Jake Break Question

This is from a logic stand point...

The jake break slows only the drive tires so you are not supposed to use it in slick conditions. However down shifting also only slows the drive tires... so why is down shifting better in slick conditions then the jake?

This is from a logic stand point...

The jake break slows only the drive tires so you are not supposed to use it in slick conditions. However down shifting also only slows the drive tires... so why is down shifting better in slick conditions then the jake?

That's actually something I'd like to know.. I never thought bout that.... Good question sir..

I'll take a guess tho, think it has something to do with the amount of torque going to the tires.. using the Jake, I think, uses more power then down shifting, which can cause the tires to break free.

That's my guess . Maybe someone else has an answer.

This is from a logic stand point...

The jake break slows only the drive tires so you are not supposed to use it in slick conditions. However down shifting also only slows the drive tires... so why is down shifting better in slick conditions then the jake?

That's actually something I'd like to know.. I never thought bout that.... Good question sir..

I'll take a guess tho, think it has something to do with the amount of torque going to the tires.. using the Jake, I think, uses more power then down shifting, which can cause the tires to break free.

That's my guess . Maybe someone else has an answer.

You can turn down the jake though going from 4th to 3rd at 1000 rims will be the same every time, won't it?

I don't know this for sure either, but if I understand it correctly, the engine brake is exactly that, a brake. And in slick conditions, you don't want to ride the brake, as that can cause a slip or spin out. By down shifting, you lower the rpm's, thus slowing your speed, and the torque, which can also play a part.

Just my 2 cents worth.

I don't know this for sure either, but if I understand it correctly, the engine brake is exactly that, a brake. And in slick conditions, you don't want to ride the brake, as that can cause a slip or spin out. By down shifting, you lower the rpm's, thus slowing your speed, and the torque, which can also play a part.

Just my 2 cents worth.

That's sounds more reasonable then what I put. Makes more sense too.

I don't know this for sure either, but if I understand it correctly, the engine brake is exactly that, a brake. And in slick conditions, you don't want to ride the brake, as that can cause a slip or spin out. By down shifting, you lower the rpm's, thus slowing your speed, and the torque, which can also play a part.

Just my 2 cents worth.

But a jake slows the engine not the tires.

I don't know this for sure either, but if I understand it correctly, the engine brake is exactly that, a brake. And in slick conditions, you don't want to ride the brake, as that can cause a slip or spin out. By down shifting, you lower the rpm's, thus slowing your speed, and the torque, which can also play a part.

Just my 2 cents worth.

The reason you should not use the jake in slick conditions is because it multiplies engine brake force. Take your foot off throttle at cruise speed and the truck slows a little, use the jake and it becomes more. Because the effects are instant on deceleration, if you take your foot off throttle, the response is instant and abrupt. Using lower gears is a conscience decision, and not reactive as the jakes. They also say it because downshifting with the jake on when slick is most often catastrophic. Its also easy to forget that its on. The cruise can not be set on my truck (2015 Cascadia) if the jake is on for that very reason.

I don't know this for sure either, but if I understand it correctly, the engine brake is exactly that, a brake. And in slick conditions, you don't want to ride the brake, as that can cause a slip or spin out. By down shifting, you lower the rpm's, thus slowing your speed, and the torque, which can also play a part.

Just my 2 cents worth.

The reason you should not use the jake in slick conditions is because it multiplies engine brake force. Take your foot off throttle at cruise speed and the truck slows a little, use the jake and it becomes more. Because the effects are instant on deceleration, if you take your foot off throttle, the response is instant and abrupt. Using lower gears is a conscience decision, and not reactive as the jakes. They also say it because downshifting with the jake on when slick is most often catastrophic. Its also easy to forget that its on. The cruise can not be set on my truck (2015 Cascadia) if the jake is on for that very reason.

Thanks

Personally i would not downshift in slick conditions either outside of gear recovery. In other words i would just leave in high gear when coming to a stop.

Using the foot brake is certainly the safest way to slow the truck in slick conditions. Any sudden jolt to the drive tires like a harsh downshift into the high end of the RPM range or kicking on the Jake Brakes can break the tires to break loose.

Also, on slick roads be extremely careful about using any brakes of any sort while going around a curve. Try to get down to the proper speed before entering the curve. And of course kicking on the Jakes on slick roads while in a curve is about the most dangerous thing imaginable.