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GQ Dual Cab. TD42Ti with fruit.
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You have an auto trans I assume.

Have a look at the breather on the top of the box and see where it runs to. I am not aware of the factory spot, but engine bay sounds likely. Make sure your breather is not blocked.

The oil on the bottom of the gearbox has not leaked from the drain hole in the bottom of the bellhousing by the looks of it. It seems to be coming from where the housing bolts on to the gearbox. The breather on the RE4 is on the rear of the box, on the LH side, just in front of the extension housing. Seems unlikely that the oil would be coming out of there and then dripping off the bottom of the box. Also if the breather was blocked, you would not get ATF in the engine bay. Not looking good.

@JFF45 is our resident authority on the RE4, so perhaps he can help here.
 

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GQ Dual Cab. TD42Ti with fruit.
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5,697 Posts
If the oil level is now way up the dipstick and it wasn't yesterday, then that is an odd issue. The oil level will vary when the engine is running, as the engine drives the oil pump in the box. So you start the engine, the gearbox oil pump starts working, and in turn the sump level lowers. Just like our engine.
 
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