Diff Problems in Ta22

[13BTTA22]

Hi Fellow Toyota Fans,

I have a 13B Rotor motor in a Ta22.Recently a Hilux diff was installed and under boost the dif where it connects to the tailshaft moves up and runs into the floor.I have fitted the adjustable panhard rods(the shorter ones.I think this is what they are called.They stabilize the diff I think)and still have this problem.Has anyone got any suggestions of what to do next?

Cheers

[Cuzzo]

hey i saw this problem in a mitsubishi scorpion turbo. it had a ford 9" diff but they person that installed it didnt put a rubber between the diff and floor.(apparently the fords had this from factory).

maybe try making up a rubber block and secure it to the floor. Just a suggestion.

[13BTTA22]

Yes the rubber block had crossed my mind.An easy fix and I wonder how long it would last.Any ideas on where I could get one of these?

[Cuzzo]

nah i think that something custom would need to be made up. maybe even something like what engines mounts are made from i guess they last a longerish time. Not sure were to get them from maybe ring clark rubber... (thats a long shot and they're expensive)

anyone else have an idea where to get these from? i would like to know too.

[Cool1]

Your gonna be needing some adjustable trailing arms!

[13BTTA22]

Are the trailing arms the longer arms attached to the diff?

[Jaffa]

Your gonna be needing some adjustable trailing arms!

Yep Cool1 is correct in saying you will need adjustable upper arms

There is a few other things that can contribute
If you have enought hp and running the stock rubber bushes this will cause the problem as well as they will distort . Suggest you look at putting in Nylon style Bushing.
Also maybe the mounting points on the Hilux diff have been installed wrong , this also would be worth a look

All in all the adjustable arms should do the trick

Hope this helps

[Cool1]

Is the problem that the car is squating so much that the diff is hitting the floor? Or is the problem the pinion angle?
If the problem is the later, you need to adjust the trailing arms so the diff center is facing down a little. Once the diff loads up, the angle will come back to center(assuming you set it right).

[stradlater]

I'd go with the Nylon bushes first though. I've had exactly the same problem with mine. I had the rubber bushes, and the thing twisted up like mad.. Now with the nylon ones it doesn't.

[RPM016T]

My KE15 does this with a borg-warner. Mine only interferes with the tailshaft to diff mount. the radius of it is larger than standard diff. Dodgy fix would be to 'massage' with hammer, good fix would be to cut metal and fill in with more metal where required. Rubber blocks are crap because you'll lose valuable suspension travel!

[13BTTA22]

I had some better bushes put in the rear but I forget what they are called. They are a blue bush which I got from Fulcrum suspension.I am sure that the diff is hitting because of the squatting because once the car is in higher gears you can punch the throttle and the diff does not hit the floor.Some like I am up for a purchase the the longer adjustable trailing arms.Guys thanks for the help as per usual all have been more than helpful.

[Rodger]

13BTTA22,

If you still have problems with the diff hitting, perhaps the rear end was not sitting at normal road height on its springs when the trailing arm bolts were tightened up. There are a couple of threads around about the poly bush issues.

The bushes maybe preloading the diff into a position that will cause the problem. It maybe then be possible to simply loosen the eight bolts and let the rear re-settle into a better position. Or you could preload the bushes the other way if it still does not clear.

Of course if the bushes have been correctly lubricated then all this conjecture of mine is wasted and the rear should have settled when the car first dropped back onto the ground.

Regards

Rodger

[13BTTA22]

I think for now I will try sourcing the longer trailing arms and take the car for a few launches to see what happens.If not I will continue to rip my hair out.Thanks for all the suggestions and I will keep you updated on what happens.

[oldcorollas]

i have a better idea

have a look under the car and see what angle the pinion is sitting at now.

then get someone to drive you car and see how much it squats.

then go from there

no point doing it half-arsed, just means you replace bits that had nothing wrong with them

[Turdinator]

Hi guys
I could be on totally the wrong track here but are you running the stock springs? Could it be that your running more power than the suspension can handle and it bottoming out? Maybe stiffen up the rear a bit will fix the problem.