T90 Leaking

My transmission is leaking and I'm having trouble figuring out where the problem is. I rebuilt the transmission with a couple new gear, synchros, seals, etc, so it's got to be something I did, or forgot to do.

The gear oil is dripping out of the bellhousing when the engine is running.

The transmission is in neutral. The oil level is only up to the fill hole. The oil collector is still there. None of the bolts are missing. What should I look at next?

 

Did you install a sealed input bearing or use the felt seal on the input? I've found if you don't soak the felt seal prior to installation they tend to burn up on initial start up and leak. They typically always seep but shouldn't leak like you're describing. Did you use sealer on the front bearing retainer gasket and bolt threads? If not could be leaking from there. If you used too much on the gasket it could plug the oil return hole on the front of the case causing the oil to get for Ed past the felt seal
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Stock type bearing. I honestly don't remember seeing a felt seal in the gasket kit. That must be it.