So my trans is getting hotter than I want while towing in the summer weather...
This has been discussed and I've given advice to many on this. My mods are in my sig
I tow a bumper pull camper at around 60-65 mph. It's BIG. 8500 lbs.. 32ft
When ambient temps are under 85* it's fine... but when gets over that my highway trans
temps creep up to 210-218*(highest I've seen) and my coolant temp creeps from about
200* also up to about 215* (not that concerning imo, on coolant temp)...
The sweet spot for speed (avoiding wind/sway/etc) is the 62-65. This generally puts
me between gears 4 & 5. Uphill or slight grade have to do 4th. Downhill or slight down can
shift into 5th gear.
The weird thing is that it wants to heat up more in 4th gear which makes no sense to me.
The 1.15:1 gear puts me at about 2500-2600 rpms in lockup. 5th gear is .85:1 so it's
a slight overdrive rpms are 1920-2050.... 5th gear really 'lugs' and I can watch all my
aftermarket gadgets showing lockup, temps, load, wideband afr, trims, etc etc
From everything I understand, I should run cooler in 4th gear even though the rpms are higher...
It's not really working so hard as far as load or throttle position, just more rpm.
I have my trans setup to stay in lockup so it's not a slip or TC issue. So I'm perplexed.
The only thing I can think of is something is off in my tune to "cruise" at 2600 rpm in 4th gear
decreasing my MPG and creating more heat....
Thanks for looking !!!
This has been discussed and I've given advice to many on this. My mods are in my sig
I tow a bumper pull camper at around 60-65 mph. It's BIG. 8500 lbs.. 32ft
When ambient temps are under 85* it's fine... but when gets over that my highway trans
temps creep up to 210-218*(highest I've seen) and my coolant temp creeps from about
200* also up to about 215* (not that concerning imo, on coolant temp)...
The sweet spot for speed (avoiding wind/sway/etc) is the 62-65. This generally puts
me between gears 4 & 5. Uphill or slight grade have to do 4th. Downhill or slight down can
shift into 5th gear.
The weird thing is that it wants to heat up more in 4th gear which makes no sense to me.
The 1.15:1 gear puts me at about 2500-2600 rpms in lockup. 5th gear is .85:1 so it's
a slight overdrive rpms are 1920-2050.... 5th gear really 'lugs' and I can watch all my
aftermarket gadgets showing lockup, temps, load, wideband afr, trims, etc etc
From everything I understand, I should run cooler in 4th gear even though the rpms are higher...
It's not really working so hard as far as load or throttle position, just more rpm.
I have my trans setup to stay in lockup so it's not a slip or TC issue. So I'm perplexed.
The only thing I can think of is something is off in my tune to "cruise" at 2600 rpm in 4th gear
decreasing my MPG and creating more heat....
Thanks for looking !!!
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