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The mkiv Supra Owners Club

selector seal. How to tell from prop seal


bodilx6

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I've got a bit of oil bleeding from the back of the gear box. I think its the prop seal, but I don't know where the selector seal is to check that.

Per suggestion from an old thread I should wipe the entire area and check. But where do I look for the selector seal?

 

Is that easer to replace than the prop seal and would I avoid removing exhaust, and prop shaft?

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Found out from supraforums...

 

I've found the shifter seal can just be pushed in a bit and then "double seal" it with the new. But is there any easy yet safe way to remove the prop/DS seal without a special tool?

 

It seems silly to book Toyota for stupid money due to a special tool.

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Waste of time mate, I had my seal replaced the traditional way from underneath (pita) and then when this continued to weep I had the second one pushed in over it. So I have the double seal suggested in the link and it still weeps oil :)

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Waste of time mate, I had my seal replaced the traditional way from underneath (pita) and then when this continued to weep I had the second one pushed in over it. So I have the double seal suggested in the link and it still weeps oil :)

 

Makes me think it's not the seal then. Have you changed the main rear bearing?

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It is the seal, yep bearing/seal changed too at the same time by Phoenix.

The selector weeps down and makes it look like it's the rear seal causing the leak. Mark @Phoenix took it all apart again after a couple of weeks of doing it the first time and added the selector seal to the existing one. We looked at the exploded diagram of the box at the time (way before those yanks :)) and decided that there was plenty of room for two seals and no reason not to add the second.

 

When you work out how much oil it loses it's bugger all, just annoying I guess but after all the time and cash I spent on sorting it I have given up and now accept it:)

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You must be extremely careful not to scratch the selector shaft bore in the box, that is why it is easier to put in a second seal. If the bore has been scratched by a ham fisted attempt in the past it will always leak. I made up my own shaft seal tool to put my second seal in my box, it is perfectly dry now.

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I still can't figure how to tell which is leaking. I only get a drop a day or so and after lying under the car with a lamp I still couldn't figure which is leaking. I can see both the selector input shaft going into the gearbox and the propeller shaft going into the box but none of them seems to have much oil on or near them. The car is undersealed which makes it even worse seing anything.

 

I'm guessing the only way is to get the car on a ramp to get to the hard to reach places and then wipe them completly clean.

 

Is there nothing else there can leak downthere? I have the drops of oil from the absoulte rear of the box on the single "fin" behind the oil drain.

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No, the gearbox isn't. But everywhere around it, and both selector rod and propeller shafts seems to be nice and clean(ish) around the seals. But the area around the prop shaft seems wet, which makes sence that the oil would be thrown off the shaft due to centrifugal forces. But it is hard to evaluate due to the sealant around the back end of the box and prop shaft...

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