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3rd Gen Ram Tech 2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

3.90 vs 3.92 gears

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Old 08-24-2013, 12:10 AM
Decion Decion is offline
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Join Date: May 2009
Posts: 14
Default 3.90 vs 3.92 gears

I ordered a 3.92 OEM gears and the provider said they did not have them anymore but sell a replacement set which when I received was a 3.90 set. I am only replacing the rear as they were damaged due to bearing failure. The 3.90 gear I received is 10 teeth on the pinion and 39 on the ring. I have a 4x4 with the stock 3.92 in the front. Is the 3.92 a 12 tooth pinion and 47 pinion? Would that be a problem when running 4x4? I use the 4x4 a considerable amount of time through out the year.

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Old 08-24-2013, 07:32 AM
Gone Fishin Gone Fishin is offline
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Join Date: Feb 2005
Vehicle: 2005 5.7,2500,G-56 6spd, 4x4,SB---2005 3500 Dually, 5.9, 4x4, NV5600 6spd, LB
Location: Bristol, IN
Posts: 2,199

try http://car-part.com/
they have oem 3.92's
used would be better than mixed
2005 Dodge Ram SLT 3500 Dually, 5.9 Cummins, 6sp NV5600, 11.5" LSD 4x4
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Old 08-24-2013, 07:32 AM

pinion, ratio, rear, ring

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