I was driving at a steady 80mph in my truck today on the highway for about 2.5 hours. The truck ran fine didn't shift much at all at that speed when I was pulling off the highway I glanced at my guages and my trans temp was pinned at 280 deg. So I pulled over as quickly as I could safely and put the truck in neutral to check the fluid. Checked the fluid and it was fine didnt' smell burnt and wasnt low. I tapped on the amp box for the temp. guage and the guage went back to 165 deg. and I was pulled over for about 3 minutes. Anyone ever have problems with this happening to them?
-Eric

 

Yes it has happend to me last year. It was the amplifier box. Temperature would rise to 260 then fall to 120 within 1 minute. I kept stopping to check the dipstick just like you mentioned. After the 3rd or 4th time I put tape over the gauge to finish my trip. I called Dieselmanor and was infromed that they had problems with a few of the amplifier boxes. They sent me a whole new set, no problems. Seems that the gauge, amplifier box and probe are calibrated togeather and comes as a set. Hope yours is still under warranty.

 

You don't say what guages your running,but it also could be a bad ground to the sender.That happened to me.

 

i have had both my isspro tranny temp gauges (hot and cool side) since march- i have had three amp boxes replaced already- waiting on the arrival of the fourth!! they are on back order- not due in until the first or second week of august-according to isspro tech- they get them from overseas (no surprise) the manufacturing facility overseas was on strike.

 

cant even get my new one hooked up wouldnt hold the wires in had to order a new one