Based on the failure amount of the 4L30E trans.I have gone through 2 allready , one due to a plug popping out , and also the seal on the side had an O-ring failure and started to gush out fluid there.The manual trans seem to go a lot longer than the autos.I do look after my trans , and I use synthetic fluid in it , plus i flush it every so often also so that all the old stuff is completely gone.

I have seen more then a few posts of people looking for a reputable place for a new 4L30 or someone that can do a good rebuild on it.I do have one spare tranny , but it needs to be rebuilt on the front where those rings are , the plastic spacer one is missing in it.