Hot fluid smell

[Hpimichael02]

Hey guys I'm starting to notice a hot fluid smell radiating from the front of the truck , no leaks and no radi fluid in the oil , could this be a sign of front diff fluid getting old or tranny fluid getting thinned ? Both are due for changing 2k miles ago , or something more serious , kinda smells like radi fluid but I don't have a leak , I frost smelt it when I got the truck warmed in 4wd off road then go through water kinda the same smell any ideas?

[fishsticks]

Does it smell like coolant? If so it's probably your radiator cap needing replacement. It won't necessarily leak but it's not holding proper pressure.

[Hpimichael02]

Yes is does and my Efan needs to be all 97% of the time and the temp is slightly higher , would that cause this?

[fishsticks]

Yes is does and my Efan needs to be all 97% of the time and the temp is slightly higher , would that cause this?

Age. The caps wear out.

[Hpimichael02]

Thank you , ima change it soon , buts it's 5 years old goin on 6