Brucie, ask your trans guys why the Allison 643 in my moho heats oil FAST in second gear. Towing, when it drop to 2nd, the trans oil goes from 195 to 240 in minutes. I try to back off in second and get her into 3rd when the temp begins to drop and goes right back to 195 in 4th.
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Thread: Allison 1000 transmission
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08-20-2014, 05:56 PM #1Senior Member
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08-20-2014, 05:59 PM #2Already miss the 310/562
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I'm going to check and see if the masters suggest a follow up change to get more of the original/conventional fluid out of the system, the converter itself holds a bunch of fluid in these bad boyz... I don't think its an issue but I will check and see what they say... The fluid manufacturers say its ok to mix but I will see if these guys have a different opinion...
Originally Posted by Stainless
Will do Capn... Originally Posted by CampbellCarl
Last edited by 2manymustangs; 08-20-2014 at 06:08 PM.
-In a Republic, the sovereignty resides with the people themselves. In a Republic, the government is a servant of the people, and obliged to its owner, We the People..
"Remember, democracy never lasts long. It soon wastes, exhausts, and murders itself. There never was a democracy yet that did not commit suicide." John Adams
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09-18-2014, 05:19 AM #3Already miss the 310/562
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As per YODA, there is an adjustable lock up valve/modulator (AKA "clicker dicker" Originally Posted by CampbellCarl
) that controls where your converter locks up. SOme applications are set up to lock the converter at/in different shifts (works off the line pressure and is adjustable).
As we all know, a converter that isn't in lockup OR in the case of towing, possibly not in lock up AND not in fluid coupling (slipping) you will get LOTS-O-HEAT.
The adjustable lock up of the converter is set differently depending on the application of the transmission. As per YODA most of the time this trans is set to lock up at the same time as your 1-2 shift but it could be different in a moho.
If this heating is something you have been seeing for a long time I would guess that all is OK and when you are towing in 2nd your converter isn't locked and the slippage is heating the fluid. WHen the converter gets to the point of "fluid coupling" the heating effect of the oil goes way way down. (think of driving a drag car on the street that has a high stall converter, they get HOT).....
No way of knowing for sure what your lock up is set for in your moho, the manufacturer may be able to tell you that. It's a possibility that you have a set of clutches slipping but you would see this getting worse and worse over time I would think.
Sorry for the delayed answer big feller...
-In a Republic, the sovereignty resides with the people themselves. In a Republic, the government is a servant of the people, and obliged to its owner, We the People..
"Remember, democracy never lasts long. It soon wastes, exhausts, and murders itself. There never was a democracy yet that did not commit suicide." John Adams
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09-18-2014, 09:34 AM #4Senior Member
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Great transmission!
I was a little overkill with my 6 speed 1000. I'd change the fluid every 30k, Wix external spin on filter every oil change, and drop the pan to swap internal filter (also Wix) at every 50k. I'm one of those guys that you want to buy something used from!
My truck was lifted, tuned and got some serious use. I never had any transmission issues and never noticed enough debris on the magnet to worry over. I sent trans fluid and oil samples to the lab yearly for analysis.
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09-18-2014, 01:32 PM #5Already miss the 310/562
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Better to OVERkill than UNDERkill IMHO... Originally Posted by niceguyeddie
Great transmission!
I was a little overkill with my 6 speed 1000. I'd change the fluid every 30k, Wix external spin on filter every oil change, and drop the pan to swap internal filter (also Wix) at every 50k. I'm one of those guys that you want to buy something used from!
My truck was lifted, tuned and got some serious use. I never had any transmission issues and never noticed enough debris on the magnet to worry over. I sent trans fluid and oil samples to the lab yearly for analysis.
-In a Republic, the sovereignty resides with the people themselves. In a Republic, the government is a servant of the people, and obliged to its owner, We the People..
"Remember, democracy never lasts long. It soon wastes, exhausts, and murders itself. There never was a democracy yet that did not commit suicide." John Adams
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09-19-2014, 10:30 AM #6Member
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I have a 3000 series Allison in my motorhome. When I changed the trans fluid in my motorhome I went on Allison's website and Mobil 1 Delvac synthetic trans fluid was on their approved list. I had also heard to only use the Transynd. I called Allison and spoke to a tech guy and he said use either Transynd or the Mobil 1. Anyone heard of any problems using Mobil 1?
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