Ultra 4 racing has proven to push the limits of the popular 9" ford differential. One of the results has been loosening ring gear bolts which can back out and cause major damage or even end your race as a few KOH racers found out this year.

If you have had this problem and are searching for the fix you can stop looking.

Introducing the "Izzy Bridge Lock" kit from All Tech Motorsports. This kit includes our unique bridge locks specifically designed and tested for the 9" ford differential. New 7/16" Place bolts just like Ford designers intended to be used in this axle, and Loctite 262 which we selected for it's strength and oil tolerance. They fit Spools, detroits and any diff carrier with a flat flange. Will not work with ARBs

In stock and ready to go for $89 shipped anywhere in the USA. One kit does one axle and is cheap insurance if you have ever had bolts come loose and damage other valuable parts of your axle.

Please call to order (951) 970 3399

http://i584.photobucket.com/albums/ss288/llamaman12349/ATM9BLK.jpg

I have never removed this diff and seen tight bolts even with as little as 100 miles but here they are, still good after 300 plus miles of hard running.

http://i584.photobucket.com/albums/ss288/llamaman12349/IMG_0356.jpg

This ARB was damaged by 7 of 10 bolts falling out with only KOH and some easy Moab runs on the front diff. The bridge locks don't work with the ARB but stay tuned we have a fix for the ARB ring gear bolts coming soon.

http://i584.photobucket.com/albums/ss288/llamaman12349/IMG_0353.jpg

Fix your pics!!! I need to see / have these!!!

Fix your pics!!! I need to see / have these!!!

Working on the pics here are a couple so you can see them.

hope this works:D

Right on ordered mine already :) These will be standard in all Diff we build from now on!

This is my ARB. After working with ARB we concluded it was due to ring gear bolts. These are VERY cheap insurance! I know they are not out yet for the ARB but they will be soon I would figure.

http://i143.photobucket.com/albums/r138/jpcrawleram/RD99boke2.jpg

Lovell Racing has been testing these and not a single bolt has come loose. Wayne has put a great deal of effort into finding a solution. This year at KOH we lost all the ring gear bolts in the front dif. I had just rebuilt it and everything was clean and assembled correctly. Once the ring gear bolts backed we lost everything, including 3rd member and pinion support. The only piece that was still usable was the yoke.. In previous years we have been able to catch the bolts when they are loose..

This is CHEAP insurance and it works, not to mention the peace of mind it affords. The cost to repair the damage can be calculated. A day lost on the trail or a DNF in race is another story.

Big thank you to Wayne for solving the problem!

I need to add the disclaimer I guess.

We know these bridge locks work very well but they are not a license to forget about all the steps of proper ring gear installation and or normal race prep and maintenance.

Clean the mating surfaces, bolts and bolt holes well, file or hone the carrier and the back of the gear to be sure they are flat and burr free. Make sure there is a slight interference fit between the ring gear and the carrier it should be about .001, check for run out of the carrier and check back lash in at least 3 spots on the gear. Last and most importantly Clean Clean Clean!!

There is some debate on the proper torque of the 7/16" ring gear bolts. The spec is 70 ft-lbs, however there is some statistical evidence of just running them down with an impact working better then a proper torque with a torque wrench. I can't advise you to do that but the theory we have developed is that the heat from tightening the bolt in an anaerobic condition make the locktite start set up while torquing. I came to this when I was testing clamping force and by chance found an oiled bolt gave more clamping force then one torqued with red locktite. So I tried a dry bolt and hole and found it too had more clamping force then the red loctite bolt. Knowing my impact and how fast it gets to 70 ft-lbs I ran a bolt in with red loctite and came up with similar clamping force as the oiled bolt. My conclusion was that the impact got the bolt tight fast enough that the loctite did not have time to set even with the extra heat and the same anaerobic condition.

My testing is crude so I am not ready to proclaim this as fact but it is enough for me to feel ok mentioning the different techniques and letting you do the one you are comfortable with.

As far as overtorquing I tested many bolts and found they can be tightened to about 90 ft-lb max, any more and they start to stretch and take a permanent set. So you can increase the torque a few lbs if you want but don’t think more is better and keep cranking.

Good luck see you at the finish line

Wayne

My ring gear bolts were loose and about to cause major damage after koh. I now have 400+ race miles with the izzy locks and they are still tight. One of the nice things about them is if the tabs are still against the bolt head you know they are tight with just a visual inspection.

Thanks for the fix Wayne!

Those are sweet Wayne!!!

Are you going to make them for the 14 bolt or Dana 60???

DJ

Look forward to seeing the ARB ones

Those are sweet Wayne!!!

Are you going to make them for the 14 bolt or Dana 60???

DJ

It would not be hard to do but I was not planning on it unless there is a demand, I don't think there is the rash of loose bolts in those axles unless you know something I don't.

wayne

several of cars ran these in the RCQ and the MORE 500 this weekend and no failures. They work!

Just did a diff for a 7200 truck with these he is hoping to fix a recurring problem. It will!

call email or pm to order

if you are building a 9" you need these

2 more sets installed this week why take a chance on that new gear set?

ttt

What would b the difference if I ran down to the auto parts store and spent 10$ on a bottle of red locktite

What would b the difference if I ran down to the auto parts store and spent 10$ on a bottle of red locktite

That wont teach you how to fucking read...

What would b the difference if I ran down to the auto parts store and spent 10$ on a bottle of red locktite

That wont teach you how to fucking read...

Lol what's bending 2 tiny pieces if metal going to do to hold bolts n? Have you wasted your money on this yet?

Lol what's bending 2 tiny pieces if metal going to do to hold bolts n? Have you wasted your money on this yet?

Why don't you read the thread he made while developing these...
http://www.pirate4x4.com/forum/showthread.php?t=964503

What would b the difference if I ran down to the auto parts store and spent 10$ on a bottle of red locktite

Lol what's bending 2 tiny pieces if metal going to do to hold bolts n? Have you wasted your money on this yet?

you are a fucking idiot. go away.:shaking:

What would b the difference if I ran down to the auto parts store and spent 10$ on a bottle of red locktite

The difference is that in race conditions loctite has been proven to fail by some of the best in the buisness, not just me. If you don't approve then don't buy it is that easy. You go use red locktite and I wish you well with it. Let me know if there is anything I can do for you.

wayne