Holy freaking whino
#1
Holy freaking whino
Had my 3.73 installed along with the new setup. After I got the car the gears did make a little tiny noise on decel at 55mph but nothing bad. Been driving the car for 4k miles and its been fine.
BUT, a few nights ago at the track the car did a couple low 11 second passes. Now the gears are whining at low speeds and even higher speeds than before. Some of the sounds at low speed are pretty funky. How much longer would you say this thing will live? lol
BUT, a few nights ago at the track the car did a couple low 11 second passes. Now the gears are whining at low speeds and even higher speeds than before. Some of the sounds at low speed are pretty funky. How much longer would you say this thing will live? lol
#3
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My Motives do it now too. After about a year of hard driving they whine pretty bad. Especially on decel at highway speeds. Mine got a complete bearing rebuild too. They were set up a little tight but I have had them in for 30k miles now and yeah they whine but the rear is still holding up. IDK for how long though.
#5
Well they are motive but I read theres 2 different kinds? IDK with one they are. The #s descibing the gears are mgr-g875373. They were installed with a new 7.5 install kit but thats all I know.
I changed the fluid after around 1k miles or so. Fluid looked good. Old oil was valvoline 80w-90 and new fluid I put in was lucas 85w-140.
OK good, thanks for the info. Maybe it will last me a while.
Maybe....
I changed the fluid after around 1k miles or so. Fluid looked good. Old oil was valvoline 80w-90 and new fluid I put in was lucas 85w-140.
My Motives do it now too. After about a year of hard driving they whine pretty bad. Especially on decel at highway speeds. Mine got a complete bearing rebuild too. They were set up a little tight but I have had them in for 30k miles now and yeah they whine but the rear is still holding up. IDK for how long though.
OK good, thanks for the info. Maybe it will last me a while.
Maybe....
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You got the orange box Motives. I had the same in my 10 bolt. Loudest set of gears Ive ever been responsible for installing. Blue box Motives are typically dead stock silent.
#7
Alright thanks. I tried looking on summit racing and search but couldnt figure out what color was which. Does this mean the orange is not as strong as the blue?
Last edited by senicalj4579; 09-16-2012 at 10:31 AM. Reason: Comp issues and didnt see you wrote blue! LOL
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#8
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No quite the opposite the orange motives are made of a tougher alloy which consequently makes the more prone to noise. These maybe noisy but then again you may have broken the blue ones if you had them lol. I want to do 3.90's in my rear but they only come in the orange box so I'm a little skeptical of them being noisy
#9
No quite the opposite the orange motives are made of a tougher alloy which consequently makes the more prone to noise. These maybe noisy but then again you may have broken the blue ones if you had them lol. I want to do 3.90's in my rear but they only come in the orange box so I'm a little skeptical of them being noisy
#10
Agreed the orange boxed ones are the loudest pieces of dog crap I have ever heard. No other gear I have used has been anything like these. I will NEVER install another set of motive gears. EVER!
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I'll add to this for anyone who may search in the future.
I just had motive performance 4.10s put in with a solid pinion spacer and a mac girdle was already installed. Even with that 3 1/8th mile passes and a best 60' of 1.9 they are whinning again, but were nearly silent before the track.
I just had motive performance 4.10s put in with a solid pinion spacer and a mac girdle was already installed. Even with that 3 1/8th mile passes and a best 60' of 1.9 they are whinning again, but were nearly silent before the track.
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Blue box = Part number starts with GMxxxxx etc
Orange box = Part number starts with G8xxxxxx etc.
Typically GM or G8 then rear size then gear ratio. So a 373 for our car in blue box would be GM75373 (7.5 being the size of the ring gear). If you want a 2 series add an X to the end for a thick cut gear.
So a blue box 373 in a 2 series would be GM75373x
Orange box = Part number starts with G8xxxxxx etc.
Typically GM or G8 then rear size then gear ratio. So a 373 for our car in blue box would be GM75373 (7.5 being the size of the ring gear). If you want a 2 series add an X to the end for a thick cut gear.
So a blue box 373 in a 2 series would be GM75373x
#20
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OP, same thing happened to me with my 9". Gears silent for 2K miles, go to the track, make 4 passes and they scream bloody murder on decel on the way home. Gears were ultimately destroyed.
I blamed it on the 80/90 RP synthetic gear oil I ran and found other instances on the web were others believed this burned them too. I also blame back to back runs down the track which likely heat the gears up more than anything else on the car.
I had orange Motive gears too. I think you were also running too thick oil for race conditions.
Did you run synthetic gear oil?
Did you make back to back runs?
I blamed it on the 80/90 RP synthetic gear oil I ran and found other instances on the web were others believed this burned them too. I also blame back to back runs down the track which likely heat the gears up more than anything else on the car.
I had orange Motive gears too. I think you were also running too thick oil for race conditions.
Did you run synthetic gear oil?
Did you make back to back runs?