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A bit of a problem here...

 
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Old 05-06-2012, 05:59 PM
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A bit of a problem here...

After using the search function, I'm still not quite able to find what I'm looking for. Hopefully someone can shed some light on this for me.

I have a 2001 base model with the less than reliable auto transmission. I recently took the car into the dealership for some work on an insurance claim after a fender bender. They assured me over and over that my transmission was not the problem. They told me that it was a "drivability problem" having to do with a sensor or a series of sensors. While the car was there they replaced the fitv and the iacv, yet my problem still persists and is getting worse.

I have been having a bit of slip between 1st and 2nd gear, and a little hesitation(not slip) between 3rd and 4th. Today I was cruising in 3rd gear(sport shift mode, so that I control when the car shifts and can let up on the gas to try and preserve life) and when I hit the brakes... Just ever so slightly touched the pedal, the car shifted down into second which put me at high rpm. This causes quite a jolt. As soon as I let off the brake pedal, it goes back into 3rd. Then as I was driving home, it was shifting up and down erratically, and then got to the point where it wouldn't shift out of second. I pulled over, let the car stop to idle, and tried to go again, and it wont shift out of second. All of this with my d4 light blinking.

I've read a bit about maybe replacing the vss, or possibly the tps sensor could help? I can't really find clear info on what the tps even is. Temperature sensor?

Also, yes I have a cel. It's the p0401 EGR code. The valve has been replaced, and the EGR ports cleaned too.

One more thing, can I scan tranny codes with my code scanner, or is there another way?

Thanks in advance.
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Old 05-06-2012, 06:04 PM
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Re: A bit of a problem here...

tps is throttle position sensor.

yhea see if you have a code 700 or 740 or something like that on those are transmission codes.
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Old 05-06-2012, 06:21 PM
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Re: A bit of a problem here...

time for a 5 speed swap
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Old 05-06-2012, 06:30 PM
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Re: A bit of a problem here...

The auto transmissions in the fifth gen preludes are crap. They all so nearly what you're experiencing. I agree with the above...do a swap.
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Old 05-06-2012, 07:05 PM
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Re: A bit of a problem here...

Using the SS mode does anything BUT preserve the transmission.


Usually a speed sensor doesn't allow it to change gears at all. When they go bad - even using SS, you cannot change gears.
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Old 05-06-2012, 07:53 PM
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Re: A bit of a problem here...

It seems like something in the TCM is bad or sensor system. I think doing a manual swap would solve that problem for cheaper. And the SS mode will not preserve your transmission at all. That means you are having user control over a more complex embedded system. It's better to stick to user full operation (manual) or electronic control system (TCM). The VSS shouldn't be the problem, and I don't know if replacing the TPS would matter. You can manually check the output of the TPS to see if it's functioning properly. If you have an oscilloscope to hook up to the output voltage, you should do that.

The brake switch is definitely connected to your TCM as well... Since these are extremely rare to fail, I'm guess your TCM isn't processing things as it should.

Last edited by Gone; 05-06-2012 at 07:56 PM.
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Old 05-06-2012, 07:58 PM
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Re: A bit of a problem here...

5th Gen Auto Transmission Failure Guide
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Old 05-06-2012, 08:10 PM
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Re: A bit of a problem here...

People around here seem to throw that 5 speed swap around like its some easy thing. I know that it would fix the problem, but the reality is, it costs as much as the car is worth aka not worth doing.

Thanks for the input. Idk what the f*ck I'm gonna do.
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Old 05-06-2012, 10:37 PM
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Re: A bit of a problem here...

Having it done by a dealer it may cost that much but doing it yourself it wouldn't be near the cost of the car, I saw several transmissions for
Maybe 500 to 750 on Craigslist in Dallas
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Old 05-06-2012, 11:09 PM
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Re: A bit of a problem here...

so youre saying that your car is only worth $800 tops?
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Old 05-07-2012, 12:15 AM
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Re: A bit of a problem here...

really its not that hard just grab up a 5 speed and now you have a weekend project. just relax and do it
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Old 05-07-2012, 12:18 AM
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Re: A bit of a problem here...

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Originally Posted by Pro19 View Post
People around here seem to throw that 5 speed swap around like its some easy thing. I know that it would fix the problem, but the reality is, it costs as much as the car is worth aka not worth doing.

Thanks for the input. Idk what the f*ck I'm gonna do.
h22 transmission

ur car is worth 350?
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Old 05-07-2012, 12:46 AM
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Re: A bit of a problem here...

Try taking off the shift solenoids and cleaning the screens. That will help but it wont solve the issue.
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Old 05-07-2012, 12:50 AM
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Re: A bit of a problem here...

You honestly cannot say "the repair costs more than the car" on any enthusiast forum, without some bagging. Your auto failure problem is an easy fix over one weekend. A rebuilt auto transmission is the same kind of money, but doesn't eliminate a future failure. If you get one from a junkyard, DON'T USE THE SHlTTRONIC feature. D only, no O/D off.

If you go five speed, it will cost more, but your car will be a million times better. People are always ready to throw in the towel on their car as soon a expensive fix comes up. Just relax and decide with clarity, not emotional. Is there anything else major wrong with the car? If not, just do the auto swap to get it back o the road, and start saving for the 5 speed.
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Old 05-07-2012, 01:19 AM
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Re: A bit of a problem here...

what he ^^^^^^said^^^^^
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Old 05-07-2012, 12:57 PM
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Re: A bit of a problem here...

If you have any mechanic friends that are willing to help you out, I suggest go with the 5spd swap. It might be easy for the rest of these guys to do the swap themselves, but not all of us are tech savy. Or like Sideswipe said, get another auto swap, save up your cash, and buy a 5spd prelude.
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Old 05-07-2012, 01:57 PM
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Re: A bit of a problem here...

Possibly could be a shift solenoid. I would recommend that you drain the trans fluid and drop the pan. Buy a new gasket (usually about $17) and take a look see if you get any chunks or shavings. If not I'd say more than likely it's a shift solenoid rather than transmission failure.

And while I agree a 5-speed swap is the most viable option if your trans is on it's way out, if you don't have the mechanical know-how I can see why this is a big deal. I did my first 5-speed swap by just jumping in, but I know my way around vehicles pretty well and it still wasn't a single day task.

Let us know what is the most viable option for you, and if you feel capable of doing the 5-speed swap yourself or you'd rely on a shop (which there is no pride hurt in saying that you can't accomplish it, a lot of people can't)
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Old 05-07-2012, 04:02 PM
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Re: A bit of a problem here...

Smok3y what you smoking?
Preludes dont have a pan to drop and change filter. No "Honda" transmission does, yes the "Honda" Pisspoor does but not a genuine honda transmission.
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Old 05-07-2012, 04:15 PM
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Re: A bit of a problem here...

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Smok3y what you smoking?
Preludes dont have a pan to drop and change filter. No "Honda" transmission does, yes the "Honda" Pisspoor does but not a genuine honda transmission.
AFAIK most manual transmissions are sealed totally while most auto transmissions have a pan. Unfortunately I've never been under an automatic prelude so again I'm just going off of an assumption. You are 100% sure there is no pan on an auto?

And I didn't say anything about changing the filter what so ever. Also moreover, all transmissions have a filter whether internal, external, able to change or not. Keep that in mind.
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Old 05-07-2012, 05:57 PM
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Re: A bit of a problem here...

tell the dealership/insurance company that your transmission is acting up ever since the fender bender and request for a new transmission under insurance claim
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Old 05-07-2012, 06:02 PM
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Re: A bit of a problem here...

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tell the dealership/insurance company that your transmission is acting up ever since the fender bender and request for a new transmission under insurance claim
Best idea so far. The only problem is, is that if the insurance diagnoses it as a problem not related to the accident you may end up paying extra in Diagnostics. Just keep that in mind. Also not sure what the scenario is with insurance agents and all but if you report an accident to your insurance BUT THEY STILL DONT REPAIR IT, it is STILL possible that they will raise your insurance premium as now they know you were in an accident.

Research and read up on that possibility. I'm not 100% sure if they will (your insurance may only go up if the claim definitely does go through) but I can't tell you one way or the other. Also if you don't have collision & comprehensive the only other way they would cover it is if you told them it was a hit and run (under the "Under insured/uninsured motorist" claims - which not all states have mandatory but a lot do, NJ & PA do I know for sure - but they may want someone's head on the chopping block and without another driver that's not possible)
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Old 05-07-2012, 06:14 PM
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Re: A bit of a problem here...

^^^^ very true and I am assuming the OP knows the whole insurance claim process and ask his insurance company what his options are before signing anything BUT if he doesnt than yes please go over your coverage handbook.
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