3.21 to 4.88. Differential carrier? - Jeep Wrangler Forum
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Old 11-13-2013, 06:50 AM   #1
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3.21 to 4.88. Differential carrier?

would I need a new carrier?

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Old 11-13-2013, 07:35 AM   #2
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in the front you do.

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Old 11-13-2013, 11:39 AM   #3
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The D35 front diff on Saharas and Sports does require the high speed carrier for anything above 3.21.
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Old 11-13-2013, 11:53 AM   #4
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front has a d30 and yes you need to change carriers.
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Old 11-13-2013, 12:06 PM   #5
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So it's not any bigger but "faster" ? How do I know the difference?
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Old 11-13-2013, 12:53 PM   #6
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Not sure what Spinlock meant by high speed carrier??? The new carrier is (slightly) bigger to accommodate the larger gears. Nothing to do with faster. They do look nearly identical but you will want a new carrier for sure.
Only necessary for 3.21s upfront.
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Old 11-13-2013, 01:23 PM   #7
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Dana 30 front axle carriers have a break at 3.54 anything under 3.54 ie the 3.21 has a different carrier then anything above 3.54 You need to be careful as older wranglers had low pinion diffs and they are not the same as the new high pinion diffs that we have on our jks.

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