4L80E reverse boost valve question
4L80E reverse boost valve question I bought a Sonnax self-regulating reverse boost valve and installed it and noticed that the inner white spring is loose inside the outer purple spring, it can slide back and forth by about 3/8". I did not notice this when the took the stock valve out. Perhaps it's just because the boost valve is bottomed out in the boost valve sleeve. I just want to make sure I didn't make a dumb mistake.
Also the ATSG manual only shows one spring but mine had two?
Also the ATSG manual only shows one spring but mine had two?
My 2008 GM factory manual which is the same year as my 4L80E clearly shows two springs in several different diagrams.
The ATSG manual shows only one. They must have made a revision.
What year is your 4L80E?
Mike
The ATSG manual shows only one. They must have made a revision.
What year is your 4L80E?
Mike
It's a 99.
I think there is free play in the spring because the boost valve is bottomed out in the sleeve. Once there is pressure I suspect the boost valve will move up against the spring. I just wanted to make sure that I didn't assemble it incorrectly.
I think there is free play in the spring because the boost valve is bottomed out in the sleeve. Once there is pressure I suspect the boost valve will move up against the spring. I just wanted to make sure that I didn't assemble it incorrectly.
