Gear Break in????

matt07gt

matt07gt

Senior Advisor
#1
#1
Monday I am getting my 4.10's installed :rock:....so once they are installed whats the best deal to break them in? I have read that FRPP do not need to be broken in......but than I have also heard that they need to be broken in for 200 miles or so.

Also...whats this I see that I should change the gear oil after 500 miles? RP gear oil is expensive :nono:
 
Timspony

Timspony

Capital District Coordinator / Super Moderator
NYM Staff
#5
#5
...You Do NOT have to change the gear oil again!! :nono: ...at least for another 25k miles! :)
 
KHvistagt

KHvistagt

Well-Known Member
#12
#12
Rev car to 4000rpm, put in first gear and release clutch. Sit back and enjoy. Thats how I broke mine in.:D Just kidding. I did not break them in though. I used the ford sythetic gear oil that manufacturer recommends.
 
Unrealford

Unrealford

Well-Known Member
#13
#13
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
 
Aetos

Aetos

2010 Thread Jacker
#14
#14
Unrealford said:
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
Click to expand...
Yup, I've always read(atleast for the 9") that 2-3 full heat cycles/cool downs should be done with regular driving before you abuse it

Drive to full operating temp. Let car cool down completely, Rinse and repeat 3x.

Better safe than sorry :confused:
 
matt07gt

matt07gt

Senior Advisor
#16
#16
Im pushing back my install date for a few days. Someone broke into my car and stole my wallet...which had the install money, all my CC's, lisc, etc.....so once all of that is straightened out again i'll be going to the shop for the install.
 
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