PT.net Gear Install How-To
05-27-2012, 02:24 PM
#42
TECH Fanatic
iTrader: (4)
Join Date: Nov 2008
Location: Houston
Posts: 1,691
Likes: 0
Received 0 Likes
on
0 Posts
BREAK-IN PROCEDURES
1. NO hard acceleration.
2. NO heavy hauling.
3. NO heavy towing.
4. NO driving over 60 mph.
Once the gears are installed, drive the vehicle for about 30 minutes while keeping the "NO" list above in mind. After 30 minutes, park and let the differential cool completely. This initial break-in is very important. After the differential is cooled continue the break-in with the "NO" list in mind for 500 miles. After 500 miles, change the gear oil and have fun.
1. NO hard acceleration.
2. NO heavy hauling.
3. NO heavy towing.
4. NO driving over 60 mph.
Once the gears are installed, drive the vehicle for about 30 minutes while keeping the "NO" list above in mind. After 30 minutes, park and let the differential cool completely. This initial break-in is very important. After the differential is cooled continue the break-in with the "NO" list in mind for 500 miles. After 500 miles, change the gear oil and have fun.
I'm picking up my truck today with the new 4.56s.
06-16-2012, 07:15 PM
#44
How in the HELL are you guys crushing the crush sleeve. I tried everything. I tried putting the floor jack under the breaker bar and using it to push up to tighten the nut. I even went and got a impact gun rated at 580 ft-lbs, turned it up to 130 psi, and nada. So I reused the stock crush sleeve and it seems to be working okay.
And this writeup says to use 3 quarts of gear oil. I could only fit in 2, then another half quart after a quick test drive, so 2.5 total. This was to the bottom of the filler hole, not the 15-40mm lower like recommended. Perhaps my pinion is rotated down lower than yours. I have 6* shims on mine.
And this writeup says to use 3 quarts of gear oil. I could only fit in 2, then another half quart after a quick test drive, so 2.5 total. This was to the bottom of the filler hole, not the 15-40mm lower like recommended. Perhaps my pinion is rotated down lower than yours. I have 6* shims on mine.
06-17-2012, 02:34 AM
#48
My Snap on MG725 is rated at 810 FT LB of working torque. As mentioned, It takes some doing but mine did the Job were others failed. We were not able to start crushing it any other way.
Believe me, we tried putting a 4ft cheater bar on a 2 foot breaker bar and barely moved it...
Believe me, we tried putting a 4ft cheater bar on a 2 foot breaker bar and barely moved it...
03-18-2013, 03:01 PM
#49
Thanks for the write up! I used this for my truetrac/4.10 install. I had to use the shims that came with my master install kit because the trutrac posi was too large to acomodate the factory shims. Took me three hours to get backlash right 
! I see why shops charge so much for this. Double the traction makes it all worth it!
! I see why shops charge so much for this. Double the traction makes it all worth it!
05-13-2013, 07:51 AM
#50
Registered User
!["SinnPushrr"'s Avatar](data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><circle class='avatar-circle-default' fill='%2357389d' cx='25px' cy='25px' r='20px'></circle><text class='avatar-text-default' x='49%' y='53%' fill='white' text-anchor='middle' alignment-baseline='middle'>"</text></svg>)
Join Date: Apr 2013
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for the write up! I used this for my truetrac/4.10 install. I had to use the shims that came with my master install kit because the trutrac posi was too large to acomodate the factory shims. Took me three hours to get backlash right ! I see why shops charge so much for this. Double the traction makes it all worth it!
! I see why shops charge so much for this. Double the traction makes it all worth it!