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Old 10-01-2018, 04:36 PM   #1
Mini-Skoolie
 
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Dt466e rpm

Have a 98 international 3800 series 6 window Dt466e with an at545 has 477 rears at 55 I'm running 2500 rpms my question is, is that too high rpms had conflicting answers from dealer one said it was okay the other said it was too high I think it's high but not too much expierence with a Dt466e. I was also wondering what that at545 likes to run at if I changed gear ratio if I would burn it up sooner pulling a 32 footer pulls great just takes a while would like to switch to a mt643 but not yet
thank you
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Old 10-01-2018, 04:49 PM   #2
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With that motor and gear ratio I would be looking first to swap tranny's, not gears. The more you push that 545 the quicker it will eat itself. With that motor/gear/and a 3060 mine is doing 80@2300
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Old 10-01-2018, 05:01 PM   #3
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Originally Posted by Gnomeskillet View Post
Have a 98 international 3800 series 6 window Dt466e with an at545 has 477 rears at 55 I'm running 2500 rpms my question is, is that too high rpms had conflicting answers from dealer one said it was okay the other said it was too high I think it's high but not too much expierence with a Dt466e. I was also wondering what that at545 likes to run at if I changed gear ratio if I would burn it up sooner pulling a 32 footer pulls great just takes a while would like to switch to a mt643 but not yet
thank you
643 is a nice upgrade.


I've got a Cat with a 545 and it cruises at 1800 rpm at 65mph. Got 4.11 rear axle ratio.
My old bus had a DT466 with 643 and 4.44 rear. It maxed out at 62 mph. So yours sounds about right for your setup.

I'd do gears then wait till the transmission shows signs of dying and upgrade it too.
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Old 10-02-2018, 05:09 AM   #4
Mini-Skoolie
 
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Awesome thank you guys I thought the gear ratio was limiting me will that 3060 go into a 98?
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Old 10-02-2018, 05:11 AM   #5
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Yeah so far it seems to be good knock on wood lol I read in a forum some where I can't recall that the at 545 didn't like low rpm but I could be mistaken
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Old 10-02-2018, 08:41 AM   #6
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Awesome thank you guys I thought the gear ratio was limiting me will that 3060 go into a 98?
I got one in my 99, same thing.
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Old 10-02-2018, 09:14 AM   #7
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That would be really nice to have a six speed I'll have to see if I can find one for a decent price what kind of harness does yours have?
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Old 10-02-2018, 02:37 PM   #8
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That would be really nice to have a six speed I'll have to see if I can find one for a decent price what kind of harness does yours have?



Mark's bus is a 466E, it uses the MD3060 TCM / harness which is standard to all 3060's.. and then there is a J1939 data link from his engine computer to the TCM for throttle / engine load data etc.. the 3060 harness is NOT the same as an allison 2000 harness.. nor is the TCM.





your Bus should be the same... any 3060 with its harness and electronics (including the shifter.. its electronic on a 3060).. will fit into your DT466.. you'll likely need the secondary mounting brackets for the frame ..


-Christopher
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Old 10-02-2018, 04:41 PM   #9
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If you're looking to replace with a 3060 I would highly recommend finding one that already has 6th gear open, it seems it's difficult to get Navistar to unlock them in our older buses.
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Old 10-02-2018, 05:19 PM   #10
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Originally Posted by o1marc View Post
If you're looking to replace with a 3060 I would highly recommend finding one that already has 6th gear open, it seems it's difficult to get Navistar to unlock them in our older buses.

+1, and its not the transmission, its the TCM, so if you end up needing to purchase a TCM (cant find one with the transmission), then purchase one from a vendor that sells it as a 6th unlocked TCM..



the allison 3060 transmission is always 6 gears.. just a matter of the Transmission computer allowing it to use all gears.. (allison transmissions use a separate computer from the engine computer.. called a TCM)


-Christopher
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