Rear end question... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ScottG · 05-03-2012, 06:03 PM

I have a '67 3/4 ton w/ an Eaton rear end. Supposedly has 5.13 gears. Anyways, on occasion, when taking off from a stop, I get a LOUD banging noise from the rear, and the rear end lifts like it ran something over. Anyone have this same experience? Hope I'm explaining this right.

ScottG · 05-03-2012, 06:10 PM

I forgot a few details. It's a no-slip diff, 4 sp. granny. U-joints are good. Center support is shot.

Gumby · 05-03-2012, 07:04 PM

just trying to wrap my brain around it, for the rear end to be "lifting it" something inside it binds or jams up and the engine torque twist the thing to cause the lift feel but always lets lose???

ScottG · 05-03-2012, 09:00 PM

Exactly. Feels like it happens on the driver's side only too. Bangs first, then the "lift".

jfortvalley · 05-03-2012, 10:12 PM

posi unit is having issues

**Captainfab** · 05-04-2012, 12:33 AM

It could be an issue with the Detroit Locker, or it could be your driveshaft jumping around since you say the carrier bearing is shot. The Detroit Lockers are known for being noisy, but the jumping part isn't good. If it were me, I would be looking into switching to either a 10.5 14 bolt, or a Dana 60 with some better gears, and better parts availability.

05-03-2012, 06:03 PM	#1
ScottG Registered User Join Date: Feb 2012 Location: Ventura,Ca Posts: 745	Rear end question... I have a '67 3/4 ton w/ an Eaton rear end. Supposedly has 5.13 gears. Anyways, on occasion, when taking off from a stop, I get a LOUD banging noise from the rear, and the rear end lifts like it ran something over. Anyone have this same experience? Hope I'm explaining this right. __________________ '67 C20 LBW

05-03-2012, 06:10 PM	#2
ScottG Registered User Join Date: Feb 2012 Location: Ventura,Ca Posts: 745	Re: Rear end question... I forgot a few details. It's a no-slip diff, 4 sp. granny. U-joints are good. Center support is shot. __________________ '67 C20 LBW

05-03-2012, 07:04 PM	#3
Gumby Registered User Join Date: Dec 2008 Location: NW-Ohio Posts: 2,525	Re: Rear end question... just trying to wrap my brain around it, for the rear end to be "lifting it" something inside it binds or jams up and the engine torque twist the thing to cause the lift feel but always lets lose???

05-03-2012, 09:00 PM	#4
ScottG Registered User Join Date: Feb 2012 Location: Ventura,Ca Posts: 745	Re: Rear end question... Exactly. Feels like it happens on the driver's side only too. Bangs first, then the "lift". __________________ '67 C20 LBW

05-03-2012, 10:12 PM	#5
jfortvalley Registered User Join Date: Mar 2012 Location: fortvalley ga Posts: 345	Re: Rear end question... posi unit is having issues

05-04-2012, 12:33 AM	#6
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: Rear end question... It could be an issue with the Detroit Locker, or it could be your driveshaft jumping around since you say the carrier bearing is shot. The Detroit Lockers are known for being noisy, but the jumping part isn't good. If it were me, I would be looking into switching to either a 10.5 14 bolt, or a Dana 60 with some better gears, and better parts availability. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

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