mainly my questions include break in procedure... what should i do to break in the 3.73's keep in mind they are used though not brand new but any ideas would be great thanks...
3.73's installed.. few questions though
- Thread starter Chin
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mo_dingo
Dirt-Old 20+Year Member
Chin said:
As long as you used the same shims and they were installed correctly, I wouldn't worry about breaking them in.
But if you replaced your bearings, I wouldn't spin them too high. Keep your speed under 55 or so for a couple days.
You didn't forget to add friction modifier, right?
Scott
CBZGT50
New Member
I just drove mine nicely for a few days to settle. Otherwise you really don't have to break them in. If there are no noises now, your perfectly set up.
OL' WHITEY
New Member
Give 'em 100 miles with no hard launches and no burnouts. After that, you'll know if something's wrong.
89MustangGX
I have nothing productive to add!
Heat cycling is the only break in I've ever really heard of. Drive them a little and let them cool -- do this a few times. After that, they're good to go! 
Some people don't even wait for that!
Some people don't even wait for that!
mo_dingo
Dirt-Old 20+Year Member
Since they are used gears, they have already been "broken in". I wouldn't worry too much about it.
Scott
Scott
my 3.73s whine a lil under acceleration...always have since i had them installed....even though the guy did em really cheap it still worries me that they will have to be replaced one day....hands down it has 2 be the best mod ive done 2 my car to date...really woke it up cant imagine puttin the factory ones back in...let me know what you guys think...how long will they last and is it dangerous 2 drive this way
mo_dingo
Dirt-Old 20+Year Member
golfpro187ho said:
They probably didn't change the shims and just swapped the gears. Take it to a shop before you break a gear.
Scott
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