diesel_s

I dropped my changed my cv axle a few days ago and the same day I finished, I took it out for a test drive and I used to be able to top 2nd gear at 70 now it's topping at 55, the car is smooth when driving normal but driving it hard, it tops low in every gear. I took it too Acura yesterday because the power steering pump they installed two years ago started leaking and they replaced it then told me I need two motor mounts now , gonna get to fixing that soon but I think my cars in safety mode, how do I get it out?

Royik1157

ya my mounts are blown too, and my car feels really sluggish in every gear. i also had my axles replaced recently. im going to change my mounts this week so ill let you know if the vibration. also if i give it gas sometime my traction light comes on and my car vibrates like crazy. hopefully new mounts will fix everything.....

Turbonut

iTrader: (1)

Guess you can disconnect the battery and wait several minutes, but make certain you have the radio/nav code.

I hate cars

The axle obviously can't affect what speed it does in what gear, that's determined by gear ratio, nothing more.

If you mean short shifting, not sure how an axle could affect what rpm it shifts at. Have you tried manually shifting? Did you disconnect the battery at any point?

diesel_s

I normally drive it in manual mode and thats how I discovered the issue after I changed the axle, but I disconnected the battery yesterday for a few hours so I'll see if that helped at all today. If that is the problem, could it be because I just need to replace those mounts? I've looked up trans problems and I'm not getting any of the symptoms I've seen or read about from others.

diesel_s

Yeah I get my traction control light coming on sometimes of I floor it, but I normally cut off my traction control when I drive lol

I hate cars

Are you saying at redline, the car is going slower in each gear? That's impossible so if that's the case I would look more toward speedo error. I thought originally it was short shifting.

diesel_s

Yeah that's exactly what I'm saying, the car used to do 70 in 2nd and up to 115 in 3rd, now it's saying 55-60 in 2nd and 85 in 3rd...I figured speedo but I happened to pass one of those radar sign. That's shows your speed and my dash said 40, and so did the sign

diesel_s

O yeah disconnecting the battery did absolutely nothing lol, while I'm at it, I'm doing a tune-up in a few days, what spark plugs do u guys suggest?

I hate cars

I don't want to insult you but maybe your pre-axle memory is wrong. Speed in each gear is determined purely by gear ratio. The engine is mechanically linked to the tires and nothing can change that. Engine tune, power, etc makes no difference in what speed it will do in each gear.

The only exception would be a slipping transmission but you would have a failure by now if that were the issue. Torque converter and torque converter lockup is the only other factor. If by some chance the converter was locking at full throttle before and somehow not locking now would be the only possible explanation. Most cars do not lock the converter at full throttle and I really doubt the TL does but once in a while you get an oddball.

paperboy42190

iTrader: (7)

No way the 3rd gear goes to 115.... It's about 100 for me

Turbonut

iTrader: (1)

Doing the calculations, it looks as though the engine rpm is maxing out at @5000 rpm, as both 2nd at 55mph, and 3rd at 85 mph, is in the 5000/5200 rpm range.

Next time look at the tachometer rather than the speedometer to double check.

greenmagnon

Just a reference point: my 2005 TL reliably shifts from second gear to third gear at roughly 70 mph. Ballparking my glances at the tach makes me recall that shift occurring around 6250-6750 rpm.

I spend a lot more time watching the road at that point - not my gauges.

Turbonut

iTrader: (1)

That's why they make shift lights. They are worth their weight in gold, at least for me, but not in the TL though.

Lack of higher RPM's:
Maybe the V Tech is kaput.

I hate cars

Those darn rotaries. I need the tach to shift in daily driving. I can't tell a difference in sound from 1,000rpm to 7,000rpm.

Turbonut

iTrader: (1)

Sorry off subject, but Matt you're right about the rotary. Usually one can detect the sweet spot with a piston engine when it gets to the upper rpm range, but that rotary would go forever. My cousin had a little 12A that he took to 12,000. Thank goodness that my car came with a warning buzzer at 7k, but need to shift it at 6400, so the light does its job. First gear needs to be shifted at @ 33 mph (6400) and that certainly arrives in a hurry.

Royik1157

so im not the only one haha. i did change my mounts though and its alot better no vibrations when driving, but today i just got the same traction light on and its still sluggish like i took it to the top of second at 70mph but its alot slower than i remember it to be. this is driving me crazy im not sure if i need to replace my tranny or what??? im going to see if it may be the transmission mounts... worth a try.

diesel_s

My TL has always done up to 70 in 2nd and 115 in 3rd with no problem from the day i got it brand new March of 2006. After I changed the problem axle, it just wont go past 55 in 2nd and 85 in 3rd...now that i changed the side mount, it goes up to 60 in 2nd and 85 in 3rd....today i'm changing the front mount, going to look into doing the transmission mounts and the rear mount within the coming week.

diesel_s

My preaxle memory is spot on, its acting completely different but i believe the issue is the motor mounts at this point and i believe the angle at which I had the vehicle pitched when i did the axle and the fact i left it in that position ovenight is another factor to that problem....today i do my front mount, tomorrow the trans mounts and next week the rear mount.....I need to do a new front bumper too lol, semi tire blew out in front of me and killed my bumper

ez12a

I dont think that's right... your mount should have no affect on the speed one can go in a given gear..certainly not the 30mph difference you're experiencing at 3rd.

maybe your trans is slipping?

I hate cars

You realize, that's completely impossible, right?

diesel_s

I realize that isn't impossible, why would I boast random numbers on a car I've owned and driven hard since the day it was purchased March of 2006 brand new. Maybe I happened to buy the oddball but if u look up at early post apparently I'm not the only one that was able to achieve such numbers in each gear.

diesel_s

A slipping tranny crossed my mind yesterday. It's now stopping at 61 in 2nd and 88 in 3rd. I don't get why it's acting up but I will say it has done something I've never experienced. In the automatic, when I drive it in manual mode and no matter how hard u floor it the car shifts from 1st to 2nd for you (a feature I hate) but right now if I punch it in first, instead of going to 2nd, it'll get hung up until I let off the gas

I hate cars

Explain how a bad motor mount changes the speed you can go in each gear... I would love to hear it.

If you are manually taking it to the revlimiter in each gear to get these numbers which is the only way to accurately get these numbers, the only factors are a lower redline or slipping trans period.

diesel_s

In every forum there's always on guy that's gotta be a butt....All I did was post up how my car began to act after I changed the axle, what I stated before is what happened. I don't know how it affects the speed but I do know inmate have the odd ball of the bunch.

The problem obviously seems to be a combination of many things now that I've gotten deeper into the issue. Changed some mounts and it's running better. Maybe I have a slipping tranny, maybe I have a lowered redline idk, but when I figure it out you will be the first to know. Those numbers I was getting stopped right at the redline , never went beyond 6800 rpm to get those numbers in 2nd and in 3rd idk where it stopped as far as RPMs go but when I'm back to normal you'll know

pohljm

He is not being a butt. It truly is an impossibility to change the ratios from what you have done. You really need to post not only MPH numbers, but MPH relative to RPM and in what gear. we are missing parts of the equation. The only sound explanation at this point is a slipping tranny. There is no way this can be an "oddball" situation. the gear ratios have not magically changed.

IHC's rational and comments are completely sound.

diesel_s

I understand what you guys are trying to say, all I'm saying is the problem started after my axle change and it wasn't like it was a building problem. The day before and the day of I hit my top speeds in those gears messing with my little bro, running his 350Z... I attempted it 45 min ago and it stopped at 5000 rpm doing 57-58mph....looks like my rev limit has somehow been lowered.

diesel_s

I know this is a completely different matter but it just started today after I got my TL back from the dealer for power steering pump number 4......that's right, number 4.....im only letting them change then because they're under warranty. Anyhow, I cut my lights on, my front parking lights r out along with the side markers but the rear lights work and all 4 turn signals are working properly....gonna try and trouble shoot it t