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Old 05-11-2007, 04:47 PM   #1
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I have a 2006 Ambassador with the 330 ISC diesel. Just got back from warranty work and the dealer tells me that my transmission gauge is not supposed to move unless it gets real hot. The tech put it in gear and rev'd the engine until the gauge started to move. He also removed the sending wire and grounded it and it moved. They also replaced the sending unit. I still do not think the needle should stay in the cold position while running. There are two lines in the middle of the gauge for the normal range. Anyone elses' gauge do this?

Also, has anyone used the test strips for the antifreeze to see if there are enough of the additives. These worK?

Thanks s/Toby
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Old 05-11-2007, 04:47 PM   #2
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I have a 2006 Ambassador with the 330 ISC diesel. Just got back from warranty work and the dealer tells me that my transmission gauge is not supposed to move unless it gets real hot. The tech put it in gear and rev'd the engine until the gauge started to move. He also removed the sending wire and grounded it and it moved. They also replaced the sending unit. I still do not think the needle should stay in the cold position while running. There are two lines in the middle of the gauge for the normal range. Anyone elses' gauge do this?

Also, has anyone used the test strips for the antifreeze to see if there are enough of the additives. These worK?

Thanks s/Toby
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Old 05-11-2007, 05:14 PM   #3
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Toby,
I can't answer your question about your transmission guage but I can answer about the test strips.
I've used them several times. I can't say with any reliability that they are giving me a correct reading.
Here's why. First time I tested it told me my reading was on the low end at 1.2, so I added about two quarts of the already mixed coolant with the SCA additives in it. This did bring the reading up some. However the next time I checked it it was back down to the 1.2 units per gallon reading. I then added a pint of the concentrated SCA to the coolant resivoir. I then waited till I drove the motorhome to let it pull the coolant out of the resivoir which had the concentrated SCA in it. Tested again and the reading wasn't but maybe up to 1.5. Either I need to add another pint of concentrate which is unlikely according to the Cummins people or the test strips are somewhat unreliable. I really don't know any other way to get a reliable reading. I hope you have better luck with your readings. By the way I followed thedirections to the letter but by using the color codes its highly subjective on how you interpret that color to get your readings.
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Old 05-11-2007, 05:29 PM   #4
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Toby - I think we must have had the same tech, I got the same story AND the same test-procedure! Not sure if they're 'supposed' to work that way (if so, why do they make such a big gauge when most of it's unused??), but at least we have the same issues. My VMSpc, however, says the trans-temp is right where it's supposed to be (in the 165-185 range) so I quit worrying about it. Would be interested to hear other responses.

Letsgoagain - Wondering if you added the antifreeze/coolant to the engine reservoir or directly into the radiator. Not that doing that would give incorrect readings, but maybe tougher/longer for it to mix between the two.
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Old 05-12-2007, 10:48 AM   #5
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We have a 330 ISC and the Allison tranny with the synthetic tranny fluid.

The tranny, with the synthetic fluid will almost run too cool. It will reach around 180 degrees in normal driving and will rarely go over 200.

That is not enough to make your gauge move. My gauge moves maybe 1/8 inch, just enough to move over the first mark on the gauge. It is normal.

I got this information from an Allison seminar at the factory.
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Old 05-12-2007, 05:30 PM   #6
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Ronboc,
I did pour the additive directly into the reservoir. I looked all over for a radiator cap that was directly on the radiator but I couldn't find it. I agree that it might take longer to mix but I've driven it to Florida and back so I'm thinking if it's not mixed in yet it never will be.
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Old 05-12-2007, 06:01 PM   #7
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Thanks for the replies.

I still do not like the guage that doesnt show anything until its to late. Although the tech assured me the computers would shut it down before damage occures. I think I'll look around and see if I can buy one and put it in myself.

On the coolant additive, I need to get some strips and test mine. BTW, would it hurt if I put to much additive in? The dealer tech gave me two jugs of the stuff but said he didn't have anything to test it with. Another BTW, Walmart only sells the antifreeze that mixes with both the pink and green for the cars. I'll go to the auto store and get the right antifreeze for the MH.

Since my MH sat on the lot for over a year before I picked it up , I feel I need to change out all the fluids and filters and etc.

While MHs are not as bad as a sail boats, swimming pools and horses, it seems like there are always something to do on it.
s/Toby
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Old 05-14-2007, 04:19 PM   #8
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I have been watching my trans temp in the Aladdin Jr. display and have noticed that it does not move very much at all. The non-movement of the gauge concerned me at first, but when I confirmed the low temp on the Aladdin display, I worried a bit less.


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Old 05-14-2007, 08:35 PM   #9
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SacsTC almost had me take a picture of our temp gauges ... that always run cool.. so my advice on cool temp readings = is to not worry....



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Old 05-15-2007, 09:23 AM   #10
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Toby –
I agree. If we got a gauge, it oughtta do something productive besides fill the hole in the panel. Consider one of the after-market systems (VMS, SilverLeaf, Cummins RoadRelay, etc) that talk directly to the engine & trans computers. A lot easier than plumbing new lines.
Yes, you do need what the mfgr recommends, and in the right proportions. Try a truck-place for the additive/coolant.

Letsgoagain –
The fill-cap is buried up and under the rest of the big-metal stuff, making it very difficult to get to. I'd certainly say a trip of that length will circulate it. Some folks add to the reservoir, run the engine 5-minutes then test again, and wonder why they don't see a change.


If it helps any, the computers are a lot more accurate and helpful that a simple ˜idiot light/gauge', so they are going to help you keep things going without destruction.
Another factor is that the analog-gauges and computer-sensors are located in different places in the engine and trans, so we will see different readings.
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Old 05-15-2007, 01:50 PM   #11
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The only thing an aftermarket gauge will tell you is that a tranny with the synthetic fluid is running very cool. 180 degrees is not enough to make that gauge move much. I imagine a digital gauge would start somewhere around that figure and go up to maybe 250.

At the seminars at Allison the technician said the fluid runs on the borderline of being too cool. To my little brain that sounds like a good thing, it avoids glazing and burned fluid and if my gauge moves only 1/8th inch I am happy. I now have a reference point and if it goes higher then I worry.
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