Hey folks,

Do you know is our transmission has a built in bypass (that allows flow to the.cooler only when oil reaches a specific temperature)? I installed a new cooler and deleted the stock one, and I also added a temp gauge w probe. The probe is installed on the pressure line close to front of the car's radiator. I had to drive in city for almost an hour to register a temperature on the gauge (starts at 100 stops at 260). With an ir thermometer I checked the temperature and indeed, after pressure line passed 100 degrees, the gauge started to indicate. The transmission oil pan had about 130-ish degrees, but the pressure line had slightly over 100. In time, the pressure line temp started to rise, and so did the gauge, so this setup definitely reads accurate temperatures, just curious if the transmission opens a valve to allow fluid towards cooler only after a specific temperature reaches some value.

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2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.

If you're asking if there is a thermostat, yes, I believe there is.

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Silver 2006 KJ 2.8L CRD Limited:
GDE ECO Tune / Fumoto Valve / E-Tecno GX3123 7v Glow Plugs / 2nd Gen Fuel Head / Mishimoto RED Hoses / Rockers/Lifters @ 114k / Hayden FC + 11 Blade Nylon / Sears P1 Battery / Transgo 45RFE-HD2 Reprogramming Kit / Timken Front Bearings

Thanks hexus, thats what I was wondering. I'd assume that the thermal bypass (thermostat) is located inside transmission, correct? Also, anybody knows when it starts opening (what temperature) ?

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2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.