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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 01-21-2014, 08:29 PM
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Default 4:56 gears

What all needs to be done to the zf rearend to accept 4:56 gears?and can i still run the factory lsd for the zf rearend?
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Old 01-22-2014, 03:41 PM
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The carrier needs to be machined(drilled) to accept the aftermarket bolt pattern. Yes you can do this to the factory lsd. I went with the stock 4.10s because I didnt want so many hole in my new diff. But plenty of guys have dove it. This is for the rear, I have no idea what you have to do to the front.
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Old 01-22-2014, 04:05 PM
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Quote:
Originally Posted by jerseymike View Post
The carrier needs to be machined(drilled) to accept the aftermarket bolt pattern. Yes you can do this to the factory lsd. I went with the stock 4.10s because I didnt want so many hole in my new diff. But plenty of guys have dove it. This is for the rear, I have no idea what you have to do to the front.
Did you have this dealer installed or did you buy the stock gears and take it to another shop? Since they are the stock gears I am assuming labor would be less intensive... as you stated there would not to be any new/as many new holes.
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Old 01-22-2014, 07:39 PM
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Quote:
Originally Posted by jerseymike View Post
The carrier needs to be machined(drilled) to accept the aftermarket bolt pattern. Yes you can do this to the factory lsd. I went with the stock 4.10s because I didnt want so many hole in my new diff. But plenty of guys have dove it. This is for the rear, I have no idea what you have to do to the front.
I only have to order the gear and installation package for the front..the front didnt change till 12 or 13
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Old 01-23-2014, 12:51 AM
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Quote:
Originally Posted by BlkXpress25 View Post
Did you have this dealer installed or did you buy the stock gears and take it to another shop? Since they are the stock gears I am assuming labor would be less intensive... as you stated there would not to be any new/as many new holes.
I bought the gears then had it done at a 4x4 shop that has been doing gears for 25 years. It was 350+ oil and he was done by noon. Works great. The factory gears are very quiet. I hear some of the aftermarket gears wine.
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Old 01-23-2014, 12:55 AM
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Quote:
Originally Posted by TBILLIOT View Post
What all needs to be done to the zf rearend to accept 4:56 gears?and can i still run the factory lsd for the zf rearend?
So do you already have a LSD and just need gears?
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Old 01-23-2014, 10:27 AM
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[QUOTE=jerseymike;1305093]So do you already have a LSD and just need gears?[/

I have it but its not installed yet i been deciding on what gears i wanted..i was going to go with factory 4:10's but im leaning more towards 4:56's
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Old 01-23-2014, 12:54 PM
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Well that makes it easier. You can check with local machine shops and see what they would charge to drill a new bolt pattern into the diff, then get the new 4.56 gears and let them drill the correct pattern. At least your truck wont be down through the process and the cost of the gears at 200 verses 600 for oem will pay for the machine work. I have had good luck getting things done with local guys that know what they are doing. Like the 4x4 shop that did the install for 350 and a torque converter guy that restalled my stock tc to 2600 rpms for only 175.
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Old 01-23-2014, 01:50 PM
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Quote:
Originally Posted by jerseymike View Post
Well that makes it easier. You can check with local machine shops and see what they would charge to drill a new bolt pattern into the diff, then get the new 4.56 gears and let them drill the correct pattern. At least your truck wont be down through the process and the cost of the gears at 200 verses 600 for oem will pay for the machine work. I have had good luck getting things done with local guys that know what they are doing. Like the 4x4 shop that did the install for 350 and a torque converter guy that restalled my stock tc to 2600 rpms for only 175.
Yea thats what im probably going to do..i just have to find a machine that'll want to do it..damn thats a good price they charge for that
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