RPM M12 whine or stock differential whine?
06-20-2009, 01:48 AM
#1
Burning Brakes
Thread Starter
RPM M12 whine or stock differential whine?
I'm about to have a heart attack.
I just took a 200 mile trip this weekend with the top off and the windows down. Everything was fine, until I got back into town, and I noticed a horrible whine coming from either the trans or the differential. It happens under load, or in the middle of a shift from 3rd and up. It does not whine while coasting.
I noticed that it does it in 3rd gear and above. Trans is an RPM level 4 M12 if I am not mistaken. It has 5000 miles on it. It still shifts fine otherwise.
Differential is the stocker. At home, I have a matching RPM stage 2 diff waiting to go in next weekend. My diff is worn, and always made noise (since I had the car) but wasnt nearly that bad. Made a little noise under load only.
Torque tube is a low mile Z06 unit.
I can feel the shifter vibrate, and it really has me bothered. Getting back to work on monday is not an option. I still have to drive back, and now I find out my bank account was cleared out. Anybody have any idea where the whine could be coming from?
It whines like it's a differential (under load only) but because it happens in 3rd gear and above makes me wonder if thats the transmission. I tried to fluctuate raise RPM's in second to duplicate, but couldnt do it...though the exhaust is loud at that speed.
Anyone care to take a crack at where the problem is?
I just took a 200 mile trip this weekend with the top off and the windows down. Everything was fine, until I got back into town, and I noticed a horrible whine coming from either the trans or the differential. It happens under load, or in the middle of a shift from 3rd and up. It does not whine while coasting.
I noticed that it does it in 3rd gear and above. Trans is an RPM level 4 M12 if I am not mistaken. It has 5000 miles on it. It still shifts fine otherwise.
Differential is the stocker. At home, I have a matching RPM stage 2 diff waiting to go in next weekend. My diff is worn, and always made noise (since I had the car) but wasnt nearly that bad. Made a little noise under load only.
Torque tube is a low mile Z06 unit.
I can feel the shifter vibrate, and it really has me bothered. Getting back to work on monday is not an option. I still have to drive back, and now I find out my bank account was cleared out. Anybody have any idea where the whine could be coming from?
It whines like it's a differential (under load only) but because it happens in 3rd gear and above makes me wonder if thats the transmission. I tried to fluctuate raise RPM's in second to duplicate, but couldnt do it...though the exhaust is loud at that speed.
Anyone care to take a crack at where the problem is?
06-20-2009, 06:43 AM
#2
Le Mans Master
Member Since: Apr 2005
Location: Scarborough ONTARIO
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I never heard of transmission whine before but i could be wrong, but iam sure whine could be from Differential. Usually whine dont do hurt but its just that whine bothers though.
Contact Rpm and speak to rodney himself.
Contact Rpm and speak to rodney himself.
06-20-2009, 10:31 AM
#5
Le Mans Master
Member Since: May 2007
Location: Belleville Mich.
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I agree, call RPM and talk to Rodney. That way you're getting a heads up from a great technician. Think positive, it's probably the rear and you allready have a good H/D one that will compliment the H/D trans. I too was stationed at Ft. Stewart after returning from Nam in 68. 11 Bravo (you know what I mean ). Good luck. 
