75CF611 Posted May 3, 2009 Share Posted May 3, 2009 I have a 75 CF611 with the Thermodyne 6 and allison ht-740 auto tranny. The williams air valve that is connected to the tranny and the throttle is leaking air and needs to be rebuilt. Where can I get one the dealer says it is a discontunied part. Quote 1975 Mack CF-600 Pumper. Link to comment Share on other sites More sharing options...
Firemack Posted May 3, 2009 Share Posted May 3, 2009 Try Paul Romano, He has lots of CF parts.He can be contacted at paulromano@pipeline.comFiremack Quote Link to comment Share on other sites More sharing options...
Maxville Truck Posted May 3, 2009 Share Posted May 3, 2009 I have a 75 CF611 with the Thermodyne 6 and allison ht-740 auto tranny. The williams air valve that is connected to the tranny and the throttle is leaking air and needs to be rebuilt. Where can I get one the dealer says it is a discontunied part.If your talking about the modulator (kickdown) valve down on the driver side right above the oil pan , that part should be available from allison (inland in Milwaukee) 800-236-6667. When you step down the throttle does air come out of the tranny breather, and some times fluid? You will need to give them your part number and serial number off the tranny tag. Good luck Quote Link to comment Share on other sites More sharing options...
75CF611 Posted May 3, 2009 Author Share Posted May 3, 2009 If your talking about the modulator (kickdown) valve down on the driver side right above the oil pan , that part should be available from allison (inland in Milwaukee) 800-236-6667. When you step down the throttle does air come out of the tranny breather, and some times fluid? You will need to give them your part number and serial number off the tranny tag. Good luckNo the diaphram has a hole in it and every time you press on the accelrator it leaks air. Quote 1975 Mack CF-600 Pumper. Link to comment Share on other sites More sharing options...
sandra williamson Posted April 3, 2019 Share Posted April 3, 2019 will do thanks if think of anything else would love to hear Quote Link to comment Share on other sites More sharing options...
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