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Old 05-29-2019, 08:15 PM   #1
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Over Revving

Making a new thread for this, although I did bring it up on another one.

In the past couple of weeks, it's started over-revving when I shift into third. Normally I would immediately think transmission but I'm wondering if there's anything else that can cause this issue, since my rebuild is only 7,000 miles old. I vaguely remember reading something on oil burners about an over revving issue with IDIs, but I can't find it now.
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Old 05-29-2019, 08:31 PM   #2
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Is there a reputable transmission shop in your hood that you trust?
Based on your description it does sound like a slipping transmission. Hopefully not, but your bus doesn't have the real high tech computer controlled drivetrain that is common on newer 04-up busses that could, on extremely rare occasions, potentially, make this issue happen.

If no local transmission guy/gal is available to accompany you for a diagnostic road test, posting up the video mentioned in your coolant thread might help?
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Old 05-29-2019, 08:35 PM   #3
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7k on a rebuilt trans? if I was in your shoes i'd already be talking to whoever did the rebuild, probably pretty loudly. sorry man, that does indeed suck.
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Old 05-30-2019, 02:19 AM   #4
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really think a phone call is in order

I think you should telephone the place that "rebuilt" your transmission. Now. every time that transmission goes for a third gear and your engine speeds ups... I think not good news at all for the internal parts. I think the longer you wait on this one, the more likely you will be doing it again.

I really hate saying this.

william
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Old 05-30-2019, 07:29 AM   #5
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when you say over-revving.. is it just waiting to long to shift or does it flare severely on the shift? at part throttle does it shift better than at full? check the modulator cable to make sure its tensioned correctly?
-Christopher
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Old 06-01-2019, 11:31 AM   #6
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Quote:
Originally Posted by magnakansas View Post
I think you should telephone the place that "rebuilt" your transmission. Now. every time that transmission goes for a third gear and your engine speeds ups... I think not good news at all for the internal parts. I think the longer you wait on this one, the more likely you will be doing it again.

I really hate saying this.

william
I hate you saying it, too, but you are probably right. I haven't been driving really so I don't have video but I will get some today.
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Old 06-08-2019, 10:02 AM   #7
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Well thanks to DawgBs (different name on YT) for mentioning overdrive in the comments on this video - I think this is the problem and will be running some tests today! But meanwhile here is the latest video which touches on this issue (as well as coolant).

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Old 06-13-2019, 04:45 PM   #8
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OK, here is a video I was finally able to get. It's just a short audio clip, but please tell me what you hear.

I had the transmission flushed and refilled. It seemed like things might have gotten little better. But the problem isn't gone. It's been suggested this is a problem with an overdrive sensor. So I tried driving with overdrive off when going under 50 mph, and even with the overdrive turned off this happened occasionally, which makes me doubt it's an overdrive problem.

Of course I know no one can definitively dignose this from a little audio, but I have to jump through a bunch of hoops to get the warranty honored here in MA, so if there's another possibility that comes to mind, I'd love to check it out.

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Old 06-13-2019, 07:34 PM   #9
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If I was you Mary, I'd find a transmission shop that you trust locally. Then request an appointment with a tech to take a quick road test with you to diagnose if its the transmission malfunctioning or simply an adjustment needed.
The vid you posted is too vague to be able to give you good, reliable, analysis. A specialist needs to experience the issue in person in order to definitively diagnose the problem.

I know I've repeated myself above, but unfortunately nobody will be able to tell you if its good or bad from that short soundbite. All they'd be doing is "wag"-ing it, (wild ass guessing).

I really wish I could help you further but having a transmission expert road test it, is what you really need in order to solve this issue.
A reputable and honest shop will not charge you for the road test/analysis.
Good luck, and let us know what he/she finds...
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Old 06-13-2019, 07:39 PM   #10
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Quote:
Originally Posted by peteg59 View Post
If I was you Mary, I'd find a transmission shop that you trust locally. Then request an appointment with a tech to take a quick road test with you to diagnose if its the transmission malfunctioning or simply an adjustment needed.
I got three names from the original shop that did the rebuild today, so I'll be calling them tomorrow. They don't really know anything about these shops, though... it's the "shop you trust" part that is so difficult. At this point, with the things I've dealt with - gas in the tanks, wrong parts installed, spending a month in the shop but getitng worked on for half an hour - I don't really trust anybody. I'm just gonna have to read the reviews and pick one.

I posted this by request but I forget who requested it. Anyway, there is is if it jogs anyone's mind or anything.
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