To rebuild or not?

[pacstud]

M5OD-R1
From what I've read about as simple as they come. 360k miles. About to put in a new engine and the only problem with the transmission is a mildish noise that is almost certainly the input shaft bearings. It shifts fine and has no issues otherwise.

So, do I mess with a rebuild or not? I have read any number of horror story threads, where the rebuild makes things worse, but I also don't want the bearings to crap out and wreck my new(ish) engine. Input appreciated.

 

[sgtsandman]

I'm a big fan of taking care of issues when they are small. They tend to be cheaper that way. You may just need to replace those bearings and be good. So, you may not need to complete rebuild.

 

[pacstud]

I'm a big fan of taking care of issues when they are small. They tend to be cheaper that way. You may just need to replace those bearings and be good. So, you may not need to complete rebuild.

I know there is a lot of "well while you're there" but for me I am learning the hard way to let happy parts be happy.

 

[scotts90ranger]

If you're handy it's not a hard trans to rebuild other than needing a really deep puller to get the back bearing out... The iffiest part about rebuilding manual transmissions is aftermarket synchro's.. if you don't have any shifting issues just do a bearing kit without synchro's... your success rate should increase.