This is on my ‘09 E350 with the 722.6 5 spd transmission. It’s driven about a 1,000 miles a year. Last year I noticed shifts feeling loose in 2-3 and 3-4 just before I put it in winter storage. I’ve driven it only a 150 miles this year and I’ve logged some data that I’m hoping someone here with more experience can help me understand what’s going.
In my limited experience with transmissions, am I looking at a valve body replacement or rebuild with Sonnax/Transgo shift improvement kits? The drop in fluid pressure seems to be real odd and might be causing the issues I’m having.
Is there anything else I can try before diving into a valve body replacement?
I had done a pan drop / filter change about 5k miles ago along with 13 pin connector and Pentosin 134 from FCP. This year, I’ve done a 3qt drain and fill twice (first with Pentosin 134 and second one with Maxlife ATF and added Lubeguard red). Really made no difference. Fluid is dark maroon/cherry color. 13 pin connector o-ring (on the wire harness side) is still dry.
In my limited experience with transmissions, am I looking at a valve body replacement or rebuild with Sonnax/Transgo shift improvement kits? The drop in fluid pressure seems to be real odd and might be causing the issues I’m having.
Is there anything else I can try before diving into a valve body replacement?
I had done a pan drop / filter change about 5k miles ago along with 13 pin connector and Pentosin 134 from FCP. This year, I’ve done a 3qt drain and fill twice (first with Pentosin 134 and second one with Maxlife ATF and added Lubeguard red). Really made no difference. Fluid is dark maroon/cherry color. 13 pin connector o-ring (on the wire harness side) is still dry.
