Agree with your thought. This is one of the drawbacks of a manual: uphill shift to 5th / resume CC, flat or downhill 6th / resume CC.
That is how it’s been in my JK—especially after going from 32’s to 34’s w/o regearing.
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Manual transmission - Clutch slipping at highway speeds with the cruise control on?
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That is how it’s been in my JK—especially after going from 32’s to 34’s w/o regearing.
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Definately not a traditional bogging down. 37s on my JK with 4.10 gears and it just starts slowing down with the manual. This is a very abrupt loss of power. Sometimes with a quick recovery. At first I thought is was misfires. No dash lights or maybe they just have a high tollerance for missfires built in.
I agree with you here, unless I am going downhill where load isn't an issue or on a flat where I can hold at lower RPM without boost, I favor going higher RPM without boost than low RPM with boost. Even in a non-turbo this gives better fuel economy in my experience and has to be even more beneficial than hitting boost.
There seems to be a belief that lowest RPMs is always the most economical and I've seen too many lug their engines with a manual and automatics almost always want the low RPM and require gas pedal further depressed than if it would shift into a lower gear. On my base with auto trans it will rather sit boosting a little than get into higher RPM with no boost. I am regularly hitting the button to force a downshift in these situations .
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An easy way to avoid all of this is to get an automatic 
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Automatic (thanks wife) with the V6. I set my cruise at 75 going up and down the mountains on the freeway. RPMs stay at 2.2 uphill and down...
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Modern 4cyls operate at higher RPMS. If you look at a dyno of this engine, once you drop below 2400rpms, you're in the suck. There is a learning curve going from other engines. Something I had to learn when I went from V8s to Toyota 4cyls. Same learning curve going from aircooled to water cooled engines on a motorcycle. RPMs used to be a bad thing, but that's not always the case now.
You can't drive this engine like a V8 or V6, or even a diesel and expect the same results. Stay in the power band for this engine though and it works great. Don't expect any power without heavy boost if you drop below 2500rpms.
You can't drive this engine like a V8 or V6, or even a diesel and expect the same results. Stay in the power band for this engine though and it works great. Don't expect any power without heavy boost if you drop below 2500rpms.
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6th is not the greatest to use.
fixed it for you
Seriously, you need a downhill road with a tailwind at 75mph+ for 6th to work
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I'm thinkin' the engine is doing some type of fail-safe action to protect from lugging. I've always felt that 5th was the perfect gear if cruising below 75, keeps you perfectly in the power band and returns decent MPG still.
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Actually you don't need to mess with the cruise when shifting, it will stay enabled. I love it.
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Update. This is what I have found with my 2.3, 2 door, Badlands, Sasquatch, manual, stock.
If you want to take a nap like drivers with automatic transmissions, leave it in fifth and set the cruise. It climbed every hill and fought every head wind without issue. Possibly lost an MPG maybe 2 doing this. Not a big deal.
You can use 6th with the cruise if you speed up before a hill or cancel cruise and modulate the throttle yourself. You can also downshift to fifth, with the cruise still active (it won't cancel the cruise), way before you get to that hill. Possibly gain that MPG back.
It seems that the manual Bronco has a failsafe while in 6th when it has to use too much throttle to maintain speed.
I'll treat this like I do my other vehicles and just cancel cruise for inclines to prevent downshifts or in this case, losing all power.
Thank you everyone for your insights and suggestions. It is a big weight lifted from my shoulders to have a solution to what I thought was a problem.
If you want to take a nap like drivers with automatic transmissions, leave it in fifth and set the cruise. It climbed every hill and fought every head wind without issue. Possibly lost an MPG maybe 2 doing this. Not a big deal.
You can use 6th with the cruise if you speed up before a hill or cancel cruise and modulate the throttle yourself. You can also downshift to fifth, with the cruise still active (it won't cancel the cruise), way before you get to that hill. Possibly gain that MPG back.
It seems that the manual Bronco has a failsafe while in 6th when it has to use too much throttle to maintain speed.
I'll treat this like I do my other vehicles and just cancel cruise for inclines to prevent downshifts or in this case, losing all power.
Thank you everyone for your insights and suggestions. It is a big weight lifted from my shoulders to have a solution to what I thought was a problem.
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Given what Tricky Dick says, you just need to simply downshift a you start up hills, and put her back in sixth once you’re over the crest. No messing with the CC needed because it stays engaged.
Happy man-shifting!
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I've found you have to do it well before you ge to the hill. More practice and I will have the timing down.
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Yeah it's a smart system and doesn't over rev when you push in the clutch. Makes freeway cruising a treat.
Well...don't that beat all. This was one reason why I chose an auto. I had an '89 F150 manual and though it had a disconnect for cruise on the clutch it would over rev every time, so I had to manually shut cruise off before a downshift (and that 5.0L needed that a lot in CO).
Like I say 'one reason", the other being I'm old as dirt and my knee may not last if running up and down through 6 all the time.
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