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KAIMIKAZEE
Joined: 18 Sep 2005
Posts: 130
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| Posted: Thu Jan 04, 2007 10:33 pm Post subject: super 10 with weird noise |
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any of you have a super 10 tranny?
you would know what i mean when you would split shift....
when you split shift like lets say from 5 to 6...usually when you are on 5 and when you push the shift button up and let go of the gas you would get a weird small grinding noise like it's trying to find 6th gear...but once you get on the gas pedal it would automatically pop right into 6th gear...
well just recently when i'm on 10th, and it's doing it more going down hill...i would let the truck coast while in gear of course but gently on the pedal not enough to get the truck going because of course i'm coasting, it would seem like the tranny is looking for a gear, i don't really know how to put it but that's what its doing...when i'm on the fuel it would stop, i don't recall anything like this at all...had the clutch changed like 70k miles ago...what could be the cause??
i'm afraid that it would all of a sudden just can't find the gear and i would be stranded....
any super 10 owners out there??? |
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Collard Greens
Joined: 17 Jul 2006
Posts: 182
Location: Jacksonville, FL
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| Posted: Sat Jan 06, 2007 2:37 pm Post subject: |
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| Sounds like the synchronizer is bad. |
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JoeyB
Joined: 03 Dec 2006
Posts: 85
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| Posted: Sat Jan 06, 2007 9:40 pm Post subject: |
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Well, it wouldn't be the clutch, that's out of the picture.
Now I'm not all together familiar with this transmission, but if I understand it, it's a 5 speed and you split every gear using the same driving technique you would use for splitting the gears on a 13 speed.
If that's correct, then I don't think you have synchros as such, either.
When it it's doing this "looking for a gear" thing, is it still in gear? In other words, when you start down the hill, does it come out of gear, look around for a gear, then go back in gear when you hit the fuel? |
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Rawlco
Joined: 25 Jan 2006
Posts: 1124
Location: Central Maine
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| Posted: Sat Jan 06, 2007 10:25 pm Post subject: |
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Are you trying to shift with the jake brake on? That will sometimes cause the air shift unit to miss the gear since the engine speed drops too quickly. The unit will grab the gear when you accelerate again.
Of course if you are rolling down a hill and accelerating you may just need to skip 9th and go directly from 8th to 10th.
I also won't rule out a problem with the air shift unit itself. If the problems continue or get worse you may need to replace the air shift unit or at least some gaskets in it. Good luck. |
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KAIMIKAZEE
Joined: 18 Sep 2005
Posts: 130
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| Posted: Sun Jan 07, 2007 2:21 pm Post subject: |
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JoeyB wrote: Well, it wouldn't be the clutch, that's out of the picture.
Now I'm not all together familiar with this transmission, but if I understand it, it's a 5 speed and you split every gear using the same driving technique you would use for splitting the gears on a 13 speed.
If that's correct, then I don't think you have synchros as such, either.
When it it's doing this "looking for a gear" thing, is it still in gear? In other words, when you start down the hill, does it come out of gear, look around for a gear, then go back in gear when you hit the fuel?
yes it's still in gear when it's causing that wieird noise, and yes it would stop if i hit the fuel.... |
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KAIMIKAZEE
Joined: 18 Sep 2005
Posts: 130
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| Posted: Sun Jan 07, 2007 2:22 pm Post subject: |
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I also won't rule out a problem with the air shift unit itself. If the problems continue or get worse you may need to replace the air shift unit or at least some gaskets in it. Good luck.[/quote]
how much does it cost for the air shift unit?? |
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KAIMIKAZEE
Joined: 18 Sep 2005
Posts: 130
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| Posted: Sun Jan 07, 2007 2:23 pm Post subject: |
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I also won't rule out a problem with the air shift unit itself. If the problems continue or get worse you may need to replace the air shift unit or at least some gaskets in it. Good luck.[/quote]
how much does it cost for the air shift unit?? |
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JoeyB
Joined: 03 Dec 2006
Posts: 85
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| Posted: Sun Jan 07, 2007 7:16 pm Post subject: |
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| After a great deal of thought, I'd say I don't know. And I'm sure about that. |
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stranger
Joined: 08 Oct 2006
Posts: 59
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| Posted: Mon Jan 08, 2007 2:27 am Post subject: |
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The gears in the splitter box are most likely wearing out. The box is on the rear of the transmission.
Every gear you split that you don't move the shifter on, the splitter gears will grind until the rpms match, then the splitter will complete the shift.
After enough times of this happening the gears will wear down. This is just the way the transmission is designed, and should not be a real expensive or hard repair. |
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KAIMIKAZEE
Joined: 18 Sep 2005
Posts: 130
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| Posted: Mon Jan 08, 2007 3:55 pm Post subject: |
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stranger wrote: The gears in the splitter box are most likely wearing out. The box is on the rear of the transmission.
Every gear you split that you don't move the shifter on, the splitter gears will grind until the rpms match, then the splitter will complete the shift.
After enough times of this happening the gears will wear down. This is just the way the transmission is designed, and should not be a real expensive or hard repair.
nicely written!!!! :lol:
i take it this happened to you once???? i'll look into that splitter box....
you wouldn't happen to know the price for a new or reman. splitter box??? |
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stranger
Joined: 08 Oct 2006
Posts: 59
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| Posted: Mon Jan 08, 2007 5:03 pm Post subject: |
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Mine never wore out, but I know of others that have, plus the splitter is basically the same as a 13 speed splitter which in the past has been known for this type of wear problem.
To keep the wear down on mine, I would pre-select, let off fuel and shift to neutral at the same time, listen for the click of the splitter changing, then return the shifter to the same gear I had just left.
It is extra work to move the shifter every gear change, but it speeds up the gear change a great deal, especially if you are in a Detroit, which seems to take forever to drop rpms. Plus, this makes for a much smoother shift, with much less wear on the splitter gears due to the decreased time involved in the rpm drop until the transmission gears synchronize. |
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bob h
Joined: 15 Oct 2006
Posts: 664
Location: Nb
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| Posted: Mon Jan 08, 2007 5:19 pm Post subject: |
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stranger wrote: The gears in the splitter box are most likely wearing out. The box is on the rear of the transmission.
Every gear you split that you don't move the shifter on, the splitter gears will grind until the rpms match, then the splitter will complete the shift.
After enough times of this happening the gears will wear down. This is just the way the transmission is designed, and should not be a real expensive or hard repair.
are you referring to the "back half" (or auxilliary section) of the transmission, OR a valve? |
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bob h
Joined: 15 Oct 2006
Posts: 664
Location: Nb
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| Posted: Mon Jan 08, 2007 5:21 pm Post subject: |
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stranger wrote: Mine never wore out, but I know of others that have, plus the splitter is basically the same as a 13 speed splitter which in the past has been known for this type of wear problem.
To keep the wear down on mine, I would pre-select, let off fuel and shift to neutral at the same time, listen for the click of the splitter changing, then return the shifter to the same gear I had just left.
It is extra work to move the shifter every gear change, but it speeds up the gear change a great deal, especially if you are in a Detroit, which seems to take forever to drop rpms. Plus, this makes for a much smoother shift, with much less wear on the splitter gears due to the decreased time involved in the rpm drop until the transmission gears synchronize.
did you ever drive a series 50? |
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Birken Vogt
Joined: 29 Nov 2006
Posts: 102
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| Posted: Mon Jan 08, 2007 10:11 pm Post subject: |
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stranger wrote: Mine never wore out, but I know of others that have, plus the splitter is basically the same as a 13 speed splitter which in the past has been known for this type of wear problem.
To keep the wear down on mine, I would pre-select, let off fuel and shift to neutral at the same time, listen for the click of the splitter changing, then return the shifter to the same gear I had just left.
It is extra work to move the shifter every gear change, but it speeds up the gear change a great deal, especially if you are in a Detroit, which seems to take forever to drop rpms. Plus, this makes for a much smoother shift, with much less wear on the splitter gears due to the decreased time involved in the rpm drop until the transmission gears synchronize.
Wouldn't simply pushing in the clutch while the split shift was taking place have the same effect, or does the added inertia of the countershafts and clutch discs make that much difference to the splitter?
Birken |
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allan5oh
Joined: 26 Aug 2005
Posts: 2151
Location: jackassville (winnipeg, mb)
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| Posted: Mon Jan 08, 2007 10:30 pm Post subject: |
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I have a similar problem with mine, only when it's cold out though. I usually skip from 3rd to high range "low" which is the same as fourth, then go to fifth, and continue on.
I find shifting at the lowest possible rpm really helps as well. |
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