 400 rpm early!
Then it stays in 2nd. 80 % of the time it won't go to 3rd. All the way up to 2500 + rpm in 2nd. I've tried the tricks, letting off suddenly, letting off lightly, stepping on it hard, let off hard then roll into it. Very seldom does any of that work, it just stays in 2nd!

I'll be takin it for a flush and band adjustment soon as possible, but anyone else have any other ideas?

TIA

 

All these guys out here that know so much, and no one even has a guess?