Crawler gear in Bronco explained by Engineering Explained

[Lewisj41]

Also validated your reasoning for not buying a Tesla roadster just in case you were considering. Only 10,000 n•m of wheel torque. C'mon Elon!?

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[LoneStar]

Love it! Further reinforcing my decision (or inclination) to go with 2-Dr Badlands for the MT/Crawler gear. At least the Badlands comes equipped with upgraded/taller suspension and 33" tires.

 

[Squatch]

Imagine the work the brakes have to do to stop all that torque.... better have some good brakes

If only there was some sort of mystical third pedal that did something...

;-)

 

[broncoenthusiast]

What Ford did with the MT and crawler gear in the bronco is SICK! Or whoever is building the tranny, cant think right now

 

[FstFrd00]

but no SAsQuaTcH!

lol
maybe thats why he used 33" tires

 

[BroAD]

One of my biggest concerns regarding the 2.3l versus the 2.7l is the type of injection. The 2.3l has direct injection but the 2.7l has both direct & port injection. And, since the M/T only comes on the 2.3l engine, it makes this decision even more challenging.

With direct injection engines only, there is a huge concern for carbon deposits on the valves. Since direct injection only injects fuel into the cylinder, it doesn't "clean" the valve stems which causes buildup.

This is big problem with my 2012 F-150 Ecoboost 3.5l engine where I have to spray CRC Intake Valve cleaner into the engine every oil change to ensure I don't have to use an aggressive technique such as walnut blasting to remove the carbon deposits. With a direct & port injection engine, fuel is both sprayed directly into the cylinder as well as the chamber before the valves.

Jason from Engineering Explained has a great video on the differences between direct injection and direct & port injection:

Why New Cars Are Using Both Direct & Port Fuel Injection

Hope this helps everyone or just adds more questions to your overall decision.

 

[Fordboi]

This YouTube channel is full of great information. I am brand new to the off-road community and really needed some help understanding the difference between HP and torque as well as drive ratios. Any questions you may have about the concept, this guy has a video for it.

Great Stuff...

if you still need help, speed is how fast you hit the wall. torque is how far you move it under pressure

 

[Fordboi]

What Ford did with the MT and crawler gear in the bronco is SICK! Or whoever is building the tranny, cant think right now

getrag... or was that sarcastic? lol

 

[rcbickle]

I feel I should at least get a couple of Continuing Education Credits! LOL. Thanks for posting!

 

[chipbutty]

1-6mph in Crawler gear? Sounds like the Crawler will be the best option for stop and go traffic! haha

C stands for Commuter Gear

 

[Mechjk43]

He is modelling the Bronco with just 1 wheel on the ground, using a max of 5000 lb-ft of torque. I would guess in granny gear, you would have the sway bar disconnected and both lockers engaged, so you would be able to use a lot more of the available torque.

You would still end up with the same result with all 4 tires on the ground.

 

[kodiakisland]

It's great to see the return of the granny gear. There was a time when trucks came with a low (crawl) gear standard on the transmissions. Seemed to disappear in the late 70s or so.

 

[truth2ak]

The brakes have to stop 40K NM of wheel torque

I may be mistaken but I think the idea is let out the clutch, keep foot "off of break" and let the Cgear do the work.

 

[kairo]

That was a clear, concise, well delivered video. Excellent.

On the flip side though, doesn't an automatics torque converter add some sort of theoretical additional crawl ratio? I would imagine when you get down to it, the auto crawls only a bit faster than the manual.

95:1 is phenomenal in a factory stick though. Hell, a lot of my built jeeps with 5 speeds weren't even close to that and they still did fine for bumpy trails.

I'm gonna pull some numbers out of memory (and my butt) but I think a rubicon is 4.5 first x 4 transfer case x 4.10 (or 4.56?) rear axle. So a factory rubicon gets you something like 74:1. 95:1 is a beast.

Even my old '79 ford. 7 first x 2.5 (?) transfer case x 4.56 only equaled 80:1

 

[BAUS67]

I remember seeing somewhere that Ford said you would not even need to disengage the clutch to start the truck while in crawler gear. Just crank over and you're off, pretty awesome!

Pretty easy to do, just find neutral safety switch, unplug, install a jumper wire so the ECM thinks the clutch is in all the time. Did this mod in my TJ. Good for starting in gear when off road and you don't want to drift back.

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