NHRAMAN

iTrader: (1)

Jawsgear states new cars are reccomended to be broken in....I believe he is wrong...... [although it would be the wiser move,of course]

Jakes Dad

So, you guys are giving me permission. The next time anyone tests drives a Corvette or the new Camaro. To backhand them across the nose if they get on either of these NEW CARS, right?

Nothing new, I've been doing that for years. I've been selling vehicles on and off for four decades. I've never allowed anyone to abuse a car in my inventory until they owned it. I've felt it's not fair to the person buying a new car to drive an abused vehicle. Driving a new car is one thing. Abusing it is another....

Jakes Dad

chvycmaroz28

iTrader: (1)

its similar to breaking in a motor so the valves can seat

RealLiveMD

iTrader: (1)

Just be glad I haven't shown up at your dealership. Let's see, mustangs, camaros, 1 lotus, 1 vette, 1 cayman, 1 350, several pontiacs have all been abused by me

NekSnapr

Thanks for the info.. I've heard about breaking gears and new rear ends in before, but when I asked an old schooler, he said out off all the racecars and things he's had, that he never heard of it or did it and he hasn't had any whine. If I do anyswapping in, I'll be sure to try and break them in right.

RealLiveMD

iTrader: (1)

My oldschooler installer said the same. I'm at about 150miles and 7 heat cycles. I'm getting impatient. He even said that changing the oil wasn't that big of a deal because there is a magnet that catches the shavings. Furthermore, I didn't change my stock oil in over 77000 miles, launched on street tires with 400rwhp everyday, and never had a problem.

alamantia

iTrader: (10)

Again, its about the set up. Some people complain that their new 12 bolts come from the moser or strange quiet and after hard launches they whine. Thats because the shock of a launch upsets the preload on the pinion bearings not because of the gears themselves.

Irocem99

I'm laughing right now.. All the kiddies on here that have never owned a new car. So your going to buy a 2010 Camaro and pound on it right after you leave the dealer..Your a dumb SOB.. Just about anything mechanical has to be broken in..Its common sense. Jeff from Jaw Gears is right.. Stuff needs to get worn in and seat. If you beat on it and it doesn't break your lucky..Or its someone else's problem down the road. I've been driving my TA nice since the gear change..There are street guys and track guys..The track guys are going to tell you to punch it,the street guys are going to be more careful..I don't have the time and money to keep replacing gears.Its all personally preference.

Elliott's94Z

iTrader: (12)

Wow...a car salesman that actually cares...that's a first. Everyone of them I have delt with in test driving cars tells me to romp on it to see what it's got..lol

alamantia

iTrader: (10)

When an engine builder builds a $75,000 engine you would have to think they would be very careful with that investment correct? How much break in do you think they give the engine before its straped to the dyno....?

NONE

Once its up to operating temprature you make 8,000 RPM pulls.
Parts will seat themselves, just change the oil after.

NekSnapr

Yea but thats to seat the rings... Probably a little different than a rear end with a pinion and ring bearing seeing how they push against each other instead of like the rings where they just seat around the piston and push against a cylinder wall.

RealLiveMD

iTrader: (1)

Just figured out why gears don't get broken in. I'm on my way home and some old guy in a vette jumps out of parking lot screeching tires taunting me. This would never happen on any other day. I had to let him go since I decided to try to do at least one tank of gas which is about 13 heat cycles and 300 miles for me. I just picked this logic out of my *** and went with it. Thanks for all the input though..

odarabla

iTrader: (1)

Strange recommends a 1000 mile breakin period. Then change the fluid.

RealLiveMD

iTrader: (1)

Well, I think that you know what you're talking about. I waited 500 miles and as soon as I launched from second gear at thirty. The wine began. I'm pissed.
From quiet to eeeennnnnnn!!!!!!

1Bad00SS

iTrader: (2)

Think a real race car would be quite enough to hear a little gear whine?

jetlag

iTrader: (32)

Scott@DrivelineSolutions

iTrader: (22)

Always break in new gears, expecially if they are aftermarket. The aftermarket have a thicker fosfate coating on them since they might sit on the shelf for a longer period of time. OEM gears go right into an axle housing. They are lightly coated and yes the OEM uses a synthetic blend but also keep this in mind. Every axle is test ran before it goes into a vehicle. I'm not 100% sure how much run time are on them but at AAM I have seen NVH tested axle run for 15-30 minutes. After the OEM recieves them the vehicle is test driven on rollers so before the odometer is actually hooked up the motor has been ran, the transmissions has gone thru it's testing, the axle has been test ran and then they are parked or loaded into a train or car transport. If you have taken delivery of a new vehicle it does not have 0 miles on it, they always have 3-14 miles that I have seen. The OEM wouldn't let a noisy motor, trans, or axle out the door believe me.


As for the "drive it like you stole it" guys, good luck and we'll be seeing you returning soon.

01ssreda4

iTrader: (96)

Yeah, its EXACTLY like that except the rear end has no valves.

Trev_SS

iTrader: (17)

are you supposed to change the rear gear fluid after 500 miles? If so why?

green28

iTrader: (8)

I'm glad someone brought this one back, cause I'm gonna change gears in the spring and never thought about changing the fluid after a while. So which is it? I've read to change fluid after 500 and 1000 miles in this thread.