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Thread: Gearbox problem! ... Pinion head?

  
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    GSI_Butch's Avatar
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    Unhappy Gearbox problem! ... Pinion head?

    Hi,

    For a while now I have a had 'clicking' noise' (like having a clacker thing/a bit of card in pushbike spokes) from the front right of my GSi and over time it has steadily getting louder. It only happens when its in gear, loudest when in 2nd and mainly on over run (when its in gear and car is slowing down with no accelleration). When the clutch is depressed or its not in gear, there is no noise!

    I took it took the motor to a transmission specialist today and they had a look and suspect it to be a 'PINION HEAD BEARING' ... and have quoted me over £600 plus vat to repair it. Basically take out the gearbox, strip it, replace these bearings and oil seals and put it back together.

    what is this Pinion head bearing thing?

    Anyone got any thoughts, suggestions and/or am I being ripped off?

    cheers

    Butch
    GSi Turbo - CS2 - 253bhp / 275ft/lb Torque
    1/4 mile - 14.62secs @ 95.5mph

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    Dano2k0's Avatar
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    Heavily lowered car by any chance?

    Really funny to find someone else having very simillar issues to the ones i have had.

    My car is pretty slammed, now the only difference i can see if most of the noise issues ive been having are on the passenger side, if you have both windows down its clearly louder on the passenger side.

    Since i did the ZLET conversion i didn't do that many miles untill the passenger side inner CV boot split, it soon got ragged into 2 and not realising as such, but this is where my problems started.

    I have exactlly the same sounds you describe and am sure its solely due to this rubber boot.

    Funnily enough, my dad has a GSI, we dropped his a simillar hight to mine on the same FK coilovers.

    At the time mine was making noises, got louder over time although sometimes is abit quieter than others, really odd noises.

    My dads didn't last long till his started making exactlly the same noises as my car, we had a look and sure enough his boot is in the same ragged to bits state as mine.

    Now things started adding up abit, although we haven't removed the CV to inspect what causes the sound, we put a brand new CV boot to suit a C20XE (alot cheaper to buy aswell)

    Sure enough, a new boot fitted and the noise has completely gone.

    Mine needs a new boot fitted, and i'm confident my noises are going to dissapear aswell.

    We can only assume at the moment something towards the end of the CV is able to 'rattle' about somewhat and the boot either holds this to a degree and probably mostly just dampens the noise down.

    Pure coincidence? I think not.

    I would deffinatly have a look at the inner CV boot joints and see what condition they are in, odds are on you'll find the passenger side inner is no good just like on ours!

    Have a look at those boots and let us know but i'm placing my bet right there.

    Funny how when i searched i was unable to find anyone with the same problem, around 2 weeks after mine started doing it, my dads did and now yours aswell.

    I think the problem for the boots splitting is simply because of the angle of the drive shaft on heavily lowered cars, the only real way to resolve this is by using custom engine mounts to drop the engine lower so the shaft alignment is better, although you'd probably smash your sump to bits on something so not a good idea...

    So far the C20XE boot is holding up and going well, so this is exactlly what i'll be fitting on mine very soon.

    Hope this helps

    EDIT: i thought my gearbox was having bearing failiure and drove it steady untill we found out about my dads and fixed his, since then to convince myself the gearbox isn't giving up ive gave it a somewhat hard time and its still spot on minus the noise.

    You'll probably find and agree, when under load the noise isn't there or is minimal, also just holding a slight bit of throttle usually has the same effect, just over-run that tends to make it play up the most.

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    when you say c20xe boot what to you mean? the full cv joint or just the rubber boot?

    im in the same boat, happend twice now. did you raise the car up after repairing it?
    GSi

    Built not Bought

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    Not the fully CV joint, just the rubber boot they sell for the C20XE CV, its abit shorter than the original ZLET one if memory serves, but it seems to fit fine otherwise.

    No not raised the car at all, still at its current height, so far so good and my dad has clocked a few thousand now without it giving way, it didn't last long at all on the standard boot once lowered alot.

    But then again, neither did mine lol. I shall be fitting the same rubber boot, so fingers crossed this is more durable.

    EDIT: just out of pure interest, when yours failed did you get the same odd noises?

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    Dano,

    You are absolutely spot on, the motor is indeed lowered alot. My front left inner CV boot went the other week too, there was nothing left of it! I had it changed and the noise stopped ... for a while. I do quite a few miles in the motor, not 'thrashing' miles either as I pick up my babbi. Its been about 6weeks since its been done and although the noise stopped, it seems to have come back with vengence.

    I am completely unsure what to do! as its a lot of cash to get it sorted ... wedding coming up too ;D) . im tempted to get the motor back, 'dump' it on camp where i work and buy a cheap, crappy diesel run around!?
    GSi Turbo - CS2 - 253bhp / 275ft/lb Torque
    1/4 mile - 14.62secs @ 95.5mph

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    Have you checked to see if the boot is still ok mate? I'm thinking its probably gone again already.

    I know 6 weeks seems like nothing, but when we dropped my dads car on coilovers it probably didn't last 6 weeks from previously being in perfect order...

    I would be quite sure its the boot thats either come away and isn't fastened on correctly at the CV joint rather than on the shaft, or the boot has probably split / got ragged to bits again.

    I personally wouldn't worry too much at the moment, check your boots again is what i'd do first as i think its either not fastened to the joint properly or has probably split already which wouldn't supprise me, i didn't do many miles before mine went either..

    If its the boot thats gone again fit one thats made for a C20XE because so far this has prooven a good fix over the standard one for the time being, wether it'll last or not we'll find out as my dad does high mileage every week!

    If its just the boot, do it yourself, pop the shaft out, slip the new boot on and you'll be good, just regrease the joint then secure the boot, if you can use a few basic tools should be easy enough.

    I don't think there will be anything wrong with the gearbox at all, i think worst case will be a new CV joint if its run abit too dry and got grit in it from when the boot was ragged to bits.

    I deffinatly wouldn't spend anything on the gearbox bearings unless you have good proof and reason to believe you need them doing, my money is on the boot being no good again, or worst case the CV joint itself isn't in best shape anymore.

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    I'm just worried as it seems to have got louder over the past few weeks! however, there has been no affect on the performance and i cant feel any difference in the gearbox.

    I am going overseas soon so the car will be dumped on camp for 8weeks so hopefully there may be a proper solution

    As you say, i just dont want to spend out £800 on 'fixing' the box when its only a CV joint.

    Have you had any problems with your left driveshaft? as I had to change mine about 6months ago but only changed it for a second hand one.
    GSi Turbo - CS2 - 253bhp / 275ft/lb Torque
    1/4 mile - 14.62secs @ 95.5mph

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    yet another cv joint goes....

    i know i posted this in the other cv joint post but this seems to have solved my problems
    http://cgi.ebay.co.uk/STRETCH-CV-BOO...d=p3286.c0.m14

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    Are the perils of excessive lowering, you pays your money you takes your choice.

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    Does the CV joint have bearings? and if so could they have got dirt in them that has damaged them when my boot was practically non existant?

    taken from a well known site...

    Quote Originally Posted by wiki
    If the gaiter is damaged, the molybdenum disulfide grease with which the joint is packed will be thrown out. The joint will then pick up dirt, water, and road deicing salt and cause the joint to overheat and wear. The grease can also contaminate the brakes. In worst case, the CV joint may disjoin causing the vehicle to stop moving or lock up, rendering the car incapable of steering.
    Quote Originally Posted by BurrTony View Post
    Are the perils of excessive lowering, you pays your money you takes your choice.
    Tony, yeah thanks for that!
    GSi Turbo - CS2 - 253bhp / 275ft/lb Torque
    1/4 mile - 14.62secs @ 95.5mph

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