[turnsignalslol]

I was having some fun with the car earlier and was downshifting to like 6k even in first. How bad is this for the car? I have 1450 miles on the dash.

[Say Chi Sin Lo]

More or less a non-issue if you rev-matched it properly and everything up to operating temperature.

[turnsignalslol]

Originally Posted by Say Chi Sin Lo

More or less a non-issue if you rev-matched it properly and everything up to operating temperature.

i have a zf8

[Say Chi Sin Lo]

Originally Posted by turnsignalslol

i have a zf8

I don't drive an automatic, so I may not know what I'm talking about, but I'm sure if the computer doesn't think it's safe for you to downshift, it wouldn't select the lower gear for you.

So as long as the car was up to operating temperature, I think it's a non-issue.

[WhiteRqbbit]

Probably not bad, but why into 1st gear? I don't even downshift from 2nd; I just let the car do it for me.

[RockCrusher]

Originally Posted by turnsignalslol

I was having some fun with the car earlier and was downshifting to like 6k even in first. How bad is this for the car? I have 1450 miles on the dash.

I note in a later post you have an automatic transmission.

While the automatic will I believe rev match that's a bit harsh treatment of the automatic and engine.

And for what reason?

Going into 1st from 2nd with the RPMs then at 6K means you only have 1000+ RPMs before you need to up shift back to 2nd before hitting the rev limiter. I can't believe 2nd gear would have not sufficed under the circumstances which had you downshifting to 1st.

No M2 automatic experience but with say my Hellcat and its A8 transmission I never downshifted to 1st from 2nd with the resulting RPMs in 1st being 6K (or given the red line of the engine was 6K even 5K).

In fact I can't recall ever downshifting any automatic equipped vehicle into 1st gear which resulted in such a high RPMs.

As an aside years ago I was cautioned by techs to avoid high RPMs (>4K) under closed throttle. What I was told was the pistons do not have compression/combustion pressure to help center the piston in the bore. This can lead to excessive ring/piston wear. (It can also increase oil consumption.)

So I avoid downshifting any engine (mated to a manual or automatic transmission) that will have engine RPMs above 4K and with a closed throttle. IOWs I don't down shift to slow the car with engine braking if the downshift has RPMs above 4K.

An upshift at RPMs above 4K should subject the engine to much less wear and tear because engine RPMs fall some and after the shift is made most often one immediately applies the throttle. The engine spends very little time under closed throttle with the engine spinning >4K RPMs.

[JABCAT]

That's a good way to cause damage to components. There's absolutely no reason to downshift to 1st at 6k rpms.

[c1pher]

I don't think it's an issue, computer should deny any out of range requests.

[akumachu]

^^^ agree. Computer won't down shift if it is going to money shift.
Electronic nanny doing exactly what it suppose to, making sure our babies don't get hurt.

[turnsignalslol]

Originally Posted by JABCAT

That's a good way to cause damage to components. There's absolutely no reason to downshift to 1st at 6k rpms.

Originally Posted by RockCrusher

I note in a later post you have an automatic transmission.

While the automatic will I believe rev match that's a bit harsh treatment of the automatic and engine.

And for what reason?

Going into 1st from 2nd with the RPMs then at 6K means you only have 1000+ RPMs before you need to up shift back to 2nd before hitting the rev limiter. I can't believe 2nd gear would have not sufficed under the circumstances which had you downshifting to 1st.

No M2 automatic experience but with say my Hellcat and its A8 transmission I never downshifted to 1st from 2nd with the resulting RPMs in 1st being 6K (or given the red line of the engine was 6K even 5K).

In fact I can't recall ever downshifting any automatic equipped vehicle into 1st gear which resulted in such a high RPMs.

As an aside years ago I was cautioned by techs to avoid high RPMs (>4K) under closed throttle. What I was told was the pistons do not have compression/combustion pressure to help center the piston in the bore. This can lead to excessive ring/piston wear. (It can also increase oil consumption.)

So I avoid downshifting any engine (mated to a manual or automatic transmission) that will have engine RPMs above 4K and with a closed throttle. IOWs I don't down shift to slow the car with engine braking if the downshift has RPMs above 4K.

An upshift at RPMs above 4K should subject the engine to much less wear and tear because engine RPMs fall some and after the shift is made most often one immediately applies the throttle. The engine spends very little time under closed throttle with the engine [...]

I let a friend drive my car with me in the passenger seat and he started doing this shit a total of two times. Was not happy and got worried hence why I posted

[turnsignalslol]

Originally Posted by JABCAT

That's a good way to cause damage to components. There's absolutely no reason to downshift to 1st at 6k rpms.

Yeah I let a friend drive my car and he started going crazy which got me very worried. Lesson learned, definitely had me sweating the entire night 😭

Do you think I may suffer serious consequences in terms of the car longevity due to this? The car was being pushed pretty hard last night while engine was warm but definitely nothing as crazy as when my friend was driving. This has me worried sick

[Tag]

Nothing to worry about, AT is idiot friend proof. Hopefully your car was already broken in.

[turnsignalslol]

Originally Posted by turnsignalslol

I let a friend drive my car with me in the passenger seat and he started doing this shit a total of two times. Was not happy and got worried hence why I posted

Originally Posted by turnsignalslol

Yeah I let a friend drive my car and he started going crazy which got me very worried. Lesson learned, definitely had me sweating the entire night 😭

Originally Posted by Tag

Nothing to worry about, AT is idiot friend proof. Hopefully your car was already broken in.

Yeah I did my break in service at 1140 miles. Some people said I should ramp up how much I beat on the car up to 3k miles but I guess that just flew out the window 🫠

[RockCrusher]

Originally Posted by turnsignalslol

Yeah I let a friend drive my car and he started going crazy which got me very worried. Lesson learned, definitely had me sweating the entire night 😭

Do you think I may suffer serious consequences in terms of the car longevity due to this? The car was being pushed pretty hard last night while engine was warm but definitely nothing as crazy as when my friend was driving. This has me worried sick

That's why I don't let "friends" drive my cars.

And while I never would treat a friend's car badly I don't drive the cars of friends (or family except under special circumstances).

Unfortunate your friend took advantage of you but the engine's fine.

[turnsignalslol]

Originally Posted by RockCrusher

That's why I don't let "friends" drive my cars.

And while I never would treat a friend's car badly I don't drive the cars of friends (or family except under special circumstances).

Unfortunate your friend took advantage of you but the engine's fine.

Yeah, once again, lesson learned. Everyone else who I let drive my cars would treat it with respect and like they were going to be the next owner, while this guy literally gave 0 fucks. I love my friend but bro has to relax in other people’s cars. He drives even crazier in his own car so yeah 💀 Safe to say he isn’t driving my cars in the future again and I probably won’t let anyone else drive it ever.

Would you say there’s a very good chance that nothing was excessively damaged? Just worried about any driveline shock or damage to the engine or transmission.

[M2siast]

Originally Posted by Tag

Nothing to worry about, AT is idiot friend proof. Hopefully your car was already broken in.

This. End thread.

[MT6]

You are past break in play as you want if it’s an MT I suggest using the Gear shift assistant aka Synchro Rev match

AT is non issue

[turnsignalslol]

Originally Posted by M2siast

This. End thread.

Okay cool thanks, I’m the type of person to get paranoid over everything 😭

[M2siast]

Originally Posted by turnsignalslol

Okay cool thanks, I’m the type of person to get paranoid over everything 😭

I know the feeling! But this is a non issue, if you were over break in and the car was up to temp. Don’t baby it too much!

[John Tanglewoo]

Originally Posted by turnsignalslol

I was having some fun with the car earlier and was downshifting to like 6k even in first. How bad is this for the car? I have 1450 miles on the dash.

Having some fun is cool, but with 1450 miles, you're still in the gentle phase. Downshifting at 6k in first occasionally is okay, but it's like introducing your car to the gym gradually. Just keep it varied until you hit the recommended break-in miles.

[izzyM2]

This is what happens when auto drivers want to imagine they are driving a manual... confusion takes place!
As long as you are not redlining it you good. If you are not sure just let the nanny drive for you (as it is meant to) hopefully you will still feel engaged.

[Bumpinjeep]

Originally Posted by turnsignalslol

I was having some fun with the car earlier and was downshifting to like 6k even in first. How bad is this for the car? I have 1450 miles on the dash.

Literally a non-issue. The car is not damaged in any way shape or form. The transmission wont shift if it thinks that the car will be damaged. Calm down, there's literally zero chances that anything is broken or damaged. This isn't a manual where you are the computer, you're sort of removed from all of that. Enjoy your car.