...another... 143,000...rebuilt motor...rebuilt transmission...new rearend. check his Son, 250,000 and 230,000..w/little or no maintance... http://www.startribune.com/business/129835803.html ......
the black coating on a new gear set is not a paint. its a lapping compound. its there to do the final lapping in of the gear set. the lapping process generates allot of heat. obviously a light weight vehicle like the maverick is not going to generate as much force on the gears as a full size truck but this process still generates heat. i have used a temp gun to monitor the process and a new gear set will run hotter than one with even 100 miles on it. if the manufacture of the gear set gives break in instructions and you feel that they dont know what they are talking about then thats your loss. i was answering the original question and it has become obvious that frank just likes to stir up the water. he knew he was not going to do any brake in and never will. i have presented the info that i know and its upto each person who reads this to decide if they will do the brake in or not.
you're right...I'm going to do it the way I do it...I was asking for what others do for...run in... this was a discussion of the different ways people do it/told to do it...not a right or wrong way...:Handshake so far we have from...0 hrs and 0 mins. to 8 hrs. and 30 mins. how long do you think this...lapping compound...stays on the mating surface of the teeth...why do they put it on the whole gear and the pinion shaft...
was asking of more ways, than opinions...:Handshake like...my owners man said........link my gear company said........link Ford said......in their shop man...link GM said........in their shop man...link ......
it's...obvious...to me...you think your way is the only way... obviously...there are a lot of different ways that are working that ain't like the 8.5 hrs you posted...
I do the jackstand thing forward and reverse, then the drive / cool down several times as described in my old Ford shop manual. BTW, the instruction sheet I got with my last set of Richmond gears gave the exact same procedure as the Ford manual. New hypoid gears have a lot of friction due to the way the gear surfaces slide on each other, but that's why they are so strong, lots of surface contact.
this is what i did (on my lift)...it looks the same... Quote: [FONT=Arial,Helvetica][SIZE=-1]Break-in Procedure - All vehicles and all applications:[/SIZE][/FONT][FONT=Arial,Helvetica][SIZE=-1]To break-in the installation, perform a run-in prior to driving with the rear wheels jacked up, operating at idle speed in high gear for a minimum of five (5) minutes. Then drive the vehicle 10 miles at a normal speed, let cool for one (1) hour and then repeat entire process again.[/SIZE][/FONT] http://www.metropartsmarket.com/rearend/warranty.html
How do you "drive" the car 10 miles on a lift? LOL I think their intention is to put a slight load on the gears during the drive.
this is what i did (on my lift)...it looks the same... Quote: Break-in Procedure - All vehicles and all applications:To break-in the installation, perform a run-in prior to driving with the rear wheels jacked up, operating at idle speed in high gear for a minimum of five (5) minutes. Then drive the vehicle 10 miles at a normal speed, let cool for one (1) hour and then repeat entire process again. http://www.metropartsmarket.com/rearend/warranty.html So, after all this arguing and 5 pages of nit-picking, you actually DID do a break-in. Geez
How do you "drive" the car 10 miles on a lift? LOL I think their intention is to put a slight load on the gears during the drive. the same way you put 10 miles on the jackstands with a load on it...
