Did They REALLY install my 4.10's? PLEASE HELP
06-27-2010, 05:44 PM
#41
That makes no sense on the cool down periods.
In order to have a cool down period of 6 hrs you would have to have a point in which to START the cool down period. Meaning you drive so far THEN have it cool down for 6 hrs.
This would make sense as an example.... 500 mi of total calm driving for break in.
Drive no more than 100 mi then have a cool down period of 6 hours in between each 100 mi.
Just saying 3 cool down periods but no max time driving in between says bad instructions to me.
In order to have a cool down period of 6 hrs you would have to have a point in which to START the cool down period. Meaning you drive so far THEN have it cool down for 6 hrs.
This would make sense as an example.... 500 mi of total calm driving for break in.
Drive no more than 100 mi then have a cool down period of 6 hours in between each 100 mi.
Just saying 3 cool down periods but no max time driving in between says bad instructions to me.
06-27-2010, 05:54 PM
#42
Join Date: Jun 2010
Location: New York
Posts: 26
I don't think you understand the concept. The thing is you drive for about 15 min, enough for the gear and oil to get hot, then you let it cool down. Whether you have the time to do it or not is your own problem. Depends on if you want your gears to function properly or not. Again that is a precaution but it helps reduce any risks of ruining your gears. It does not consist of X amount of miles at this point. You take it easy for about 500 miles in total to slowly wean in your new gear set. That is what my installer told me and that's who I'll trust. Just enjoy your gears man, it's pointless now, you can't go back in time. Now you know for the future.
06-28-2010, 03:20 PM
#45
The Paranoid One
Join Date: Apr 2006
Location: Texas
Posts: 5,320
06-28-2010, 05:38 PM
#46
Join Date: Jun 2010
Location: New York
Posts: 26
I asked that very same question and I was told that aftermarket gears are in some way different than the gears that come in brand new cars. I'm not sure if it's the material they are made out of or the process in which they are produced. Either way, I can tell you that not heat cycling a set of new gears will result in serious rear end noise and a very short life.
06-28-2010, 09:13 PM
#47
2nd Gear Member
Join Date: Jan 2005
Location:
Posts: 482
I asked that very same question and I was told that aftermarket gears are in some way different than the gears that come in brand new cars. I'm not sure if it's the material they are made out of or the process in which they are produced. Either way, I can tell you that not heat cycling a set of new gears will result in serious rear end noise and a very short life.
06-29-2010, 11:45 AM
#48
Join Date: Jun 2010
Location: New York
Posts: 26
This is the only one I have video of. Not a Mustang but aftermarket gears none the less. Gears were installed and the car was driven 20 miles to the dyno to be tuned. Rear end made no noise before it was put on the dyno. I hour later this is the whine it made. You will hear it twards the end of the video. Gear set number 2 was installed and broke in properly and makes no noise.
http://s139.photobucket.com/albums/q...rent=007-1.flv
http://s139.photobucket.com/albums/q...rent=007-1.flv
06-29-2010, 11:48 AM
#49
The Paranoid One
Join Date: Apr 2006
Location: Texas
Posts: 5,320
So you automatically attune it to the dyno?
How do you know it is not from the install not being quite on spot or the gears themselves or the bearings?
How do you know to attribute it to the dyno causing it FOR SURE?
Just because it made no whine before the dyno does not mean the noise could show up a little later and it not be from the dyno.
How many gear jobs have been done and cars been put on the dyno and run
and in order to tune for this or that and the gears have absolutely no whine at all? I'd say many.
How do you know it is not from the install not being quite on spot or the gears themselves or the bearings?
How do you know to attribute it to the dyno causing it FOR SURE?
Just because it made no whine before the dyno does not mean the noise could show up a little later and it not be from the dyno.
How many gear jobs have been done and cars been put on the dyno and run
and in order to tune for this or that and the gears have absolutely no whine at all? I'd say many.
Last edited by Blacksmoke; 06-29-2010 at 11:51 AM.
06-29-2010, 11:56 AM
#50
Join Date: Jun 2010
Location: New York
Posts: 26
I would have no way to tell if it was a direct result of improper install or improper break in. However, the rearend was removed and sent to RPM Transmissions in Daleville Indiana and THEY have all the experiance and equipment to be VERY SURE it was a result of improper break in, or so that's what they told me.