Transmission Running Hot

[Fubar]

Originally Posted by HUMTECH

did'nt read the entire post but if your trans is getin hot enough to throw A warning(not just by the gauge) and your not towing you have an issue. New trucks should handle any environment without issue when left stock. Adding A supercharger will not affect trans temp unless you really work it up A steep grade with A lot of added weight as any H-2 will drop to 3rd and no tcc lock up while climbing A long grade. If you are towing and remove the trailer your trans shift adapts take A little while to adapt but should still not cause A heat concern. Have it checked out while under warranty even if it costs A few bucks, at least they have your concern on record if it fails 10k miles out of warranty.

Ya the issue is lack of air getting to the trans cooler caused mostly because of the inner-cooler for the S/C blocking 2/3rds of the front gril. So one of two things needs to happen; get more air to the trans cooler which isn't possible due to lack of space to mount a fan anywhere or locate a secondary cooler somewhere else under the truck with a fan and two thermal dynamics dictates that if you add more fluid you increase the ability to dissipate heat, add more fluid or increase the surface area said fluid transverses and both will reduce heat.

Enough to make a difference I don't know. But I have to start some place.

If there was actually something mechanically wrong with the trans the run hot condition would be present in day to day driving and not only when climbing steep or prolonged grades. However the truck never downshifts while going up the two passes between here and CA. I've always figured it was because there is now ample power being produced by the sc so that the trans doesn't need to hunt for a gear to help move the weight of the truck. The trans will downshift if I floor it (3000-3500rpms) going up the grade. But keep the rpms around 2000 and it never downshifts.

Here's some food for thought; from Vegas to Moab 400+ miles there is a 9000 foot pass that you go over and the truck has never over heated going up that pass. Between Vegas and Ca there are two 4000ft passes and on each and every trip I've made since having the SC installed two years ago April the trucks trans has gotten hot. I don't get it.. It has to have something to do with the grade % and the length and the reduded air flow to the cooler.

I'll check with my local dealership but I'm almost certain they are going to say the trans is not covered by warranty becasue of the supercharger.