engine brake

[pullagnm]

After reading the manual for my 08 SR5 V6 I was wondering about what it referred to as "engine brake". It's basically down sifting. Does anybody use there 4R like this? And why would they refer to it as "engine brake" instead of "down sifting"? Is there something special with the 4R's that allows you down sift for breaking?

 

[galactic_04]

engine braking is something you generally hear about more in a manual transmission. It's useful, but mainly when in the mountains as you don't want to overheat the brakes with so many hills, so you can leave it in 3 instead of drive and it'll do some of the braking for you so you don't have to use brakes so much. Around town it's really not that useful in daily driving.

 

[T4RBoarder]

Well I know on my 4th gens when I'm going down a steep hill the transmission will down shift and do a little engine braking, my older t4r did not do this or any other off my vehicles and I think it's kinda cool

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[M1911]

Well I know on my 4th gens when I'm going down a steep hill the transmission will down shift and do a little engine braking, my older t4r did not do this or any other off my vehicles and I think it's kinda cool

It's called grade logic, and it is in most automatic transmissions these days.

 

[T4RBoarder]

Never had one do it down hill, had hondas that would hold third forever but never noticed it on a yota or my subaru

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[00328]

Well I know on my 4th gens when I'm going down a steep hill the transmission will down shift and do a little engine braking, my older t4r did not do this or any other off my vehicles and I think it's kinda cool
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Have also felt the tranny downsift in my "05 V8 going down a hill. Was surprised the first couple times I noticed it. Kinda cool.

 

[pullagnm]

Thanks for the info. This helps me understand why they refer to it as "engine brake".

 

[tictoc]

Thanks for the info. This helps me understand why they refer to it as "engine brake".

It is also some times called compression breaking. It uses the engine's compression to slow the rotation of the transmission thus slowing the wheels and the vehicle. You may from time to time see sighs that say "compression braking prohibited". This is meant for semi trucks using their jake brake or downshifting. I use downshifting all the time in town. But that is because I drive my automatics like a stick. Helps allot with cornering and settling the chaise imo. Plus, it wears less on the breaks.

 

[pullagnm]

It is also some times called compression breaking. It uses the engine's compression to slow the rotation of the transmission thus slowing the wheels and the vehicle. You may from time to time see sighs that say "compression braking prohibited". This is meant for semi trucks using their jake brake or downshifting. I use downshifting all the time in town. But that is because I drive my automatics like a stick. Helps allot with cornering and settling the chaise imo. Plus, it wears less on the breaks.

Does it effect your transmission any? and what is "settling the chaise"?

Thanks

 

[tictoc]

Does it effect your transmission any? and what is "settling the chaise"?

Thanks

I have never seen any negative effects from it on any transmission . And that would be my poor spelling. It was supposed to be chassis. :keyboard::sobbing:

 

[Burt]

My '08 V6 4WD downshifts when going down a single lane, winding 8% grade on my daily work commute. I really like this, as no braking is required and a constant 35mph is maintained.