question on new gears ( break in )

[BurnTire]

not talking about building a rear talking about that there is no need to breakin a rear end. I dont know anyone who actually has. Nobody ever had a problem either.

You break in the gears and I know many people that follow the break in procedure. Call DTS and ask them why it is best to do on a street driven car and report your findings back in this thread.

DTS are not the only people that recommend a heat cycle break in period. I have heard it for the past 20 years I have been playing with mustangs.

Do what you like with your car, but I followed the instructions from the pros.

[BurnTire]

From Richmond Gear
I guess the manufactures don't know what they are talking about.

http://www.richmondgear.com/01instructions.html

BREAK IN
A new ring and pinion installation, especially a high numeric ratio with new bearings, can cause an excessive heat buildup in the rear end and cause softening of the gear teeth and bearings if a break in is not performed.

Street vehicles should be driven at normal street driving speed for approximately 10 miles, then stop and let cool for 30 minutes. Do this 2 to 3 times. Towing vehicles need approximately 200-300 miles of normal street driving before being used for towing.
On circle track race cars make approximately 6 to 8 laps at slow speed, then let cool for 30 minutes. Make 6 to 8 more laps at slow speed, then 2 to 3 laps at full speed, the let cool again for 30 minutes.
Drag cars need only an initial run-in since they are driven short distances and heat is not normally a problem with proper lube and backlash allowance.
NOTE: If after the above break in is performed, overheating of the rear end is suspected, repeat the final portion of the break in procedures.

[Ruckus46gt]

From Richmond Gear
I guess the manufactures don't know what they are talking about.

http://www.richmondgear.com/01instructions.html

BREAK IN
A new ring and pinion installation, especially a high numeric ratio with new bearings, can cause an excessive heat buildup in the rear end and cause softening of the gear teeth and bearings if a break in is not performed.

Street vehicles should be driven at normal street driving speed for approximately 10 miles, then stop and let cool for 30 minutes. Do this 2 to 3 times. Towing vehicles need approximately 200-300 miles of normal street driving before being used for towing.
On circle track race cars make approximately 6 to 8 laps at slow speed, then let cool for 30 minutes. Make 6 to 8 more laps at slow speed, then 2 to 3 laps at full speed, the let cool again for 30 minutes.
Drag cars need only an initial run-in since they are driven short distances and heat is not normally a problem with proper lube and backlash allowance.
NOTE: If after the above break in is performed, overheating of the rear end is suspected, repeat the final portion of the break in procedures.

lol what if the shop is further then 10 miles away how do i get home? Track was 2 and a half hours away if i went to the close one the other was 4 hours and thats the one we would go to more often since we could rent it. That post also says nothing about changing the fluid like your first post. See even the experts dont agree

[BurnTire]

They all agree that there should be a few heat and cool down cycles.

[Ruckus46gt]

not for nothing a drag car trailed to the track with new gears doing a burnout, a full pass, and going back to the pits. That car is going to see the same temps at 20 minutes plus of driving at least. Companies have to cover there ass and the reason they say that is cause of the extra coating put on the rings since the gears sit for a long time before getting installed. It is recommended by a lot of people not to use synthetic gear oil right away

[BurnTire]

Read above. Drag car does not require the break in. This is for a street car.
There comes a time when one should stick his foot in his mouth. You have reached it.

[Ruckus46gt]

Read above. Drag car does not require the break in. This is for a street car.
There comes a time when one should stick his foot in his mouth. You have reached it.

yea they "do not require a break in", but will see the same rear end temps as a street driven car but will put more of a beating on the rear. So both rears will see the same temps, one will put way more of a beating on the ring but yet that one doesnt require a break in. Makes a lot of sense. Rear doesnt need a break in drive it normal go to the track you wont have any issues with it