D44 carrier - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**D.PASSMORE** · 10-09-2012, 08:42 PM

Question: Is a D44 carrier the same for different gear sets? I'm changing from a 3.08 to a 4.09. I know a chevy 12 bolts have different size carriers - splits at 3.73 up for trucks. Thanks

Redcap · 10-09-2012, 09:29 PM

http://www.differentials.com/technic...carrier-breaks

**D.PASSMORE** · 10-09-2012, 09:48 PM

Thanks, I felt it did, just didn't know where. Now to find one...

Redcap · 10-09-2012, 11:08 PM

Quote:

Originally Posted by D.PASSMORE

Thanks, I felt it did, just didn't know where. Now to find one...

I couldn't remember where the carrier break was either.

wilkin250r · 10-10-2012, 06:54 PM

Interesting. For some reason, I had thought the carrier break on a D44 was at 4.10, but I am probably just confusing that with my rear axle.

The reason for the carrier break is that as you gear lower and lower (higher numbers, 4.10, 4.56, 4.88) the pinion gear diameter gets smaller and smaller. So manufacturers are forced to either need to make the ring gears thicker and thicker to compensate (which gets expensive due to additional material), or change the carrier to bring the ring gear closer to the pinion gear for those ratios that require it.

The nice thing is that many aftermarket ring and pinion gear manufacturers offer "thick" gear sets. They make the ring gear thicker to allow you to use, for example, a 4.88 gear ratio on a carrier that's made for 3.73 and numerically smaller ratios.

The Dana 44 is a popular differential, you probably don't need search around for a new carrier, a thick gear set is likely available, and probably only about $40 more than a standard thickness gear set.

10-09-2012, 08:42 PM	#1
D.PASSMORE One of the First Join Date: Jan 2000 Location: St. Augustine,FL. Posts: 4,055	D44 carrier Question: Is a D44 carrier the same for different gear sets? I'm changing from a 3.08 to a 4.09. I know a chevy 12 bolts have different size carriers - splits at 3.73 up for trucks. Thanks __________________ DAVID PASSMORE ST AUGUSTINE ,FL ZIP 32084 '71 SWB K/10 CUSTOM DELUXE (Chili) '72 BLAZER K/5 Muscle Truck (Mule) '72 LWB K/20 CHEYENNE (Blackie)

10-09-2012, 09:29 PM	#2
Redcap Registered User Join Date: May 2010 Location: Lewis County, WA Posts: 1,523	Re: D44 carrier http://www.differentials.com/technic...carrier-breaks

10-09-2012, 09:48 PM	#3
D.PASSMORE One of the First Join Date: Jan 2000 Location: St. Augustine,FL. Posts: 4,055	Re: D44 carrier Thanks, I felt it did, just didn't know where. Now to find one...

10-10-2012, 06:54 PM	#5
wilkin250r Registered User Join Date: Sep 2010 Location: Lake Tahoe, Nevada Posts: 755	Re: D44 carrier Interesting. For some reason, I had thought the carrier break on a D44 was at 4.10, but I am probably just confusing that with my rear axle. The reason for the carrier break is that as you gear lower and lower (higher numbers, 4.10, 4.56, 4.88) the pinion gear diameter gets smaller and smaller. So manufacturers are forced to either need to make the ring gears thicker and thicker to compensate (which gets expensive due to additional material), or change the carrier to bring the ring gear closer to the pinion gear for those ratios that require it. The nice thing is that many aftermarket ring and pinion gear manufacturers offer "thick" gear sets. They make the ring gear thicker to allow you to use, for example, a 4.88 gear ratio on a carrier that's made for 3.73 and numerically smaller ratios. The Dana 44 is a popular differential, you probably don't need search around for a new carrier, a thick gear set is likely available, and probably only about $40 more than a standard thickness gear set. __________________ I know a little about cars, but if you have a question about electricity or sport quads, I'm your man!!!



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