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04-20-2014, 11:59 AM | #1 |
Senior Member
Join Date: Jun 2009
Location: Phoenix AZ
Posts: 4,564
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HELP! What series is my posi unit?
This is a gov lock 12 bolt posi unit with 3.08 gears. I know a lot of people aren't fans of these and I am not looking for comments on how good or not good they are. I have just been doing a lot of searching and can't get a definitive answer on what gears will fit. I think it will fit up to 3.42 but am not sure. This isn't the answer I am hoping for as I really want 3.73 gears. Any positive input would be appreciated.
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AZPartsLocators on Instagram 1972 Cheyenne Super Short Bed big block "Blackie" 1977 Crew Cab GMC Short bed with 4BT Intercooled Cummins Diesel and a 4L80e "The Junkyard Dog" 1985 Crew Cab Chevy dually with 5.9 Cummins "The Big Dog" This is what my dad liked to be called by the grandkids before he passed so it seems fitting for his old truck. |
04-20-2014, 07:04 PM | #2 |
Registered User
Join Date: Jul 2007
Location: Ontario Canada
Posts: 1,006
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Re: HELP! What series is my posi unit?
Yes, 3:42, but there are a few manufacturers that make thick gears for a series 3 carrier.
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1985 C10 2004 Avalanche |
04-21-2014, 07:30 AM | #3 |
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Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: HELP! What series is my posi unit?
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04-21-2014, 10:26 AM | #4 | ||
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
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Re: HELP! What series is my posi unit?
Quote:
Quote:
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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04-21-2014, 10:57 AM | #5 |
Senior Member
Join Date: Jun 2009
Location: Phoenix AZ
Posts: 4,564
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Re: HELP! What series is my posi unit?
Thanks for all of the input. These are the answers I was looking for!
__________________
AZPartsLocators on Instagram 1972 Cheyenne Super Short Bed big block "Blackie" 1977 Crew Cab GMC Short bed with 4BT Intercooled Cummins Diesel and a 4L80e "The Junkyard Dog" 1985 Crew Cab Chevy dually with 5.9 Cummins "The Big Dog" This is what my dad liked to be called by the grandkids before he passed so it seems fitting for his old truck. |
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