AcuraTL-X

Hey guys, new to Azine but i've been around lurking in the posts for awhile

Anyway, what i wanted to ask was if using sportshift, changing gears below 2k rpm or at 2k rpm wll cause future trouble to my transmission. The reason why i was worried because my brother owns a 2004 G35 6MT and he changes his gears every 2k rpm and his clutch always goes out wayyyy before his time. He finally realized this and started to shift later (babies his car tooo much )

So, i since our 5at cars doesent have a clutch, i was wondering if my transmission would cause problems if i shirt every 2k rpm instead of the normal 2500 or even 3000 rpm.

Thanks pplz

justnspace

iTrader: (1)

your brothers clutch goes out, NOT BECAUSE HE's SHIFTING AT 2K, its because he doesnt know how to properly use the clutch.
he's either slipping the clutch, riding the clutch, abusing the clutch, etc.

EvilVirus

iTrader: (8)

^ agree plus there are other factors to be consider

Otacon

iTrader: (1)

Shift at redline. That's why it's there, right?

AcuraTL-X

normally i would agree with otacon but unfortunatly my gas bill doesen't agree with me

also i showed him this thread, and he denies all of these claims but idk apparently he figured out he wasen't downshifting enough. i.e going 20mph in 6th gear

Otacon

iTrader: (1)

True that, I usually shift at around 2.5-3k but with my jpipe and MM delete it gives a nice purr at 3500 so there's times where I shift late to get that sound.

justnspace

iTrader: (1)

that will cause the engine to lug.
but will not destroy the clutch.
your brother needs to learn how to drive a clutch properly.

geekybiker

Just tooling around town I shift ~4k while accelerating from lights, etc. Under 3k on the highway though. I tend to keep it just over 2k while moving.

AcuraTL-X

i shift at 2k from 1 & 2 gears but i have to go up to about 2500 rpm in 3rd because if i shift any lower the car shudders, but apparently this is common among 04 tl's. but, i should probably start shifting at 2500-3k rpm because i dont want any sportshift or transmission issues. After i get my tsudo cat, im sure i will start to care less and less about my mpg anyway

truonghthe

I am shifting around 3000 RPM and if I am on ram to the highway then may be 4 or 4.5k rpm. Some one else already ask this question and I believe the response was our TL has peak TQ at high rpm (which is true at 5500 rpm) if you shift under 2k rpm it cause your AT alot of slipping and that putting stress on the TQ converter (some one correct me if I am wrong on this).

djDANNY

I don't have an AT but I'm pretty sure Acura would have programmed it in to not let you shift at unsafe times (i.e. it won't let you "moneyshift" you try to downshift it if that gear would put you past the redline and it won't let you shift up if the next gear puts you at a rpm that wouldn't work for the engine). At least those are the safeties that I would build in if I designed it... so I'm pretty sure you won't really be hurting your car by telling it to shift at 2K rpm.

Also agree with what the other posters are saying about how your brother isn't driving his manual correctly. Clutch wear has nothing to do with when you shift, it's all about how you shift (and launch from a stop). Just google how a clutch works and you'll see why.

vietxquangstah

iTrader: (7)

This is off topic, but have you ever done any runs against your brother in his G? How many car lengths does he usually beat you by?

justnspace

iTrader: (1)

I agree with the watchdogs in place.
if you're lugging the engine, I automatically assume that the trans will up shift into the correct RPM range.
any auto's can confirm this?

AcuraTL-X

@vietxquangstah no i havent raced him yet, mostly because he babies his car and laughs everytime i even bring it up. but im sure its by a considerable amount because him in his 6th gear pulls very hard than just my 5th gear (obv). but atleast i do better highway mpg than him thumbsup:

AcuraTL-X

anyway, i ask this again because i feel my transmission is kind of rough when i shift at 2k in SS than just the car in its automatic mode. but maybe its nothing?

MonkeyTrucker

Press the gas and rev up before shifting ... it's feels "ruff" because your shifting down when the RPMs are low and the car isn't expecting it.

Before I shift to 3rd from 4th going 70+ miles per hour, it's as smooth as can be because I set-up higher RPMs before shifting.

Bearcat94

Recommended shift points and built in limits found here:

J-020: 3G TL Owners Manual, Navi Manuals & Warranty Booklet Links
https://acurazine.com/forums/3g-tl-2004-2008-93/j-020-3g-acura-tl-owners-manual-navi-manual-warranty-booklet-pdfs-851625/



OP - why are you doing this again? To save gas? If so, just put it in 'D', since it's more consistent, it'll be most fuel efficient.

I hate cars

The torque converter stall speed is around 2,000rpm. You can shift to 5th at 20mph and give it some throttle and it will go up to 2,000rpm. Upshifting early with a large difference in output and input speeds will cause a lot of heat in the transmission from converter slippage. The safeguards will allow you to upshift early because it doesn't hurt anything right away but if you upshift early enough and do it often enough you will overheat the trans. When the torque convertor locks, slipping ceases, efficiency improves, and heat goes way down. Upshifting too soon will not allow the converter to lock or it will bog or kill the engine so you're always slipping, creating excess heat, and killing efficiency.

Upshifting too early will not improve gas mileage as people seem to imply. All you're doing is losing the engine's mechanical leverage against the wheels by going to a higher gear. You're creating unnecessary work for the engine. You get lots of heat, worse gas mileage and less power. If you pay close attention you'll see the point where input shaft speed and output shaft speed match. The rpms go from holding steady to climbing. Sometimes they begin climbing and if you watch closely they will slightly drop just a little as the clutch locks. Once they begin climbing, the converter is efficient and slipping is minimal or non existent if the clutch locks. You should allow it to pick up to about 2,500 rpm if mpg is what you're after. Shifting very early to hold rpms down to 2,000 has no positives.

It sounds like this transmission in particular might need the pressure switches replaced and the fluid changed. Shudder is not normal, it will result in trans failure if you let it go on. Shudder is slip.

MEKO

iTrader: (1)

It's called sportshift, hit the redline... otherwise keep it on D
Like Bearcat said... better for MPG

..assuming you are trying to shift at low to save gas...so keep it at D

AcuraTLXIV

like i hate cars said above, shifting at 2k does not give you better mpg. The con's outweigh more than the pro's.

MrJimmy

D if you're goal is mpg. Otherwise, go into SS if you feel like going on a spirited drive. Hence, "sport" shift. Good luck

GKinColo08TL

I have been driving MT cars for 40+ years and can't remember someoe wanting to know at what intervals to shift...just drive the car, shifting at the correct time comes naturally.

4drviper

slap shift at 1800 and it'll actually shift around 2k.

but then again i have trans cooler.

ramway

Whenever I break at top speed, my Acura TL 2005 vibrates and shakes. What seems to be the problem?

MEKO

iTrader: (1)

^
Do you shift at 2k instead of normal rpms?
Hope your transmission didn't cause that

May be rotars

I hate cars

You might want to start a thread with your issue. Probably rotors but definitely not transmission or sport shift related.