Foretravel Owners' Forum

Foretravel Motorhome Forums => Foretravel Tech Talk => Topic started by: Protech Racing on August 09, 2021, 12:28:44 pm

Title: Cat 3208 with Allison 643 temps?
Post by: Protech Racing on August 09, 2021, 12:28:44 pm
  I tow a small 2 car trailer in FL. .95*  degrees ,  Stop and go traffic puts my trans temps up to about 230 as it pulls through  1 and 2 nd, Dropping to 190 ish as it locks up  . Are these normal temps ? 
  The engine never gets over 180 and I drive it easy .
 Thanks as always .
Title: Re: Cat 3208 with Allison 643 temps?
Post by: wolfe10 on August 09, 2021, 12:31:25 pm
Sounds normal with the torque converter unlocked.

About all you can do is slip it into neutral if stopped at a long light.  Rev the engine a little to get more air flow over the transmission cooler.
Title: Re: Cat 3208 with Allison 643 temps?
Post by: Pierce & Gaylie Stewart on August 09, 2021, 12:37:15 pm
  I tow a small 2 car trailer in FL. .95*  degrees ,  Stop and go traffic puts my trans temps up to about 230 as it pulls through  1 and 2 nd, Dropping to 190 ish as it locks up  . Are these normal temps ? 
  The engine never gets over 180 and I drive it easy .
 Thanks as always .
Sounds just like ours in city traffic. Our engine temp does go to 200 on grades in the summer and the tranny temp follows it.

Pierce
Title: Re: Cat 3208 with Allison 643 temps?
Post by: len.barron on August 10, 2021, 11:01:55 am
  I tow a small 2 car trailer in FL. .95*  degrees ,  Stop and go traffic puts my trans temps up to about 230 as it pulls through  1 and 2 nd, Dropping to 190 ish as it locks up  . Are these normal temps ? 
  The engine never gets over 180 and I drive it easy .
 Thanks as always .
I saw the same when I got my coach, I used an IR gun and found the actual temp to be in the 150's, installed a new sender and problem solved..
Transmission Temperature Sender Resistance (https://www.foreforums.com/index.php?topic=40845.msg405893#msg405893)