So, I've had this noise in my W56 tranny for a year or so now. Sounds like an imput shaft bearing as it's a bearing/rattling noise that is only heard in 1,2,3 and 5 gear. Not 4th. A local tranny shop put a new bearing kit in this thing about 3 years and 15,000 miles ago, so I don't understand why it would be going out now.

The tranny shop confirmed the noise sounds like a bearing, but they called it a balancer shaft bearing. Is that the same as imput shaft? They also said I shouldn't worry about it. <img src="/forums/images/graemlins/confused.gif" alt="" /> That it will not cause me to get stranded anywhere and will just get louder and louder. Hmmm, since I travel to extremely remote areas, the last thing I need is my tranny siezing on me. What do you guys think? I changed the oil and it was a little gray, but no visible silver in the tranny/t-case oil.

Mine has been making that noise for about 6 or 7 years. Since it's just a trail rig I haven't been too concerned about it.

I think it is the sychros wearing and needing replaced. I don't know what damage is possible if left alone too long. I guess it might be worth finding out though, huh? One of these days I'll get to it...

My W56 did the same thing its last couple of years. Went for several 10s of thousands of miles like that. It never left me stranded or did anything strange, just the whining sound in 1,2,3 and 5th. I always assumed it was the countershaft. It had 250k miles on it so I had planned to replace it anyway.

About a year and a half ago I put in a Marlin replacement. It was slick and they accepted my old one for a core refund. Been fine ever since...although only a year and a half so far. Just putting in a good word for marlin if you want to consider replacing the whole unit.

Sounds like your hard parts might be on their way out.

When some fool tells me to 'not worry about it', I *DO* start worrying!! Theirs is not the butt to get stranded.

I like what the roomie does to the mechanics, "If this problem was on your sister's car, what would you do?" Gets a straight answer every time.

You mean like the gears? They supposedly replaced the bearings and snycros when they went through it a few years ago. Total miles is something like 210K. But this poor truck has hauled a lot of weight most of it's life.

redline mt90 baby stuff did wonders in my tranny

Hard parts---there are tranny components which have a harder material which covers them. Once this breaks down, then it's time to do a little more maintenance than just bearings and synchros.

For as low a mileage you have on the basic rebuild, it makes me wonder if something didn't go back together right, but you know how it is tryin' to troubleshoot thru a CRT!

I had 189K on my first tranny before it was rebuilt. The shop guys didn't believe me when I told them the mileage for the ticket. She went another 5 years in this Arctic stuff before I had to just send it off as a core.

If Marlin can't do ya right, check with www.risingsunengines.com

Hey Brain, I've been seeing Toyota tranmissions popping up on Craiglist alot lately. Mosty from V8 swaps. For $300 it might be worth just grabbing one cheap and hanging onto it till you need it.