Ok Now I’m up to speed. With that said.please post a video that has sound so we can hear what you’re talking about. Could be just Normal gear whine or might be somthing else. I have heard that their is Not to much that you can and can’t do wrong. Example the gear kits don’t have shims or spacers that one could install to make the transmission more or less quiet. My only take away is this. If I was having a transmission rebuilt I would use all new bearings & seals and use the heavy weight oil I could and use motor honey and then it’s out of your hands.
Question if it’s a parade car is gear noise/whine really even an issue. I can understand if it’s your normal daily driver where your having a conversation and the transmission noise is getting in the way, but for a parade car is that even a thing low speed ect just asking
Well, the reason I even brought it up was the noise is way more that before and I wanted to make sure it wasn’t something harmful to the mechanics.
The whine is actually not an issue in a parade. The music will be way louder… ha ha…
I still need to make that video but I started down a different path yesterday since I was kinda stuck in the shop. I’m making the wood parts for the engineer’s cabin, (it’s a locomotive). I will circle back as soon as I can. Hopefully today…
Question: is the gear whine happening while the car is
Under acceleration?
While coasting?
While regenerating?
2 different types of whine. Acceleration & Regen
Noise whine kinda sound the same Regen whine is a much louder version of Acceleration.
Gear whine is diffrent. So knowing what’s making the noise is an important step in getting it under control.
Example if it’s coming from the Motor it could be a Motor bearing or a Rubber bumper fix.
Or
It’s could be the transmission or it could be both
Stupid question time. Did you replace the rubber bumper in the Motor? And did you Lube the inputshaft and CV joints when you re installed the transmission?
BTW this is the Honda Molly Paste that was recommended by McCormick to reduce input shaft and cv joint & Hub noise. This lube has plastic in the lube and dosent get thinner as it gets hot like normal lube
The whine is under acceleration for sure. Not a regen noise, I don’t remember if it was while costing. I will remember to check that out.
There is no rubber bumper. Manual says to discard that before install but mine is an old cart, there wasn’t one when I pulled it apart. And the noise is new since the gear change…
I did replace one boot on one CV joint and when I did I cleaned out the old lube and put the lube they sent me with the boot kit. I did not re-lube the second one because I never opened the boot on that one.
I did lube the motor input shaft on the spline. The bearing lube was in tact. They are not sealed bearings so I assume they will also get gear oil from the inside.
All cars No matter what year. Require an Input shaft “Motor Bumper” if you don’t have a rubber bumper in your motor coupler then that’s 1/2 your noise & problem. Solid you don’t have that go ahead and remove the motor. Install a NEW motor bumper. And be sure to use the Molly lube I posted a link to
Good Point. When he changed gears did he replace with all New Bearings? I know the 9-1 High Speed gears from R4F come with only 2 Gears 1 is the Large Main Gear and #2 is the Intermediate gear. Looks like a bigger version of a input shaft gear.
Uh… Looking at this pic I noticed the shiny spots on the small shaft. If that is the shaft that the motor connects to, I would consider checking and adjusting the alignment if that is even possible. Also. When it comes to grease it is best to live lightly coat the male splines. Do not pack the female shaft… if the shafts are in good shape the grease can’t escape and will keep the shafts from seating. Grease will not compress… You’ll notice cause it will push back out when you put it in.
OK… I’m curious… it didn’t have a rubber bumper before and the noise wasn’t there… also the manual says no rubber bumper… discard the factory one before install… So is this rubber bumper tribal knowledge? If I do need to put one in there, what pray tell do I use and how big?
That small shaft is the new input shaft. I put a small coating of great with my finger on the spline before I installed the motor. I did not pack it… as well I was not aware that grease doesn’t compact. Good to know.
I took the time to move everything out of the way so I could get this thing out for a video of the noise… just as I was getting ready, the neighbors gardener started mowing with his big ass mower. He usually is at if for about 45mins then the blower starts… So I will give it another shot tomorrow…
Ok I’ll say it 1 more time and then I will leave it and this thread alone. You motor Either has the Rubber bumper installed and you don’t realize it OR it has no Rubber bumper.
Either way Your MOTOR needs a Rubber 100% no questions asked. Do not pass go, Go straight to Jail.
So I suggest you make sure of the rubber bumper status. Do you have one installed yes or no?
When you are sure either way get back with us and that We can continue this conversation. I can tell you with 100% certainty, that if your motor has no rubber bumper in it, it’s going to make noises that you will not like.
100% sure there is no rubber bumper, as I have been saying… I am also sure that even though it has no bumper, the noise that is there was not there before. Of course that doesn’t mean with the new input shaft, the noise wouldn’t be there like before.
If I really need one of those, where can I get it?
Ok cool we are getting some where. You have no rubber motor bumper. Thats for sure 100% PART of your Problem. Put a new motor bumper in and then Get back to us. Be sure to use the recommended Honda Molly grease
I am holding off judgement until I hear this noise. I’m not convinced lack of a rubber bumper would create a gear whine noise.
I have always installed the rubber bumper just because everyone said it was supposed to be in there. My mechanical side questions it’s actual purpose.
Since the motor is open ended (no support bearing) on the coupler end, The rotating assembly(armature) relies on the support of the input shaft to keep it aligned. Usually the problems (vibration) are worse if the splines are worn out. Since you just replaced the input shaft, at least one half of the coupler is new.
It is possible that something might have come off inside the motor and is rubbing on the armature causing the whine (much like cards in the spokes of a bicycle). This would be more of a buzz.
If you did a quick clean out of the motor, it is possible you are hearing the brushes chattering on the comms?
Bumpers
I see a few of the bumpers on Amazon. I have not tried the toothed version. People say either one will work.
I used key words such as:
“GE motor bumper” and came up with a couple options as such.
See which one gets to you first. Vary the key words and see if others show up.
I know you said that it didn’t have a bumper but I would advise that you double check inside the motor coupler, they have a tendency to get squished in and not noticed. I had to use a pick and flat head screwdriver to get mine out- and it didn’t really look like there was one in there because it was dirty and grimy. You really don’t want to double up on those if there’s already an old one in there, people have reported bearing problems after doing so and it can lead to expensive problems. And they are also a wear item that should be replaced from time to time.
