Breaking in new gears!

mysweetlx · 06-18-2002, 03:37 PM

I've heard people say there is no break in period for new gears, I've heard others say they must be broken in. All I know is that I'm getting my new 3.73's soon, and I need to know what I need to do in order to have them last and not have them whine like one of my friends does. What's the proceedure? Do I need to vary speed, keep it under a certain speed, not spin tires for x amount of miles? How long is this break in period? Please let me know the right way to do this! Thanks.

Smokedawg · 06-18-2002, 03:41 PM

I have heard people say to drive it for 10 minutes then let them cool for 10 minutes...Do that process at least 2-3 times.

How I broke in my first set of gears which are still in the car:

Rev to 4,000rpm, dump the clutch and dont shift til you hit the red-line in 1st, 2nd, and 3rd...

Hethj7 · 06-18-2002, 08:24 PM

I just drove mine normally to break them in. But, man the first day and a half or so they were very noisy. It sounded like my whole rear end was going to fall out. I guess it takes a while for the friction modifier to get worked around in the differential. Enjoy your new gears!

fiveohpatrol · 06-19-2002, 01:55 AM

Quote:

Rev to 4,000rpm, dump the clutch and dont shift til you hit the red-line in 1st, 2nd, and 3rd...

LMFAO, HELLL YAHHHHH!!! thats what I'm talkin about

seriously though, I just drove mine on the highway about 20-30 minutes, as I was told by the mechanic that installed them.
No whine whatsoever from them in 3 years.

HiFlow5 0 · 06-19-2002, 06:49 AM

Heres what I got from the shop when they installed my gears.

mysweetlx · 06-19-2002, 11:42 AM

Guys, you've been very helpful. I'm not quite sure I feel comfortable just driving normally from the get-go though. I think I'll probably take it easy ad follow that break in schedule from hiflow5.0's shop.......sounds good to me!

06-18-2002, 03:37 PM	#1
mysweetlx Registered Member Join Date: Apr 2002 Location: New York Posts: 248	Breaking in new gears! I've heard people say there is no break in period for new gears, I've heard others say they must be broken in. All I know is that I'm getting my new 3.73's soon, and I need to know what I need to do in order to have them last and not have them whine like one of my friends does. What's the proceedure? Do I need to vary speed, keep it under a certain speed, not spin tires for x amount of miles? How long is this break in period? Please let me know the right way to do this! Thanks. __________________ Damn this thing's fast!

06-18-2002, 03:41 PM	#2
Smokedawg Tires Fear Me... Join Date: Jan 2001 Posts: 867	I have heard people say to drive it for 10 minutes then let them cool for 10 minutes...Do that process at least 2-3 times. How I broke in my first set of gears which are still in the car: Rev to 4,000rpm, dump the clutch and dont shift til you hit the red-line in 1st, 2nd, and 3rd... __________________ 1990 Mustang GT- 347 Stroker-Tremec 3550-Compucar Nitrous, AFR, Systemax Intake, AFM, 30lbers, 70MM TB, 76mm MAF, full suspension and lots more 1995 Chevy S-10 406 SBC, Dual tunnel ram, Dart heads, Nitrous, full tub, 4-link, adjustable drag shocks, coil-overs, 9in rearend, 4.56 gears...etc

06-18-2002, 08:24 PM	#3
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	I just drove mine normally to break them in. But, man the first day and a half or so they were very noisy. It sounded like my whole rear end was going to fall out. I guess it takes a while for the friction modifier to get worked around in the differential. Enjoy your new gears! __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

06-19-2002, 11:42 AM	#6
mysweetlx Registered Member Join Date: Apr 2002 Location: New York Posts: 248	Guys, you've been very helpful. I'm not quite sure I feel comfortable just driving normally from the get-go though. I think I'll probably take it easy ad follow that break in schedule from hiflow5.0's shop.......sounds good to me! __________________ Damn this thing's fast!

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