***This is a manual transmission.....not automatic...***
I've posted before and can't figure this out. I have a deleted 2012 Cascadia dd15 manual transmission.
The rpms are telling to shift 10 mph before I have to. Before.....I'm in 7th at 25mph....8th at 35mph and s fourth.
Now....im in 7th at 15 to 18mph at 1500 rpm.....im in 8th at 25mph at 1500 rpm.
What's the issue here? I had a new cluth put in 7 months ago, and this issue has been going on for almost a year.
I had mechanic check and adjust ECM and made adjustments about 2 weeks ago. Still didn't fix issue.....
What do you think the issue is with this....can it be a transmission issue or something? Was the clutch put in wrong?
Thanks
Rpms causing shifting too early....2012 Cascadia
Discussion in 'Ask An Owner Operator' started by trucky909, Mar 29, 2020.
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the engine doesn't figure out how you want to shift, you figure out how it needs to be shifted.
Bean Jr. Thanks this. -
I need to know why is it like this now, because it wasn't before.Last edited: Mar 29, 2020
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What is telling you to shift? The driving I've done with a 10 speed didn't have any indicator other than the tach and speedometer. The truck was a 2016 Freightliner.
I just re-read your post and your description looks like you have an auto shifter not a manual. Need a bit more clarification please. -
20-25 mph in 8th doesn't sound right.
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Do you have one of those progressive shift programs in your software that needs to be turned off?
blairandgretchen Thanks this. -
That year range of cascadia is known for the clusters going bad. Usually it’s the Speedo that ends up being off but sometimes it’s the tach. Bet your fuel gauge is probably wonky too. That’s usually the first thing that starts failing. The fix is to replace the cluster.
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Your Engine decides when to shift. A properly matched automatic will know when it's time to shift off the current engine situation.
There are two RPM numbers to shift at up or down. Thats it. Nothing complicated. Road speed means nothing.
You are not doing 25 at 8th gear. It wont work. Thus instruments are false. Have a shop look at them closely. -
So don't move the stick to the next gear until the RPM comes up to where it needs to be.
What's the issue with that. Your hand moves the gearshift, your feet run the clutch and throttle.Dave1837 Thanks this. -
What speed are you doing in 9th and 10th?
Bean Jr. Thanks this.
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