Harry,
I have it in my transmission and I love it! The trans seems to shift alot softer and smoother. It also took out some of the whine from the trans also. I put it in about a week ago. I still have to put it in my tranfer case. I feel it is a good product. I don't have gauges yet so I can't say anything about temp. changes.
Sparky
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1999 2500 SLT, QC, LB, 4x4, White, 4. 10 gears/Limited slip, Trailer/Suspension Package, Auto transmission, Westin SS Nerf Bars, Painless Wiring, Silencer Ring Missing, Mag-Hytec Diff. cover, Amsoil front to rear and more coming (I Hope)!!!
Next addition, Gauges... ...
Pull a 30', Tahoe 5th Wheel (8800 lbs. ) and hardly know it's back there!!