Carrier bearing insulator ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Dan-K · 12-24-2023, 11:48 AM

Has anyone ever put a thin piece of rubber between the carrier bearing where it mounts to the frame ? Cant see where this would hurt anything and may cut down vibration etc. Your thoughts ?

**Steeveedee** · 12-24-2023, 01:21 PM

I think that re-balancing the driveshaft would be a better option, if there is vibration from it. It already has a neoprene doughnut between the bearing and the pedestal mount.

**HO455** · 12-24-2023, 02:34 PM

If the drive shaft components are in good shape and the U-joint angles in specification there should be no noticeable vibration.

You may end up causing problems down the road if the rubber allows the carrier to move around under high load conditions.

In today's vehicles with NVH being a priority I've not seen any OE rubber mount the carrier bearing. The rubber bushing in the carrier bearing is supposed to absorb normal vibration.

**425HP409** · 12-24-2023, 09:55 PM

For those of you that use a center carrier with a 2 piece small block driveshaft, showcars.com has one with a polyurethane bushing. It is their part #6668.it fits cars 58-64 and trucks with a 2 piece driveshaft, except some big blocks. I had a problem with vibration on hard acceleration on a 63 Impala with a 327. The #6668 fixed it.

12-24-2023, 11:48 AM	#1
Dan-K Registered User Join Date: Aug 2009 Location: Ft.Collins, Co. Posts: 104	Carrier bearing insulator ? Has anyone ever put a thin piece of rubber between the carrier bearing where it mounts to the frame ? Cant see where this would hurt anything and may cut down vibration etc. Your thoughts ?

12-24-2023, 01:21 PM	#2
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,676	Re: Carrier bearing insulator ? I think that re-balancing the driveshaft would be a better option, if there is vibration from it. It already has a neoprene doughnut between the bearing and the pedestal mount. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

12-24-2023, 02:34 PM	#3
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,350	Re: Carrier bearing insulator ? If the drive shaft components are in good shape and the U-joint angles in specification there should be no noticeable vibration. You may end up causing problems down the road if the rubber allows the carrier to move around under high load conditions. In today's vehicles with NVH being a priority I've not seen any OE rubber mount the carrier bearing. The rubber bushing in the carrier bearing is supposed to absorb normal vibration. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

12-24-2023, 09:55 PM	#4
425HP409 425hp409 Join Date: Oct 2008 Location: Prosper Texas Posts: 841	Re: Carrier bearing insulator ? For those of you that use a center carrier with a 2 piece small block driveshaft, showcars.com has one with a polyurethane bushing. It is their part #6668.it fits cars 58-64 and trucks with a 2 piece driveshaft, except some big blocks. I had a problem with vibration on hard acceleration on a 63 Impala with a 327. The #6668 fixed it. __________________ Charles 68 SWB, Dad bought new, now 396 & factory ac 64 Impala SS, 409 425HP, 4 speed AC 64 Bel Air Wagon, 400 Small Block 57 Bel Air all original 283 w/Factory Air 77 GMC Sprint, 454/425HP 67 Olds 442, all original 90 ZR1 Corvette



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