9.25" rear Chrysler Patterns for 03 Ram 1500

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New Mechanic

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Ram Year
2003
Engine
Hemi 5.7 liter
Hello everyone,

I'm hoping that someone experienced with rebuilding differentials can help me at interpreting my latest patterns. This is my first attempt at rebuilding one myself, and any expertise is greatly appreciated. Thank you.

Current Specifications:

Pinion shim height is .025"
Pinion bearing preload is at 15 in-lbs (Without crush sleeve and oil seal installed)

Ring gear carrier backlash is .007" and the adjustment screws are torqued to 75 ft-lbs.

P.S.
I've read that patterns under work-load will stretch out toward the heel, so it is best to be either perfectly centered or nearer toward the toe, is this true?
 

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pickupman66

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Last edited:

Tach_tech

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I've rebuilt a lot of diffs, and while that pattern is not picture perfect, the drive/coast side is a little close to the toe. However it's pretty good, I wouldn't hesitate to send that out the door in a customers vehicle or run it on my own, providing it's not noisy which as long as everything is done correctly, it shouldn't be.
 
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New Mechanic

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Ram Year
2003
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Hemi 5.7 liter
Thank you for the Links and advise. I'm going to attempt to better center the drive pattern by increasing my backlash. I'll post photos of my progress. Also, have you ever heard of a competition contact pattern? Alloy USA depicts it as an acceptable pattern though I'm not certain as to what advantage it would have. Thanks Again.

Here's the Alloy USA link I am referring to: Gearing Contact Patterns
 
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