Parts I.D. help please..

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**WILMASBOYL78** · #1 06-21-2009, 09:11 PM

Getting some ready for GM....need a little help with some items:

water pump pulley BB 3874416 BR

crank pulley BB 3876844 BU

power steering pump bracket 3987422

frame mount for engine 3980942

??? what is the difference between the 30140 12 bolt posi carrier and a 30174 unit....they both look the same to me.

I have a set of 4.10 gears...ring gear 3862526 pinion 3862514 are these std items or something special...??

thanks, wilma

**Fast67VelleN2O** · #2 06-22-2009, 01:25 AM

[ QUOTE ]

??? what is the difference between the 30140 12 bolt posi carrier and a 30174 unit....they both look the same to me.

[/ QUOTE ]

Wilma,
140 is a 3 series unit (3.08-3.73), 174 is a 4 series unit (4.10 and up).

-Matt

**WILMASBOYL78** · #3 06-22-2009, 01:48 AM

Thanks....what about those gears..?? are they regular parts or the special hardened stuff..??

here are a couple more items:

power steering pulley 3860457 CV

crank pulley #95000xx this part has a deep offset...sitting flat it measures about 4" deep

many thanks to anyone who can help me with this stuff...tw

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