changing ring and pinion

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Apr 22, 2004 | 08:34 AM

#16

Commo

Senior User

Joined: Jan 2004

Posts: 220

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From: Sierra Vista AZ

Quote:

Originally Posted by tite4x4

Rebuilding the rear 8.8 is relatively easy if you have all the tools and info. I just got done rebuilding mine two weeks ago myself, putting in 4.56 gears and an ARB. Here is some helpfull sites that helped me:
[ The 4.56 gears would be okay for the 35's. If you do go with bigger tires, go with at least 4.88 gears.

Hey Title what did you take out of the 8.8?

I have an 8.8 in the rear with 3.55LS and the Dana 44 in the front.
I am thinking to go to 4.10 or 4.56. The guys ar Randy's told me that I would need new carriers except for the front since I plan on putting in a locker.
I am running 33's but may go to 35's.

Roland

Apr 22, 2004 | 09:42 AM

#17

fishmanndotcom

Lead Driver

Joined: May 2000

Posts: 9,236

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From: Senoia, GA

Quote:

Originally Posted by threefiftyone

The lower the ratio you go, the weaker the gears become.

i've seen 5.13's pushing 44" TSL's with a Detroit locker and 450/500 hp! they seem strong to me!

-jason-

Apr 22, 2004 | 10:15 AM

#18

rlh

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Joined: Sep 2003

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From: Florida Hill Country

Quote:

Originally Posted by fishmanndotcom

i've seen 5.13's pushing 44" TSL's with a Detroit locker and 450/500 hp! they seem strong to me!

-jason-

You have seen this with an 8.8? 37" tires is pushing it with th 8.8 and the D44 with lockers on the 8.8.

The stock axles would also be a big issue.

Apr 22, 2004 | 10:34 AM

#19

fishmanndotcom

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Joined: May 2000

Posts: 9,236

Likes: 12

From: Senoia, GA

ooooooooo no i was talkijng about a sterling 10.25! sorry bout that, lol. when you order gears though if you order thick gears then they are stronger! i dunno if they make them for 8.8 or not though.

-jason-

Apr 22, 2004 | 12:30 PM

#20

threefiftyone

Elder User

Joined: Feb 2004

Posts: 500

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From: Oregon

Well fishman, in theory, the more teeth there are, the weaker the ring gear. They'll hold fine but you should go with a thicker ring gear like you mentioned before me.

Apr 22, 2004 | 05:02 PM

#21

bremen242

Logistics Pro

Joined: Jan 2002

Posts: 3,739

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From: GANS

Actually, I believe the real problem is that the pinion is really small and that is why is it weaker.

Apr 22, 2004 | 06:28 PM

#22

tite4x4

Senior User

Joined: Aug 2000

Posts: 473

Likes: 1

From: Richmond, CA

Quote:

Originally Posted by Commo

My rear was custom built about 4 years ago. Had the flanges that hold the drum brakes cut off. And the 9" flanges welded on. Then I had rotors mounted, 410 gears, and an Eaton limited slip installed. The Eaton basically desenagrated, chiping the pinion gear in the proces. I guese four years of abuse. BTW - the brackets that hold the calipers, Also, hold the axles in place. Thereby elemenating the C-clips inside the carrier.

Since you are planning on putting maybe 35" tires on, I would recomend the 4.56 gears. Also, the guys at Randy's is correct. Idon't remember what the #'s are, but I think it's like 3.73 and below use the same carrier as stock and 3.9 and above use a different carrier. When you go and place your order for parts, just go ahead and order the locker and gears at the same time. The parts person should be able to tell the differrence.

Apr 22, 2004 | 06:49 PM

#23

rlh

Posting Guru

Joined: Sep 2003

Posts: 2,259

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From: Florida Hill Country

There is no carrier break in the 8.8 except for certain locker manufacturers. The D44 break is 3.73 and down or 3.92 and up. For clarification, the stock carrier and Trac Lok for the 8.8 has no breaks.

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Apr 25, 2004 | 09:44 AM

#24

77300i6

Posting Guru

Joined: Apr 2004

Posts: 1,127

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From: Lewistown, PA

Question I have a 77 F-150 4x4x w/ a 300 6. I plan to run 35's on it-will 4.11's be a low enough ratio or would 4.56's be the way to go? It gets a lot of street use. Will I need to change the carrier for the 4.11's? Acually, it'll be 4.11's in the rear w/ 4.10's in the front since I can't seem to find 4.11's for the D44.

Apr 25, 2004 | 09:59 AM

#25

fishmanndotcom

Lead Driver

Joined: May 2000

Posts: 9,236

Likes: 12

From: Senoia, GA

i got a buddy who has an 83 f-150 with a 300 and running 35" BFG's. he has not had any problems running 3.55 gears.

-jason-

Apr 25, 2004 | 10:20 AM

#26

jimdonohue

New User

Joined: Apr 2004

Posts: 6

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Not sure how anyone can say replacing the pinion gear is relatively easy, you gotta have alot of tools, strenth, patience, knowledge, and determination. I darn near killed myself doing this to my 250

Apr 25, 2004 | 10:38 AM

#27

tite4x4

Senior User

Joined: Aug 2000

Posts: 473

Likes: 1

From: Richmond, CA

Well it does help when you have several friends to help with lunch and dinner as cheap labor. But having some good tools is very handy to have. Here are couple that may help out the next time you change gears.

Apr 25, 2004 | 01:11 PM

#28

threefiftyone

Elder User

Joined: Feb 2004

Posts: 500

Likes: 0

From: Oregon

Is a press a must-have item when changing gears?

Apr 25, 2004 | 02:36 PM

#29

monsterbaby

Hotshot

Joined: Dec 2003

Posts: 18,423

Likes: 9

From: iowa

Quote:

Originally Posted by threefiftyone

Is a press a must-have item when changing gears?

yea it is pretty much a reuirement as almost all of the bearings are pressed on in about every rearend, and the more tools you have the easier it is. if you don't have a press or access to one you will probably have to take it to a shop, and payh them to do the pressing, and depending this could end up costing more than haveing someone just set up the rearend for you.

Apr 25, 2004 | 02:55 PM

#30

Muddr Trukkr

Junior User

Joined: Apr 2004

Posts: 59

Likes: 0

im running 5.13's through the 8.8 and d44 ttb to the 35"mud brutes with detroit locker in rear and posi up front, and shes holding up strong, my od gear is a tad weak, buti'll fix that up with some 37's

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