As some of you know I will be using a Dakota A500/42RH behind my 273. I will not be using a computer to control the OD and LU functions but using the PATC pressure switch conversion instead. This kit consists of an adjustable vacuum/electric switch
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And 2 non adjustable pressure switches which are pre-set to 44 for OD and 52 for LU. There are user adjustable pressure switches available for extra cost of course
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The end user must provide the fitting(s) to install the pressure fittings and do the wiring to all the components
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The guy I bought ny transmissions from over at slant6.org mounted his directly to the #4 port on the transmission as suggested at PATC. I found a thread here on FABO where a member ran a line from the #4 hydraulic port to the engine compartment where he located his pressure switch assembly. I liked that idea should I ever decide to replace the non-adjustable OD and/or LU switches with adjustable switches.
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I finally decided on an unobtrusive location for the vacuum switch. After constructing a suitable bracket to mount the vacuum switch
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It got primed, painted black and the vacuum switch installed. i used the right mounting bolt on the starter relay to install it. It’s semi-hidden but still accessible if I ever need to replace it or adjust the vacuum setting
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For the pressure switch assembly i made a bracket
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Then epoxied it to the fitting. After it was dry, I then marked the passenger inner fender for the bracket, drilled the mounting holes, installed nut serts and installed the assembly. It also in an unobtrusive location under the blower motor yet easily accessible if needed.
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I cannot run the line from the transmission pressure oort to the fitting or run the wiring until the transmission is installed. It looks like a small job but was time consuming working a couple of hours a day over several days!
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