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Thread: Setting up TA22 rear links.

  1. #1
    Junior Member Grease Monkey
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    Default Setting up TA22 rear links.

    Hi Guys,

    I have done several searches and can't seem to find what I'm looking for! I do find this place hard to search even keeping my keywords to a minimum!

    Question One:

    My diff is pointing upwards and I want to correct it before I change my gearbox.
    I want to get the rear end sorted first. I realise this may change a little after the box swap but right now it is so WRONG!

    I have polybushes in all of my 4 links but I have just bought some adjustable upper links from Sleeka spares and want to fit them and set the pinion angle.

    When I fitted the polybushes I allowed the car to sit level with all the eye bolts loose and then I tightened them up once it had been rolled backwards and forwards and was settled. Is this the correct way? The Green Toyota chassis book says to remove the springs , level the ride height then re-fit the springs once both sides are the same. They use a measuring tool but I've never done it that way before.

    Question two:

    My understanding of the rubber Toyota bushes is that they are bonded in to the eye and do not spin on the bolt as the inner sleeve is tight against the bracket. They rely on the rubber twisting?
    With polybushes again the inner sleeve is tightened against the bracket so does the bush spin in the eye to allow movement? Do they need constant lubrication if so?

    Any help would be appreciated as I also want to fit a lower ratio diff and would like it set right so I don't screw it up!

    Cheers,
    Brian

  2. #2
    Junior Member Backyard Mechanic
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    Default Re: Setting up TA22 rear links.

    Brian, are your springs standard height? Changing height can have small effect on pinion angle. Also, out of memory, pinion angle should be 4 to 5 degrees above horizontal, see if I can find more info. If possible have car on wheels sitting level with tailshaft out, use protractor with spirit level built in, check angle of pinion flange to vertical.
    You should only need to lube poly bushes on assembly, unless you do lots of kms per year.

  3. #3
    Non qualified Domestic Engineer
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    Default Re: Setting up TA22 rear links.

    Quote Originally Posted by ToyTA22 View Post
    Brian, are your springs standard height? Changing height can have small effect on pinion angle. Also, out of memory, pinion angle should be 4 to 5 degrees above horizontal, see if I can find more info. If possible have car on wheels sitting level with tailshaft out, use protractor with spirit level built in, check angle of pinion flange to vertical.
    You should only need to lube poly bushes on assembly, unless you do lots of kms per year.
    I have a digital box level/inclinometer that I got off ebay years ago. Something like that would be ideal. Jack the back of the car up, place box level on sill panel edge and zero it. Then hold it against the pinion flange. Bingo, 1 pinion angle (may have to subtract 90*, depending on how you held your tongue).
    Quote Originally Posted by oldcorollas
    except for a very few exceptions
    "Don't worry what people think, they don't do it very often."

    Daily: Glorified Taxi (F6 Typhoon). Out Of Action: Twin-charged Adub. Ongoing Nightmare: Over re-engineered (not) Alfa Romeo 75.

  4. #4
    Junior Member Automotive Encyclopaedia
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    Default Re: Setting up TA22 rear links.

    Are your 4 link trailing arms standard Factory Toyota ones or after market ones, I know you are talking about fitting some adjustable ones later on, but if they are standard arms & standard diff & body mounts it must come like from the factory ..

    The important thing is that the diff pinion flange angle matches the opposing angle on the output of the transmission so the Uni's basically cancel out each other, so for example if the diff pinion faces say 5 degrees up the trans output should be 5 degrees down ..

  5. #5
    The old One Backyard Mechanic
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    Default Re: Setting up TA22 rear links.

    Brian

    Put Pinion Angle into Mr Google and push the enter key. There is a wealth of information on this issue from advice on how to measure pinion angle to starting position for different suspensions setups. Basically the end result is that the angle should be zero in load position - but many factors to be consider. Have a search and a read.

    Craig

  6. #6
    Junior Member Grease Monkey
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    Default Re: Setting up TA22 rear links.

    Thanks guys for all your input. It's appreciated.

    Craig, I have done the Google...I did that first before I bothered this forum....and I know how to set the pinion angle and as far as I am aware......you are looking at 4 degrees downward to allow for the torque to bring it level. I know this figure is ONLY correct if it corresponds with your gearbox level and tailshaft orientation.

    My concern is the 4 links. I am sure that when i fitted polybushes when I tightened them up the diff wasn't pointing up at the angle it is now. The springs and shocks are Group 4 Escort rears and are in new condition. There is no sagging through broken suspension.

    This is why i am wondering if they have "seized" in the wrong position.

    I will fit the adjustable top links with the lower ones loose and adjust the pinion angle to reflect and cancel out the tailshaft angle and then tighten them up and hope for the best!!




    Last edited by BrianGT; 29-11-2014 at 10:43 AM.

  7. #7
    Junior Member Automotive Encyclopaedia
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    Default Re: Setting up TA22 rear links.

    Being poly bushes no matter where you tightened them, ie loaded or unloaded no pinion angle is going to / can change its physically impossible & even OEM rubber bonded mounts with the serrated internal sleeves nothing will change angle wise but if done up tight unloaded the bushes will be under constant loaded / twisted force when the car is sitting on the ground & so will destroy themselves quite quickly as opposed to setting them up correctly by tightening in a loaded state ..

  8. #8
    Junior Member Grease Monkey
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    Default Re: Setting up TA22 rear links.

    I completely understand your post and I do think i tightened them in an unloaded state, as in not allowing for what happens when you apply power.
    I'll fit the new links and see how I get on. Many thanks.

    This is what I was looking for.........when and not to tighten them!

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