Manual Transmission Sound

Is your clutch pedal or slave cylinder squeaky when pushing the pedal down? It's really hard for me to hear the whine in that video which might be a good sign, but it sounds like there's grinding when you push the pedal down, which might just be a squeaky spring? (mine can get squeaky) If it is grinding, I've never had that sound.

The whirring you're hearing is a lot deeper than mine, which makes me think it's a bearing. I think you're going to be fine on that trip, sans the grinding sound (which might just be your pedal spring).

 

Yes, I've had a squeaky clutch pedal spring for years. I've tried lubricating it but it just continues to squeak. I basically don't hear it anymore when driving because it has been there so long.

When I'm under the truck, the grinding sound is louder. It's a quick, deep whirr. Bearings "complaining" is what comes to mind when I hear it. Like bearings coming to a stop in their raceway. The shop that did my clutch had it on the rack and listened. They thought it was the input shaft bearing. That was a year and 15k ago. So, I agree with you on the probability of it is a bearing noise.

The truck drives fine even though there is a feeling of resistance. My worry is that the end of the input shaft will get damaged. Or that the bearing will completely fail and bits will work their way back into the transmission and cause greater damage.

I asked Joe if it will risk more damage to drive with a bad input shaft bearing. He said not anymore than has probably already happened. But of course, this opinion is all dependent on the diagnosis being.

Thanks for listening, it is helpful to get other people's thoughts. We may play it safe and stay home this time, but still deciding. I hate to give up a scheduled vacation...

 

@ab_1280 I'm curious what it sounds like if you let the pedal in and out slowly. This will be more indictive of bearing failure vs shaft play imo; it would also separate the spring squeak out to hear if there is real grinding.

If your hearing grinding I'd be very cautious.

 

I'll check again tomorrow and post another video. (We decided not to go on our trip...we'd probably be okay, but it is probably better not to push it.) And of course I'll post again after the rebuild as to what was worn out. I'm also curious what they find with yours.

I watched the video you sent earlier, plus the Timmy/Toolman vids on rebuilding a R150F with Nick. They helped me to understand what inside there and what could be going on.

Thanks for checking in.

 

Mine sounds the same (like the video) before and after my trans/clutch rebuild. It still has a very slight resistance. But 30K miles on it runs fine other then the normal 5 speed notchyness.

 

Interesting! I will be a little disappointed if the transmission sounds the same after the rebuild. However, at least I will know that the bearings are all good. Who did your rebuild?

 

Awesome! Can't wait to hear about your experience with Y1. Are you going with the standard 5th gear, or the .69 Dyna ?

 

Had a great time. Chatted with Joe for a bit and he called Nick out and we went over what we thought the problem might be. Nick is pretty certain it's the pocket bearing but he's going to exam the shafts. He looked over the Marlin crawler rebuild kit I bought 4 or 5 years ago to make sure the bearings were still good. He immediately could tell the seals and pocket bearing were trash non-oem, and the synchros were the wrong sizes, and one of the bearings was the wrong size, they gave me 3 third gear synchros... It's possible I may have bought the wrong kit 4 years ago.. So I'm glad I didn't do it myself with those parts cuz I either would have got stopped or fucked up. They're going to harvest the synchros and bearings that I can't use in shop which I'm glad they're not going to waste.

I'm going with the dyna 5th gear upgrade, and I may go with the new low 1st and 2nd I'm still deciding. If the counter shaft needs to be replaced I will def get the new 1st and 2nd.

Joe took me on a tour and showed me a bunch projects and what they're working on in the shop, it was a good time.

 

Thanks for the update, it is nice to talk things over with someone dealing with the same issue. Great to hear about your experience and very confidence building for me. It sounds like they have their act together. I'm glad they caught the wrong synchros/bearing issue.

I told Joe I'd like to spend some time with them when I drop off. I'd like to put a few more mods in to mine. I'd like new shocks and maybe look at a few other items. But the pocketbook will need some repair first.

Maybe if they are willing, I'll pop the hood and have them take a look. I have some leakage on my transfer case coming from above. I'm expecting to need to do the valve cover gasket at some point. Perhaps the usual laundry list on a 400k+ miler.

I didn't get around to recording the sound again today, but I will tomorrow.

I'm probably going to do the Dyna 5th as well. But, I want to ask them how it might affect towing. I don't tow much, but if I do, the lower RPMs in 5th with the Dyna may mean I need to stay in 4th on flat freeway driving. Thinking about it.

What are the new low 1st and 2nds? Are you thinking of changing ratios in those as well, or do you mean replacement due to wear?

 

I used All Standard Transmissions in Campbell Ca. They are pros... an old school shop and thats all they do do. They were recommended by several TW users. 5 day turnaround when you drop the tranny off. They opened it up and said it looked almost flawless inside... only a very slight wear pattern on one of the gears (but it wouldnt effect anything). We choose to rebuild it because why not... everything was open and on the work bench. My clutch, bearings, etc looked brand new too but we replaced them as well.

I was disappointed when it sounded exactly the same when we got it all back together. The positive thing is that I now know everything inside is brand new... and I just gotten used to the whine. Lots of others report the same experience.

 

Here's the 2nd video with a very slow press of the clutch in/out. Sounds pretty much the same to me as with normal clutch operation in the 1st video I posted.
Clutch out = more noise in neutral. Clutch in = quiet.

I am looking forward to having Yota1 go through it. I will ask them to check shaft runout, etc, but perhaps this is part of their normal routine. Once this is done, I want to start in on the rest of my laundry list (new shocks, CV boots, brake pads, valve cover seals, broken fill tube for the windshield wiper fluid, yada-yada....)

Once they have yours apart, it will be interesting to hear what they find.

https://youtu.be/_w--U1eIyMc

 

In the new video it sounds a lot like mine but not as bad. I'd say you're good for a while.

I've done that whole list and I'm about to do some of it over (suspension).

 

that is the same similar sound mine is making except it is much louder/noticeable than your audio video
the whirring noise at idle that goes away when the clutch pedal is pressed full to the floor
what could it be?

 

is it potentially possible that the R150F from the 2002 Yota1 rebuilt and shipped out to me had excessive internal wear from the prior driver/vehicle it came out of that would cause this whirring sound at idle that definitely goes away when the clutch pedal pressed full to the floor? that was not normal in the original '97 R150F that i had over 340k miles on before the pilot bearing issue was discovered

 

Hi Black97v6MT, I don't know what the noise is. I think others with more knowledge than me have posted some possibilities (especially czotie).

I have decided to go ahead with my rebuild with Yota1. I'd like to stay ahead of the issue and do the work before it gets much worse. I'm having my original R150F rebuilt. I'm hoping that by doing so, the possibility for further damage is less. Also, I'd like to know that all the bearings are good, add new synchros, etc, and that the main shaft and countershaft are to spec. Since Yota1 is rebuilding and re-installing, I think I will have a better warranty situation than by separating the tasks.

Given the experience of others, it could be that my transmission comes back with similar sounds. We'll see how it goes. But at least I will know I've done what I can.

I think the long term durability of these transmissions and the 1st gen in general has been demonstrated to me since I'm over 400k on mileage. Anything at this point is gravy, even with some $ being nec. I expect I'll need to put another chunk of $ into the truck after this (valve cover, CV boots, shocks), then perhaps settle into another long interval of driving with less investment necessary. Here's hoping...

 

are your engine mounts original? transmission mount?
if i asked this before somewhere and you already replied...i suffer from that awful CRS syndrome
maybe Nick knows of a good source for a new transmission mount for these

 

Yup, engine mount is original, transmission mount is too. This is the first time I've rebuilt anything major like the trans or engine on the truck.

 

Looking forward to seeing how it plays out for you. Nice video -- captures the same sound I've had for 9 years. I was concerned when I bought it and had the then 86k miles trans rebuilt. No change and same samekl now 100k later. But maybe its the shaft as you suggest. Keep us posted -- GL.

 

@czotie - any updates on what Yota1 found with your transmission? I'm scheduled to take mine in on Monday the 23rd. I'm curious if Nick has taken yours apart yet.
Thanks.