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

[lmm72]

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 cutback in psi (if reduced say 25psi instead of 50 or even 0%) cause issues down the road from raised pressures when TCC is locked?
Any ideas on this matter would be appreciated

 

[Mike L.]

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 cutback in psi (if reduced say 25psi instead of 50 or even 0%) cause issues down the road from raised pressures when TCC is locked?
Any ideas on this matter would be appreciated

No

 

[lmm72]

No

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?!