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  1. lmm72

    Allison 6sp: Allison TRANSGO A1LU-BST-04 test

    Thanks Mike I greatly appreciate it the cutback valve in the pump I was reading the ATSG manual and I think I figured out what I need to do , i'll live and learn, pressure in the cutback valve galley trips the cutback correct?!
  2. lmm72

    Allison 6sp: Allison TRANSGO A1LU-BST-04 test

    I am sure this has been discussed in earlier post, but I have been running test on the transgo A1LU-BST-04 boost valve... My findings on my own truck with addition to transgo jr Mikes PR spring I hold approximately 275-300 psi when TCC is unlocked and around 225-230 psi when TCC locks, will this...
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