Diff Collar

bavfc3364 · **Posted:** Tue Jul 11, 2006 11:09 pm

If any one is interested i have diff collars. These collars have stainles steel bolts and are made to fit without taking to a machine shop to have them fitted. I' am selling for 57.00 plus shipping. Anybody interested let me know.

Neal · **Posted:** Tue Jul 11, 2006 11:13 pm

What about the possible electrolysis issue?

jason thompson · **Posted:** Tue Jul 11, 2006 11:17 pm

just wandering how can you be certain that they will fit with no problem?
could they be over torqued? wouldn't this cause more harm than good?
would it be better to have a GOOD welder weld a few trusses both left to right and fron to rear?
i have seen guys weld on alum. boats here in south LA and not crack or warp them so i would think that welding on this diff should be easy

bavfc3364 · **Posted:** Tue Jul 11, 2006 11:26 pm

The collars are to the od of the diff. Yes you could weld but you run the risk of overheating the seal in the housing. You could probably over tourqe but it only realy needs to be snug with some thread lock to keep from vibrating loose. I will chaeck on tourqe specs if needed.

Jeger · **Posted:** Tue Jul 11, 2006 11:27 pm

Before anyone has their aluminum diff welded be sure to find out exactly what type of aluminum it is made of. Certain types do not weld well while others do. Some may even require heat treatment before and/or after welding to ensure a sound weld.

That being said what are these collars made of? I see stainless bolts but the collar itself? Are they two piece or hinged? Pictures would be nice.

Neal · **Posted:** Tue Jul 11, 2006 11:33 pm

Width/thickness/material?

moose · **Posted:** Wed Jul 12, 2006 5:02 am

Neal wrote:

What about the possible electrolysis issue?

Please enlighten me on this issue. Eddo went with a steel colar, and as I missed the AL order because, I might want one too.

Eddo · **Joined:** Thu Jul 07, 2005 7:01 pm **Posts:** 1214

Dissimilar metal can lead to corrosion problems when placed next to one another. The aluminum is more easily oxidized then the steel. The electrons are transferred from the aluminum to the steel. Essentially the aluminum will corrode and the steel will not. The aluminum ends up acting as a sacrificial anode.

But all you need is some paint on the collar then you will be fine to prevent the steel from corroding and you will be fine.

bavfc3364 · **Posted:** Wed Jul 12, 2006 1:54 pm

Two-Piece Large Bore Clamp-On Collar Steel, 3-1/2" Bore, 4-3/4" Outside Dia, 7/8" Width this is the specs on the front diff collars. I have milled out the centers on the lathe to fit perfectly. As far as the electrolasis problem i'am not sure if there would be any problems.

Neal · **Posted:** Wed Jul 12, 2006 2:59 pm

I don't think any electrolysis is a big deal in our lifetime, there is lots of steel in the bolts and bearings next to the alum housing too.

Se7enLC · **Posted:** Wed Jul 12, 2006 4:16 pm

Jeger wrote:

That being said what are these collars made of? I see stainless bolts but the collar itself? Are they two piece or hinged? Pictures would be nice.

I second that request for photos. Maybe a photo of the collar on the jeep as well as off, so you can see the fit as well as see the inside of the ring.

jason thompson · **Posted:** Wed Jul 12, 2006 10:49 pm

Neal wrote:

I don't think any electrolysis is a big deal in our lifetime, there is lots of steel in the bolts and bearings next to the alum housing too.

i would not be saying that so fast
here in the south espicaly very near the coast i have see a 3"X3" alum. block load cell (weighing system part ,scale) loose nearly a 1/4" of material after only a year the corrision or electrolysis was caused by the SS bolts that were completly encased in the corrision
if you want to prevent that use some nickle based anti seize lubricant between the 2 parts it will keep the 2 metals from tuching and protect them from rust or what ever but they may slip apart
i am not sure but i would think that a good quilty silicone based rtv would work good also

QuestMan · **Posted:** Mon Jul 17, 2006 10:29 am

A: Wouldn't a little never-seize between the aluminum and the collar cure any elctrolysis issues?

B: I'm interested in buying.

Neal · **Posted:** Mon Jul 17, 2006 10:35 am

Thin layer of tape

moose · **Posted:** Mon Jul 17, 2006 10:25 pm

Neal wrote:

Thin layer of tape

Duct Tape!

Neal · **Posted:** Tue Jul 18, 2006 12:21 am

moose
we could go more for mylar or black elect tape
duck tape is more for"stuff"

kjhawaii · **Posted:** Tue Jul 18, 2006 1:05 am

Im interested - I want to beef the diff up before I really put it to the test (we have some trecherous trails here).

A pic shown on your KJ would be great.

And it is SS.

Please email me for payment/info.

KjHawaii

MountainMikes · **Joined:** Sat Jul 09, 2005 3:27 pm **Posts:** 23

I am very interested in this but I was wondering:
Does it really work (REDUCE the risk of breaking the front diff)?
Is there any issue with the different rates of expansion and contraction of the two dissimilar materials? Would it bind when it was hot or be free when it is cold or visea versa? (Real word example: Driving in 100 degree F weather but crossing a cold stream of fresh snow melt.)

Diff Collar

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