fnlyfnd Posted June 21, 2006 Share Posted June 21, 2006 So when I am driving at 38-42mph in 4th gear I feel a very minor bucking. Almost like going over very small bumps. New plugs, wires, fuel filter, rear diff., tranny oil (3k), motor oil, oil filter. So I dont think it is a maintance problem. I don't know how to describe it better than "bucking".....I don't like saying bucking because the rpms arent changing, throttle is light just to keep it around 40mph, and my head isn't jerking back and forth. I also noticed today when I rev the engine up to 1500ish there is vibration that I can feel through the gas pedal and steering wheel and my knee on the center console, my gf could feel this on her side a little bit. I am wondering if I need new motor/tranny mounts?? is there a easy way to check the mounts, like rocking the car?? Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 22, 2006 Author Share Posted June 22, 2006 I'm way to descriptive :-p Link to comment Share on other sites More sharing options...
rlsimpso Posted June 22, 2006 Share Posted June 22, 2006 I am guessing you have a manual trans (tranny oil) right. The problem you describe sounds like what mine did when the knock sensor was failing, but only the moving part. I didn't have any vibration issues, and the MIL came on with a knock sensor error. I've got 160K on the original mounts with no problems. Could it be a misfire? I had a loose plug wire on my GL that caused that sort of problem. Are the new wires Bosch by any chance? I have had problems with those in the past. Link to comment Share on other sites More sharing options...
idosubaru Posted June 22, 2006 Share Posted June 22, 2006 hard to say....did you use Subaru OEM wires? if not, might want to consider that. did this stuff start happening shortly after replacing anything? that would point to something not being "just right". Link to comment Share on other sites More sharing options...
nixon Posted June 22, 2006 Share Posted June 22, 2006 This sounds familiar! My '99 S-turbo does the same thing. Gentle bucking at 1500 rpm (38-42 mph) in top gear (auto box). It isn't apparent in lower gears, and isn't there all the time. I first noticed it when the Maf sensor was replaced to cure severe hesitation on acceleration, but it could have been masked by the faulty maf sensor. To your list of parts replaced, I can add Lamda and Knock sensors. All parts are OEM. The dealer is mystified/not very interested, and thinks it is a failing sensor (wait for a cel), or dodgy auto box (£2500). So I'll be interested to see if you fix it! Link to comment Share on other sites More sharing options...
nipper Posted June 22, 2006 Share Posted June 22, 2006 So when I am driving at 38-42mph in 4th gear I feel a very minor bucking. Almost like going over very small bumps. New plugs, wires, fuel filter, rear diff., tranny oil (3k), motor oil, oil filter. So I dont think it is a maintance problem. I don't know how to describe it better than "bucking".....I don't like saying bucking because the rpms arent changing, throttle is light just to keep it around 40mph, and my head isn't jerking back and forth. I also noticed today when I rev the engine up to 1500ish there is vibration that I can feel through the gas pedal and steering wheel and my knee on the center console, my gf could feel this on her side a little bit. I am wondering if I need new motor/tranny mounts?? is there a easy way to check the mounts, like rocking the car?? mileage please , i have a few ideas, but i need that nimber nipper Link to comment Share on other sites More sharing options...
nixon Posted June 24, 2006 Share Posted June 24, 2006 I'm not trying to hijack the thread but fnlyfnd seems to have popped out for a while, so i'll keep his seat warm, and since his symptoms are exactly the same as mine, and nipper's on the case, I'll butt in! Mileage is 76000, and it's been doing it for 20000 miles, not getting worse, not getting better. Any ideas? Ta, Nick. Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 25, 2006 Author Share Posted June 25, 2006 117k. Failing clutch....I should have added that in the first post. Could it be the clutch just kinda shuddering while moving. My mpgs are on the bad end @ 22 after recent tune up. So could the clutch be kinda slipping/shuddering and I only feel it whil maintaing a certain speed? Link to comment Share on other sites More sharing options...
nipper Posted June 25, 2006 Share Posted June 25, 2006 I'm not trying to hijack the thread but fnlyfnd seems to have popped out for a while, so i'll keep his seat warm, and since his symptoms are exactly the same as mine, and nipper's on the case, I'll butt in!Mileage is 76000, and it's been doing it for 20000 miles, not getting worse, not getting better. Any ideas? Ta, Nick. you cant post a metric car on american board WHat year is it. Som subaru clutches are bugy. I think there is a tsb on this side of the pond, but i dont know if they carry on over there. nipper Link to comment Share on other sites More sharing options...
nipper Posted June 25, 2006 Share Posted June 25, 2006 117k. Failing clutch....I should have added that in the first post. Could it be the clutch just kinda shuddering while moving. My mpgs are on the bad end @ 22 after recent tune up. So could the clutch be kinda slipping/shuddering and I only feel it whil maintaing a certain speed? when you downshift or upshift and keep the same road speed does it go away? Try starting off from a dead stop in 4th gear. If you can do it your clutch is getting tired, if the car stalls your good. My other theory, which the mileage is to low for, is the center carrier bearing on the driveshaft or the universal joints. I am ruling out the mechanical stuff before we get to the electronics (my weak spot but im getting better at it). nipper Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 26, 2006 Author Share Posted June 26, 2006 when you downshift or upshift and keep the same road speed does it go away?Try starting off from a dead stop in 4th gear. If you can do it your clutch is getting tired, if the car stalls your good. My other theory, which the mileage is to low for, is the center carrier bearing on the driveshaft or the universal joints. I am ruling out the mechanical stuff before we get to the electronics (my weak spot but im getting better at it). nipper The feeling is there in 3, 4, and 5th gear at the same speed. I also did really tight 360 turns in a parking lot and there was a slight, dare I say, "bucking". It was more of a wobble feeling at about 180 and 360, like a slight "jump" in the smooth circular motion. Clutch slips every once in a while....uphill accelerating and switching gears, accelerating hard as soon as the clutch grabs on a upshift, very hard first gear starts (shaking and rattling). When the clutch does slip the rpms dont skyrocket, they just kinda go up slowly but the car doesn't move as fast as it should. Link to comment Share on other sites More sharing options...
nipper Posted June 26, 2006 Share Posted June 26, 2006 The feeling is there in 3, 4, and 5th gear at the same speed. I also did really tight 360 turns in a parking lot and there was a slight, dare I say, "bucking". It was more of a wobble feeling at about 180 and 360, like a slight "jump" in the smooth circular motion. Clutch slips every once in a while....uphill accelerating and switching gears, accelerating hard as soon as the clutch grabs on a upshift, very hard first gear starts (shaking and rattling). When the clutch does slip the rpms dont skyrocket, they just kinda go up slowly but the car doesn't move as fast as it should. ut oh .......................... The parking lot thing is a HUGE red flag. Do all your tires match and are they properly inflated? You may have 2 problems, one your not going to like at all Did you do the clutch test? nipper Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 26, 2006 Author Share Posted June 26, 2006 I kinda know where the parking lot thing is going..... Fourth gear start didn't work. I only tried it once and it was a slight incline so I will try again. I am also going to check the tire pressures and do the parking lot again. Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 26, 2006 Author Share Posted June 26, 2006 I should elaborate on the first gear starts. If I am not absolutelt perfect on reving and letting the clutch out. (I should state this is my 4th manual car, so I do know how to drive, but the soobie takes some higher rev finesse.) Ok, back to starting in 1st....If I do a "bad" job at this I will hear a metallic rattling that is very loud and sounds very bad. This is not the "cricket squell" from the tranny, but something metal hitting something metal and making loud noises. The whole car is shaking when this is happening from the clutch shudder. The clutch shudder is the entire reason I have had to adapt to the higher rev starts in first gear. Link to comment Share on other sites More sharing options...
nipper Posted June 26, 2006 Share Posted June 26, 2006 I should elaborate on the first gear starts. If I am not absolutelt perfect on reving and letting the clutch out. (I should state this is my 4th manual car, so I do know how to drive, but the soobie takes some higher rev finesse.) Ok, back to starting in 1st....If I do a "bad" job at this I will hear a metallic rattling that is very loud and sounds very bad. This is not the "cricket squell" from the tranny, but something metal hitting something metal and making loud noises. The whole car is shaking when this is happening from the clutch shudder. The clutch shudder is the entire reason I have had to adapt to the higher rev starts in first gear. Subarus dont shift like this normally. I think you may have two problems. One we wont speak of yet. the other, i think your clutch is broken (yes broken). Your showing symptons of a broken diaphram finger or fingers on the pressure plate.. nipper Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 26, 2006 Author Share Posted June 26, 2006 I got a 4th and a 3rd gear start today, with the loud metal rattling sound. So either way I need a new clutch. I am hoping the clutch will solve the other problem, but I am not getting a new clutch till september :-\. I went to the parking lot 30 seconds down the street and did 360's right after I started the car in the morning. I still had that swaying feeling when taking the tight circles, not really a "jump" like last night when it was warm. I did notice a clunking type sound very so often while doing this. Could it be a bearing? I do not notice clunking sounds while driving or in parking lots. Link to comment Share on other sites More sharing options...
nipper Posted June 26, 2006 Share Posted June 26, 2006 if this is the same car with 117K on it, its a bit soon to have the center carrier bearing go bad, but lets rule out evenrything befor i say something we are not going to like. We know you need a clutch. You may not be able to wait till sept. if there is a broken finger floating around in there, it may be sooner. Go under the car. Inspect the universal joints and the center carrier bearing. are you the original owner of the car? I am going to assume the tires checked out. In a manual, once the unmentionable rears its ugly head, it just usually gets worse. nipper Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 26, 2006 Author Share Posted June 26, 2006 Ok I am going to mention it. If the cenetr diff. does need to be replaced, will it cause more damage to anything else if I wait a few months? If the only thing that a failing center diff. will damage is itself, I'll go till I cant drive it anymore. I will search, but I dont know where to check for u joints and center carrier bearing? I only know how to do very basic stuff. I am the 4th owner. yea #4. The tires are all the same and have good pressure. It is very likely that I drove around 500 miles with a 3 - 6 pressure difference in the front driver compared to the front passenger tire. The front driver when I filled it was 29 and the rest were 35. Link to comment Share on other sites More sharing options...
nipper Posted June 26, 2006 Share Posted June 26, 2006 Ok I am going to mention it. If the cenetr diff. does need to be replaced, will it cause more damage to anything else if I wait a few months? If the only thing that a failing center diff. will damage is itself, I'll go till I cant drive it anymore. I will search, but I dont know where to check for u joints and center carrier bearing? I only know how to do very basic stuff. I am the 4th owner. yea #4. The tires are all the same and have good pressure. It is very likely that I drove around 500 miles with a 3 - 6 pressure difference in the front driver compared to the front passenger tire. The front driver when I filled it was 29 and the rest were 35. ok you spoke of the unspeakable. I think its torque bind. You cant make it an worse, as the damage is already done. Eventually the car will be a *************** on turns. i dont hink a 5-6 psi differnce will do it, but a 15-20 psi will. Get the car on ramps if you can. Look at the driveshaft. you will see 4 "X" shaped joints, one at the rear axle, then 2 at the center bearing, and one at the tranny. Grab drivesfat and shake it in all directions. Any free play the universals are bad. I doubt this is the issue but lets check. There will be some minor TB on all awd cars, which is acceptable. My obw (auto) went very quickly from "thats odd" to "why wont the car turn out of a space backwards without giving it gas". I cant tell what you have, If its normal TB it wont get worse. If it is real TB you wil know as it gets worse. Check the tire pressures every week to help extend the life if it seems to be getting worse. nipper Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 26, 2006 Author Share Posted June 26, 2006 alright I'll get under the car when it stops raining...hopefully tom. I really hope its a joint or bearing Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 28, 2006 Author Share Posted June 28, 2006 So I just checked the driveshaft for any play int it. I will tell you all that i could do not really knowing if any of it matters: I can twist the driveshaft about 1/8 of a turn. At the center of the two drivshafts I can get the entire drivshaft to move up and down with only 2 fingers (damn heatshield in the way). I would guess this is where the center diff is, but I couldn't see anything that looks like a diff. Does this mean I have a bad center carrier bearing??? I'll prolly go out in a lil and pull the heatshield out of the way, sucks that its 80 and like 95% humid Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 28, 2006 Author Share Posted June 28, 2006 Well I pulled the heat shield out of the way, the center carrier bearing is cracking and looks dry/old. There is about a 1/2" of free play in any direction when using both hands. All other u joints fell tight. I am still stumped on where this center diff is. - never mind, I searched "center" and came up with some good stuff. Link to comment Share on other sites More sharing options...
nipper Posted June 28, 2006 Share Posted June 28, 2006 that 1/2 inch of play will give you a torque bind kind of feeling. It will aslo give you weird noises and vibrations. You need to get that fixed. This may be your bad noises. nipper Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 29, 2006 Author Share Posted June 29, 2006 sweet I'll be really happy if that is it. So I hear a scratching sound when the cluth is depressed all the way at idle. Heard it when I got home tonight, I would assume its the clutch scrapping on the pressure plate?? It only happens when the clutch is all the way down. Link to comment Share on other sites More sharing options...
fnlyfnd Posted June 29, 2006 Author Share Posted June 29, 2006 Can the center bearing be ordered and installed w/o having to get a whole driveshaft?? I am seeing post that you need the driveshaft.... Order just this: - Universals & rear axle - Rear axle - Propeller shaft - center bearing Link to comment Share on other sites More sharing options...
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