Any software upgrade for paddle shift in D?
Thread Starter
Lexus Test Driver
Joined: Mar 2008
Posts: 9,992
Likes: 246
From: California
Brakes are a lot cheaper to replace than engines and transmissions.
Well, ok, slamming into a stationary object is the WORST possible way to slow down your car. Your method is #2.
Thread Starter
Lexus Test Driver
Joined: Mar 2008
Posts: 9,992
Likes: 246
From: California
Old myth. No longer the case with modern cars. No evidence of failed transmissions due to regular downshifting.
^^^ if it so bad, I'm sure Lexus thought about it, when they programmed power mode to downshift significantly more than normal.
I personally don't see anything wrong with downshifting and braking at the same time.
But that's just my opinion.
I personally don't see anything wrong with downshifting and braking at the same time.
But that's just my opinion.
I think the "Key" Question here is.
A) first is this possible (I suppose anything is possible)
B) Is the ISx50 transmission capable of performing anywhere near IS-F transmission timing (while using the shifters / not auto)?
A) first is this possible (I suppose anything is possible)
B) Is the ISx50 transmission capable of performing anywhere near IS-F transmission timing (while using the shifters / not auto)?
There's a few long threads about it that explain in detail why it's not only bad for the transmission, it's worse for the engine. Even on a "modern" car. (and to be clear we're discussing engine braking, not just "downshifting" for performance purposes)
Here's one of em:
https://www.clublexus.com/forums/is-...slow-down.html
Quite a few posts point out it's drawbacks but this is probably the most technically detailed one-
https://www.clublexus.com/forums/2719075-post24.html
Braking and downshifting isn't bad per se. Downshifting instead of braking is bad. It sucks oil up past the rings, puts unnecessary high tensile loads on the rods, wears the clutch harder, or in the case of an automatic, unnecessarily raises the fluid temperature and stresses the Sprague clutches unnecessarily.
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Thread Starter
Lexus Test Driver
Joined: Mar 2008
Posts: 9,992
Likes: 246
From: California
It's really not.
There's a few long threads about it that explain in detail why it's not only bad for the transmission, it's worse for the engine. Even on a "modern" car. (and to be clear we're discussing engine braking, not just "downshifting" for performance purposes)
Here's one of em:
https://www.clublexus.com/forums/is-...slow-down.html
Quite a few posts point out it's drawbacks but this is probably the most technically detailed one-
https://www.clublexus.com/forums/2719075-post24.html
There's a few long threads about it that explain in detail why it's not only bad for the transmission, it's worse for the engine. Even on a "modern" car. (and to be clear we're discussing engine braking, not just "downshifting" for performance purposes)
Here's one of em:
https://www.clublexus.com/forums/is-...slow-down.html
Quite a few posts point out it's drawbacks but this is probably the most technically detailed one-
https://www.clublexus.com/forums/2719075-post24.html
Lastly, if it was that bad to do, I don't think Lexus would not allow this feature in it's cars in the first place. Heck, no manufacturer would.
When i complained to my dealership about my dusty brakes... they told me when I need to slow down, use the paddles to downshift.
Im sure if it was bad.... Lexus would not give us this feature in the first place ...
Im sure if it was bad.... Lexus would not give us this feature in the first place ...
Good links there, but again, there is zero proof of actual transmission failures linked to downshifting. All of it is assumption, hearsay, and opinion. In the end, there is still no hard evidence showing downshifting, combined with regular braking causes problems. This is also the case if you look at a Consumer Reports book showing longterm transmission reliability for Tiptronic-equipped cars.
Lastly, if it was that bad to do, I don't think Lexus would not allow this feature in it's cars in the first place. Heck, no manufacturer would.
Lastly, if it was that bad to do, I don't think Lexus would not allow this feature in it's cars in the first place. Heck, no manufacturer would.
That sounds more like a assumption than a proven fact..
But anyway, given nobody can reprogram the ECU in the first place I'm gonna go with "no" to the original posters question.