trans temp

[3500HD]

changed trans filter and installed gauges 3wks ago temps were 170. made 2 trips to town yesterday 15 mi.round trip trans got to 185 on way home droped to 170 in driveway when I got home. 2nd trip temp got to 200. no load weight 9300# empty. outside air temp was 20 deg cooler than when first installed. sensor is in test port any idea what is causing this. thanks

[Dvldog 8793]

Howdy
Assuming that you don't have a fried Trans. You might want to check and make sure that the threads on your sender are clean and that it is making a good ground contact with the vehicle.
Hope this helps.....
L8r
Conley

[3500HD]

checked wires & ground all ok same as when I insalled them them. only thing changed is I put glow plugs in this past monday

[3500HD]

First off thanks to Dvldog your answers have been of great help! just drove truck to get fuel 6mi temp 0 air temp 65 drove 10mi trans got to 160 cut thru town stop & go 3mi trans 170 back on hiway droped to 165 parked in drive let idel for 5 min up to 185.

[rjschoolcraft]

Those don't really sound all that out-of line to me. Mine often sees 200 running solo.

[3500HD]

thanks ronniejoe! First time with this truck and I'm still learning

[Dvldog 8793]

Howdy
My trans temp runs about 140* no load year around and MAYBE as high as 180 with a good load on her. I use Mobile 1 ATF and have a Maghytech pan that gives me 2 extra qrts.
L8r
Conley

[rjwest]

Temps sound normal. Temp will drop quickly
as soon as TCC locks,

Going down hill in lower gear will also raise temps,
TCC is unlocked and providing braking.

Temps are cooler when pulling a hill if down shift.( Higher RPM , lower tran temps.
.Highest temps are at low rpm, , loaded , torque
converter doing all the work

With a Heavey load, on a hill you will see temps
close to 300 degrees.....

If heavy and slow, you may need a bigger pan and additional cooling.

[3500HD]

Thanks guys for all the help! ran a lot of trips today never seen temps over 170. yesterday just thru me. thanks again