Manual Transmission issue...
#1
Manual Transmission issue...
I have been getting some noise from the transmission recently... a buzzing that sounds like a loose skid plate. It happens in every gear, at around 2000 Rpm. As it sounds like something loose and vibrating, I checked all of the plates, the heat shield on the exhaust manifold, etc., and everything is tight. There are a few reasons I'm thinking it is transmission related.
First of all, it does not occur until the engine has reached it's nominal operating temp. Second, and this is the main reason, the original tranny started doing the same thing at the end of 2016, and ultimately ended with a synchromesh failure in 5th gear. The transmission was replaced with a new unit (Aisin AR-5) in January of 2017. Unfortunately, and also quite frustratingly, the warranty from GM was for 12 months or 12,000 miles. It has been 14 months, and 15,000 miles since the replacement so it would seem I am **** out of luck at least with regard to getting this done under warranty.
So... my questions for you are:
A) Has anyone else experienced anything like this?
B) As this is exhibiting exactly the same symptoms as last time, do you think something else could be to blame, e.g., transfer case, etc... something the transmission is attached to?
Am open to any suggestions at this point... I realize this is going to be an expensive fix, but I'd rather not have to go thru this again a year or so from now. Thank's in advance.
First of all, it does not occur until the engine has reached it's nominal operating temp. Second, and this is the main reason, the original tranny started doing the same thing at the end of 2016, and ultimately ended with a synchromesh failure in 5th gear. The transmission was replaced with a new unit (Aisin AR-5) in January of 2017. Unfortunately, and also quite frustratingly, the warranty from GM was for 12 months or 12,000 miles. It has been 14 months, and 15,000 miles since the replacement so it would seem I am **** out of luck at least with regard to getting this done under warranty.
So... my questions for you are:
A) Has anyone else experienced anything like this?
B) As this is exhibiting exactly the same symptoms as last time, do you think something else could be to blame, e.g., transfer case, etc... something the transmission is attached to?
Am open to any suggestions at this point... I realize this is going to be an expensive fix, but I'd rather not have to go thru this again a year or so from now. Thank's in advance.
#3
Has the vehicle been checked over by a professional to confirm your diagnosis? If it is the transmission what does the fluid look like? A fluid change might solve your problem. Is something else causing the failure, like a bad transfer case bearing?
#5
I have not had it back in for diagnosis as I thought I would reach out to you guys first to see if anyone had either run into a problem like this previously, or had any ideas that I had not thought of. My gut tells me that this is a systemic problem, e.g., not necessarily the transmission itself, but rather something it is attached to, such as the transfer case.
Last edited by ProphetPVD; 04-30-2018 at 09:17 AM.
#6
Thanks for the suggestions and will have them check both of those when I bring it in to have the transmission torn down, which is now looking like an unescapable eventuality.
#8
Guys... just want to bounce an idea off of you. Do you think there would be any value in trying a higher viscosity or synthetic transmission fluid. The weather is warming up here in the northeast and I noticed over the last couple of days that the noise is not based on whether or not the fluids are up to their normal operating temperature, but rather how long the transmission has been operated, which could be a case of the transmission oil becoming less viscous as the fluid temperature rises.
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