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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: zieg85 on October 01, 2010, 08:16:18 AM

Title: Corporate 14 bolt
Post by: zieg85 on October 01, 2010, 08:16:18 AM

My new toy has a 4.56 Gov-loc in it.  I would like to change the gears out but retain the G-80 carrier.  Question is what is the highest gear that will work for the carrier? 

Title: Re: Corporate 14 bolt
Post by: Da67goatman on October 01, 2010, 09:23:57 AM

On your carrier 4.56-5.38 the other carrier is 4.10-3.23.

Title: Re: Corporate 14 bolt
Post by: zieg85 on October 01, 2010, 11:00:36 AM

Thanks for the info, looks like I need another carrier if I want to go down in ratio.

Title: Re: Corporate 14 bolt
Post by: VileZambonie on October 01, 2010, 12:45:59 PM

Leave the 4.56 and ditch the th400 for a 700r4

Title: Re: Corporate 14 bolt
Post by: zieg85 on October 01, 2010, 01:59:34 PM

Quote from: VileZambonie on October 01, 2010, 12:45:59 PM

Leave the 4.56 and ditch the th400 for a 700r4

I am leaning toward that way Vile since the TH400 is very loud in first and reverse, has a weird whirling noise that winds down going into park from reverse.  I have to find a reputable shop to rebuild me one.  My 1986 parts truck has a 700R4 in it however it probably needs to be updated.  Long term it will see towing a 5th wheel camper.