01-02-2023, 04:42 PM
Not sure what this is called but I have been cleaning the underside of the bus the last couple of days. Today while continuing on my degreasification, I heard and felt bubbling in the transmission oil pan. I believe this fitting is leaking air into the transmission. I have my 120v compressor on so the system is always pressurized. One of the great things of having a pit is finding crap you would never had known was at fault! The piece in question is where the blue air line goes into.
Edit:
After a couple hours of research and cross referencing, I found the part. For those of you with the HT740 transmissions, this is a Williams Controls air modulator. Part number is WM775B or 117830. Prices range from a low of $60 to a high of $407. Found a new one on eBay for $160 delivered. Most places were out of stock or you had to call to see if they were available.
Edit:
After a couple hours of research and cross referencing, I found the part. For those of you with the HT740 transmissions, this is a Williams Controls air modulator. Part number is WM775B or 117830. Prices range from a low of $60 to a high of $407. Found a new one on eBay for $160 delivered. Most places were out of stock or you had to call to see if they were available.
--Simon
1993 8v92TA #312