Duramax Diesels Forum Truck of the Week
  #61  
Old 03-30-2018, 07:30 AM
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Chevy1925 Chevy1925 is offline
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factory gears always setup the best imho but ive never had much issue with Yukons. i just setup a set of used yukon 5.13 gears for my ford 8.8 going from stock 3.73. only needed .004 more pinion depth and off set the ring gear to the driver side .0012 from factory shims. pattern is dead nuts center and great depth into the tooth. to get a used gear to setup like that is hard to come by.
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  #62  
Old 03-30-2018, 09:05 AM
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Originally Posted by jpowel29 View Post
Any noticeable differences between the Yukon gears vs going back with the AAM gears - as far as quality/durability and gear set-up?

I've run the Yukon 4.56 and 3.73 gears in other set-ups. Was thinking about getting AAM if I decide to do this swap.
AAM are stronger. Sled pullers have proven this but unfortunately aam has discontinued the ratios most commonly used in pulling. I think they still make 3.42 3.73 & 4.10

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  #63  
Old 03-30-2018, 09:11 AM
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Quote:
Originally Posted by ikeG View Post
AAM are stronger. Sled pullers have proven this but unfortunately aam has discontinued the ratios most commonly used in pulling. I think they still make 3.42 3.73 & 4.10

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i dont think strength will be the issue in a 3.42. pinion is getting larger and still plenty of meat on the ring gear. under 3.0 might be an issue. i could definitely see where the AAM are stronger in a sled pull in the 4.56 gear ratios.
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Mike L is my role model. I want to be like him when I grow up.
James

02 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
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  #64  
Old 10-24-2018, 04:38 AM
tanlly tanlly is offline
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I donít really post much but Iíve decided to take on this project of 3.42 ratio change. I successfully replace the rear axle ratio. Iím and struggling with my front diff figment. Does anyone have any suggestions? If I need to I can start my own thread. I donít mean to hijack this thread.
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  #65  
Old 10-24-2018, 08:46 PM
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Please explain with more details on the trouble you are having
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  #66  
Old 10-25-2018, 03:38 AM
tanlly tanlly is offline
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I setup the pinion in the housing to proper spec with no pinion shims installed. I have my passenger side adjust backed all the way out. Set the carrier into the drivers side housing, set the drivers side housing down on the other case half, I tighten bolts down to bring case halves together evenly and I get to about a 1/16 inch gap and my pinion gets outrageously tight to where I canít spin the pinion with the yoke on it by hand. I can attach photos
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  #67  
Old 10-25-2018, 06:45 AM
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B1352376-2B23-4E51-9F20-B57C65A28CA9.jpg

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6FF22CB3-3B74-46D3-8735-80157165C9A8.jpg

F27F6A72-934F-4E0A-A0BB-CBAC3619BD25.jpeg
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  #68  
Old 10-25-2018, 07:04 AM
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Have you tried loosening the driver's side adjuster?
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  #69  
Old 10-25-2018, 08:44 AM
tanlly tanlly is offline
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I can loosen it but it seems to only allow the carrier to twist and become offset in the housing. So to sum it up it does not allow me to completely bring the housing together nor does it free up the pinion.
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