Break-In Period for Gears? - Northern California Ford Owners

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Posted by Pittsburg Mustang Owner (Member # 6100) on :

Well, tomorrow is the big day. I'm getting my gears installed by John B. I have an auto 04 GT and putting in FRPP 4.10s. What is the break in period?

I have heard of 2 cycles of 55 mph with a lil break period, and then I heard just drive it like you stole it from out of the shop.

Any input would be greatly appriciated!

[ November 19, 2005, 12:50 AM: Message edited by: Pittsburg Mustang Owner ]

Posted by tonster (Member # 6093) on :

bleh, no break in period whatsoever.

Posted by asskickn88 (Member # 4957) on :

Ask JohnB how to break them in. I did the pedal to the floor from day one and had noise on my first set. The set I have now JohnB installed for me. I drove easy for a couple hundered miles then changed the oil. For being Richmond gears they are really quiet. I would take it easy for a bit... [patriot]

Posted by PWR HNGRY 302 (Member # 6000) on :

Yea just ask JohnB he'll tell you. When I got my gears done he told that I didn't need to break them ,in since they were out of a nother car. But since yours are new I would take it slow for a couple hundred miles.

[ November 19, 2005, 12:09 PM: Message edited by: PWR HNGRY 302 ]

Posted by jordan_0806 (Member # 5888) on :

most companies recommend 4to500 miles but I think 2to300 is enough

Posted by Jmir018 (Member # 1414) on :

i'm not sure.. but i think rearend specialties tells you to brake them in for 1k.
I think you are not supposed to go pass a certain rpm for the x amount of miles.. etc etc...
I did this procedure and my gears are quiet as hell.. [patriot]

Posted by BlackNGold (Member # 655) on :

quote:
Originally posted by Jmir018:
i'm not sure.. but i think rearend specialties tells you to brake them in for 1k.
I think you are not supposed to go pass a certain rpm for the x amount of miles.. etc etc...
I did this procedure and my gears are quiet as hell..

The reason Rear End Specialties tells gives you a break-in period is to cover their own ass...They attempted to install 3.55's in my 94 twice and both times the gears had major "whine"....I ended up taking my car somewhere else...I know lots of other people that have had good luck with Rear End Specialties though...

If it's set up correctly you don't need to break em in...Put it this way, have you ever heard of brand new car owners breaking in their gears?...No, because from the factory they're set up correctly....

Just my .O2 [patriot]

Posted by tonster (Member # 6093) on :

do you break in a car after you buy it? no, that's why if the job is done right you wouldn't need a break in period. valley differentials didn't tell me i needed one and when i was planning on having done by johnb he said the same thing.

Posted by JohnB (Member # 969) on :

The only ones that truly need a break in is Motive gears. This is due to heat cycling them. I tell everyone I do gears for to have fun. [burnout]

Posted by Team SOLO (Member # 722) on :

I do not agree with breaking in gears. Others will disagree but I could care less. If you look at full on race cars, they don't do any 500 mile break ins before doing passes...and a drag car will be harder on a gear than any other type of car. Now, what JohnB said about Motive Gears might be true, however, Motive is also 'geared' towards drag racing and sponsors track events for some of the mid-west and east coast racing. If a break in was required, I find it 'Strange' (another brand of gears...hehehehe) that there is no true way to break in a set of gears for a drag car.

I have had gear changes the day of a street race with my old car. Hell, I had Haulinassmaro change the gears in my coupe twice on the day before hitting the track, pulling 1.3 sixty foots, and pulling single digit time slips....

Posted by red GT black rallyes (Member # 4495) on :

the local gear shop here says 100 miles, i think that its a good idea cuz if sumthin cums loose or sumthin there goes all that work, imo

Posted by green_fow_six (Member # 6063) on :

I've had my Motive's for over 100,000 miles without a break in period and they are still quiet. (knock on wood)

Posted by asskickn88 (Member # 4957) on :

quote:
Originally posted by Team SOLO:
I do not agree with breaking in gears. Others will disagree but I could care less. If you look at full on race cars, they don't do any 500 mile break ins before doing passes...and a drag car will be harder on a gear than any other type of car.

I think the break in process is just to keep the gears quiet. I put a set in our race car and it was full on from day one without a problem.... but who can hear noise from a rear end with 3" exhaust with 2 chamber flows that are dumped? [Big Grin]

Posted by stoauto (Member # 2803) on :

quote:
Originally posted by tonster:
bleh, no break in period whatsoever.

Posted by 94gt (Member # 3060) on :

quote:
Originally posted by JohnB:
The only ones that truly need a break in is Motive gears. This is due to heat cycling them. I tell everyone I do gears for to have fun.

GEAR MAN HAS SPOKEN! [patriot]

lol

Posted by Curt (Member # 6254) on :

From http://www.corral.net/tech/drivetrain/gears.html

Break-in period:

As with most highly stressed components, a break-in period is recommended to maximize part life; gears are no exception. While the "procedure" may differ between manufacturers, the "method" is the same. A semi-civil jaunt is taken to bring the gearset to operating temperature, and allowed to cool (stone cold); repeat as prescribed by the manufacturer (at most three times), prior to staging a burnout or wheelie contest, LOL!

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