Valor
Active member
- 185
- 194
- 43
- Location
- Apple Valley, Ca.
I already have the 700R4. The vehicle is a civy suburban. I'm wanting to keep the vacuum pump for the HVAC controls as they are vacuum operated. Just trying to get a tach to work in the thing. I also have one of those ess sending units for the HJMMVEE. If you ever get yours hooked up and working, could you please share your wiring setup? Thanks.That is the same tach that I plan to use in my new gauge panel. Because I am swapping the TH400 for a 700R4, I won't need the vacuum pump anymore, so I installed a HMMWV oil pump drive with tach sender on top. It seems pretty simple to hook up, 24v in and 24v to ground, with the 2-wire signal from the sender going to the other 2 posts. Are you planning on keeping the TH400 transmission which requires vacuum?
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