Hemtt transmission temp

[Elideclan2]

To any Hemtt owners. Could you please share with me what uour operating temps are while driving. Mine seems to be running around 225-230 ( not verified with my surface temp gun)
it was hot here today 80's and I was driving in stop and go traffic.
In the coming days I will be switching the trans fluid over to the Allison approved "transynd"

thanks to everyone for all the advice. It's fourms like this that make this affliction possible.

 

[tim292stro]

That's not bad - if you get over 250, I'd start worrying. Heres what Allison says in the Operator's Manual:

 

[tim292stro]

When you put in the new transmission fluid, take a sample from the bottle and send it into a lab as a baseline (someone like Blackstone Labs, no endorsement, no affiliation). You can sample the transmission fluid on the severe duty cycle (6 months, 25K miles, 600 hours), and see if you can wait to service the fluid until the regular interval (48 months, 100K miles, 2400 hours).

The idea is that you take a sample of clean fluid before it comes in contact with your engine/transmission, and you can then see the breakdown of the fluid lubrication components as they wear out, and what deposits are leaching from the engine components into the fluid indicating any damage before it gets really expensive.

 

[Stalwart]

Mine takes a LONG time to get up to temperature, perhaps 30 minutes at freeway speeds but then goes up to about 10-20 degrees above the coolant temperature. I like oil temperatures above 212 as to keep the oil free of water contamination.

 

[Elideclan2]

I ran the Hemtt around town today. All stop and go. I had a temp indicated on the gauge of 225-230 degrees. I used my laser temp gun at got a reading of 200. Looks like my gauge or wires need some attention.

 

[tim292stro]

Check your grounds too - they make funny things happen when corroded. Was that the measured temp on the sump pan?

 

[Elideclan2]

All the wiring will now be inspected. The temps were similar through the whole of the transmission. Top to bottom varied only slightly.

 

[tim292stro]

At least it confirms your transmission is at a healthy temperature