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Discussion Starter · #1 ·
hi, new to forum and volvo ownership. we have 2 small kids and wanted a volvo. bought a 98 xc70 about 3 weeks ago and have had nothing but trouble. some history - 130000 miles, good engine, previous owner replaced original transmission with one from a salvage yard. drove fine apart from abs tracs lights. removed abs module and sent it off to vic rocha.<br>3 days ago i was driving like an old man (like i usually do) and the flashing arrow came on. car would not change gears and was stuck in 3rd(?). when the engine was cold the next morning, i took it to local volvo indy for transmission flush. light was still on but went into 1, 2 and 3 but no 4. after it was warmed up and i slowed to a stop, pulled away in 3rd only, again. indy flushed transmission and the arrow went (old fluid was black). drove away, happy. 2 miles and i t was back and in limp mode. indy pulled the codes and they came back as '3rd gear incorrect ratio' and on of '4th gear incorrect ratio'.<br>cleared the codes but they came back. would not go into 4th, even on highway.<br>if this is transmission failure, shouldn't it be rather gradual. granted i have only had the car a few weeks but up until now it has changed gears like a knife through butter.<br>secondly, is there any chance that this is the pnp switch; bear in mind there were no pnp codes.<br>put the fixed abs module in hoping that it may be a speed sensor-communication thing with the abs. abs module works now (thanks vic) but still have the arrow and limp mode.<br>do i need a new transmission? i welcome all comments (if you reply 'need a new tranny' please tell me your experiences).<br>thanks and regards
 

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Did your indy mechanic not get codes from your car? He should have used a code reader to narrow down the issue. I suspect a position sensor (and not your tranny, from your discription) but won't know without codes.
 

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Discussion Starter · #3 ·
Re: (MadeInJapan)

hi, yes. there were 2 codes, i <I>think</I> they were 0322 and 0325? anyway, the numerics translated to '3rd gear incorrect ratio' and '4th gear incorrect ratio'.<br>any ideas? by the way, what is the position sensor, where is it and how do i fix it?! thanks
 

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First, let's confirm you have the right trouble codes. Here's what I get with your numbers:<br>P0322= Ignition/Distributor Engine Speed Input Circuit No Signal <br>P0325= Knock Sensor 1 Circuit Malfunction (Bank I or Single Sensor)<p>3rd and 4th gear incorrect ratio are P0733 and P0734.<p>If your description (and not the codes you gave me) is correct, I would suspect a bad PNP switch. If that's not it, then a TPS (throttle position sensor). Here is a write up on the PNP switch replacement: <A HREF="http://volvospeed.com/Repair/pnpswitch.php" TARGET="_blank">http://volvospeed.com/Repair/pnpswitch.php</A><p>Alternatively, and first, you can push the shift over-ride button and move the gear shift quickly about 20 times (engine off) between Drive and low gear- rocking it back and forth. This might clean the contacts in the shift lever enough that it will work again- at least for awhile. <p>After doing the above, reset the codes and see if it has fixed it. <br>I hope this is all that's wrong with your car. <BR><BR>
<i>Modified by MadeInJapan at 11:22 PM 8-12-2006</i>
 

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Discussion Starter · #5 ·
thanks for the input. i have the numbers wrong, i guess searching through the forums burned those numbers into my brain for some reason. anyway, the description i gave is correct for the codes that were pulled.<br>there were no codes that mentioned the pnp, 'though this is not definitive of course.<br>i have tried the shift operation to clean the contacts. did not work for me.<br>i will try the pnp and look into the tps.<br>you are suggesting the smaller things first, of course. if the transmission fails, i thought it would be a gradual failure and this has been catastrophic. is that why you are erring on the side of upstream (to the transmission) failure and not the transmission itself?. thanks
 

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Re: (nrwhite)

The PNP switch can fail at once and cause these symptoms.<br>DO NOT keep on driving it, have the switch looked at
 

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Discussion Starter · #7 ·
i have driven it possibly....10miles since. is that enough to really fry the tranny? i will replace the pnp tomorrow. does it really make a big difference whether i get it from autozone or the dealer (apart from expense)?
 

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Re: (nrwhite)

Not good <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/eek.gif" BORDER="0">
 

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Discussion Starter · #9 ·
just went to the dealership for the pnp switch ($160) and spoke with a master tech there. first thing he said was that the tire sizes / pressure was different between f and r. actually they're all matching; then he said that if you could feel mechanical slippage then it was the tranny. i definitely feel slippage at the moment - the car can rev and rev, especially on an incline and get nowhere. but it is in limp mode and i would expect this. anyway, he said it was definitely not the pnp. so,
 

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Re: (nrwhite)

and you believe a Volvo mechanic?....
 

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But I think it's still worth a try by switching it b/c it's quite a bit cheaper than a new tranny IMHO. If it doesn't fix it then you need to look into your options for new/used transmissions.<br>
 

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Discussion Starter · #12 ·
jrl, alongside craigslist, the forums that i have joined for our various cars have been the most helpful and useful sites i ever use on the public internet. i have been a member of this one only a very short time but already it has given me enormous benefits, for free.<br>but with this problem, it is such a mystery that it is frustrating. there does not seem to be a definitive answer and therefore i am exploring every option and piece of advice.<br>i guess i will buy the pnp and put it on. if it makes no difference to this transmission, at least i would have a new switch for the salvaged tranny i put in next!<br>so, is there any real difference between the switch sourced from the dealership ($160) and autozone's ?
 

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Don't buy some strange 3rd party part. If you can, get it from fcpgroton.com for some savings over the dealer. Otherwise (if you're in a hurry) go to the dealer.
 

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Re: (nrwhite)

Autozone has a switch that would work on a Volvo? <IMG NAME="icon" SRC="http://www.vwvortex.com/zeroforum_graphics/screwy.gif" BORDER="0"> <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0"> <br>You may as well try it and as you said anyway, you will have a new switch for whatever transmission you find
 

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JRL...someone posted over on Volvospeed about buying an Autozone PnP switch, so evidently they are available. However, that person didn't have any luck either. Someone did have some luck taking his own PnP switch apart and cleaning it. Either way, they have to be aligned correctly when re-fitted, so it would be worth reading up on that if you don't have an alignment tool. Evidently there's a way to "jumper" or by-pass the switch temporarily for diagnostic purposes too (to see if that's truly the issue), but without being a mechanic, I wouldn't know how to do it and there isn't much written about it.
 

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Discussion Starter · #16 ·
just like 'milkman' is experiencing curently in his thread, my transmission has now got to the same stage.
 
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