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car help: transmission slipping?!

rh71

rh71

No Lifer
What does it feel like if a transmission is slipping? If I am un-able to red-line the RPMs (it struggles to get over 2500RPM), WHILE in PARK, can it still be a transmission problem? It waivers at 2500 and can't get over, no matter what. Is the transmission involved in this ? Shift cable? O2 sensor ?
 
what the hell does the transmision have to do with engine RPMs? If anything, a slipping transmission would make it rev faster.
 
when u blance out, the car doenst want to move as well as it did before...

this is most apparent when u are on an uphill.

if you are not engaged and the engine wont rev...u have other problems...

just try doing the basics... check ur fluids, oil, etc...
 
The reason I'm asking is... despite me telling them that the car isn't getting past 2500RPM while in PARK, they're telling me I need a new transmission because it's slipping. While in Drive, it stutters trying to get to 2nd gear and usually doesn't make it. That's probably what led them to tell me it's a tranny problem... but I'm asking about the PARK thing to prove it's not a tranny problem if it's already struggling then.

His response to my question was that the car may not know it was in Park, that's why it could still have been struggling/tranny slipping. I can't believe all this BS they're putting me through. I'm paying them $79 to do this diagnosis... this is the Honda dealer now. After the independent shop was unable to diagnose my problem also...

This is pretty much a follow up to what's been going on here. It's a '90 Accord.
 
What happens if you rev it in neutral?

On a related note: It seems that most drivers of automatics have no idea what the little "N" on the shifter is for.
 
Originally posted by: Tyler
What happens if you rev it in neutral?

On a related note: It seems that most drivers of automatics have no idea what the little "N" on the shifter is for.
Click to expand...
I wish I had tried revving in Neutral before I gave it to the dealer to diagnose. I had only done it in PARK because I was pulled over at that point anyway.

I've been driving since I was 15 (now 10 years later), and all automatics. I don't know what neutral is for other than if I needed to move the car physically without it being in gear and thus preventing me from doing so.

Please tell me in either case... what if I were and weren't able to rev past 2500 in Neutral also ?

 
There is a possibility that the neutral safety switch is not working properly, and it's making the computer think that it is in park all the time. That would be a problem with the neutral safety switch, (Or the associated linkages) and not a problem with the transmission...
 
My 92 accord doesn't have a rev limiter in park...at least not up to around 3500rpm....



If your engine isn't getting past 2500rpm, that could cause the feeling that your transmission isn't working properly. Mine likes to shift around 3000 rpm, although yours should get into second eventually unless it thinks you're jamming down on the gas trying to accelerate...
 
hm .... I don't think you will know just from posting here, you would probably need to go to a mechanic to know the real reason.
 
The catch of it is... one of the first guys to answer the phone at the dealer... before we dropped it off... he said his Pontiac reacted the same way... it wouldn't shift into 2nd and he smelled fresh gas and the car wasn't as fuel effecient. We have those same symptoms. He said it was a spark plug misfire and that fixed it for him. An O2 sensor may also be the culprit - we'll definitely have to fix that since the check engine light is on for that...

Turns out he's not a mechanic nor a manager at the Honda dealer so he can't really do anything about it. I had to literally argue with the manager to get them to even CHECK the fuel pressure and spark plugs.. which they're supposedly doing right now.

Let me ask you now... misfiring spark plugs, bad O2 sensor... these are all possible causes for this acceleration problem, are they not ?
 
Originally posted by: Synergy
hm .... I don't think you will know just from posting here, you would probably need to go to a mechanic to know the real reason.
Click to expand...
This is the 2nd group of guys to look at it. Independent shop told us to change the fuel filter. Since we hadn't had a tune-up in a while, we willfully opted for them to do a complete tune-up (new plugs/wires, etc.) along with it. Problem came back after 2 weeks of normal driving.

Now to the Honda Dealer because we had more confidence in them being able to resolve this problem (along with $79 diagnosis fee) the first time around... they keep saying tranny problem... that's where we are now...

 
sounds like it may be a fuel/air problems....:\ if you can't get it that high in park(this is ignoring the fact that you might hav ea rev limiter in parK) since it's not as efficient as you go up in RPMs i think the reason my car had a HUGE loss of power was the carbourator..very low quality one....and i think i had a fuel leak(you may remember me reporting my car blowing up back in jan) but ever since i replaced the carborator, i had a lack of power.......due to the fuel/air mixture........maybe check into that

i'm no mechanic, just throwing ideas out from my experience
good luck!
 
In neutral, there is no gear engaged so if you can't rev it past 2500 in neutral it probably means you're not having a transmission problem.
I don't know this for a fact but it seems logical. This is of course based on whether or not it's true that in neutral, there is no gear engaged.
 
Lack of fuel or plugged exhaust is where I would start. Check your fuel pressure, filter, pump operation, and injectors (if it's FI'ed). After that, make sure it's getting good air, clean filter, intake sensors are ok, then check the exhaust and Oxygen sensors. After you eliminate a motor problem, then check the transmission.

Engines are rather simple, all they need is fuel, air, and spark to run. Just work your way through and you'll find the problem.
 
While it almost certainly sounds like an engine problem, it may be worth testing the transmission. This is easily done.

Put the car in Drive. With the handbrake firmly applied and one foot firmly on the brake, depress the accelerator to the floor - FOR NO MORE THAN 5 SECONDS.

The engine should rev to about 2000-2500. Less than this indicates that the engine is weak. More than this indicates that the transmission is slipping.
 
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