t98 heat...

So I got brave yesterday and put 140 miles on the jeep in 90+ degree heat. The only problem I ran into were:
1.vapor lock, every time I shut the jeep off, (I'll deal with that in due time), and the big one: The transmission get hot, really hot. I was wearing sandals for the trip and now have a blistered 2nd degree burn on my foot, it even seeped a little gear oil around the shifter boot at one point, but otherwise it sounds and performs as normal.....its full of fluid, and the fluid looks and smells like normal gear oil, (not burnt or anything).....is this a normal amount of heat for these after a few hours of driving? any one else have this problem

 

Pretty much normal. I've been working to reduce the heat at the firewall and trans tunnel. It's not due to your transmission, it's exhaust and engine heat. So far I've used header wrap and hi temp silicone sealer to reduce the exhaust heat. It reduced it enough to where you don't blister but it's still too hot for me. Next step is apllication of some heat/noise barrier in the tunnel and behind the exhaust piping. Final step will be interior heat/sound barrier and carpet (hope it doesn't come to that). I also replaced the Fresh Air Duct which helped the ambient heat down around our feet by forcing cooler air there (you may not have that feature). :v6:

 

Rocky gives some good advice - most of the heat under the chassis comes from the exhaust. Exhaust pipes get rocket hot, and the steel floors of a Jeep are very good at absorbing that heat. In cars with floor coverings (carpet), routing the exhaust too close to the floor will burn (literally) holes in the carpet and padding.

My parents had a '59 Dodge wagon with that problem - on vacation my job was to pour water on the floor to keep the carpet padding from igniting. A helpful garage owner in Utah fitted a plank of asbestos between the floor and the pipe, and problem solved.

If you can fit a shield between the exhaust and the floor, that will help a lot. This can be as simple as a piece of sheet metal with an air gap on both sides, between the exhaust and the floor. If you look at car bodies, you can see shields like this placed strategically between the exhaust and the body.

 

Ok....its comforting to know that its normal to be able to get 2nd degree burns from my floorboards, (i think)...now, one more temperature question since we are on the topic of exhaust heat: While driving home from work tonight, I happened to look through the hole around the brake pedal and noticed that I could see the front section of the exhaust pipe....I also noticed that the pipe was glowing red/orange....it stopped glowing after I got off the freeway.....Is this normal? Is it really supposed to get THAT hot?

 

That's not normal. I can't tell you what's causing it but it shouldn't get glowing hot. Timing too far advanced? Running terribly rich? Those are just guesses though.

 

Running too rich or too lean at highway speed, too many rpm, too much or too little timing can cause the exhaust pipe to turn red hot at high way speed. How many rpm's were you turning? Lots of variables here.

 

I run 2700 to 2900 usually on the freeway....timing was set to 5*btdc a few weeks ago....I'm going to check some things out with my carb and see if I can get any difference there....

 

Not sure that is normal on a Jeep, but I have seen it on a 454 truck towing a 40 ft gooseneck and a Buick V6 on a stationary snowmaking machine. The Jeep is pretty light and the V6 should not be working that hard, check as noted above, is the advance working properly?

 

Really sounds like timing.
need to double check that first.