i already have the Richmond gear marking compound on the way, but thanks for the tip i will keep that in mind.. also watched a DIY gear marking on youtube and they mentioned Desitin buttcream for the rear end.. hehe, which seems more expensive than Richmond.


marc

 

ok, i'll be honest here my homebrew tool didnt hold up as i expected, that was a 20$ mistake but well i had to try since i have no welding option.




i had ordered another adjusting tool from eastcoastgearsupply that is welded for only 25$ (i didnt see this before thought only the one from amazon was available for 114$)

http://eastcoastgearsupply.com/i-129...ster-tool.html

i did make a small modification to it by adding a washer hold down with a clamp and a piece of hose to keep the tool from falling into the adjuster.






im still waiting for the gear marking compound to come in by mail.

marc

 

note: ive tried just to verify to keep one adjuster in place for future reference, i couldnt get it done. by taking off the right carrier cap and try to keep the left adjuster in place its the ring gear being hold down by the pinion, the other way around try to keep the right adjuster in place still there is not enough slack to get the carrier out. the right cap has to come lose aswell to get the carrier out either both ways.

i could imagine something like the adjuster tool with the extentions still in place wedged with a slim piece of wood inside the axle tube pushing the tool towards the front of the jeep holding down the adjuster. (i didnt try this tho) or maybe there is another way ??

marc

 

Use lip stick...

 

thats a real turn off lipstick on the teeth

 

ok, gear marking is in and gave it 2 revilations forwards and 2 backwards..

what do you guys think ??

ive set the backlash to 0.010 keeping in mind these are older gears and are worn after 24 years is what im thinking, but since this is first time ive ever done such thing i would like perhaps someone with more experience to comment on these pictures and the result im having here, differential is still open i can still make adjustments.. tomorrow i will put it back together.

marc

 

The drive side pattern is falling a bit low and the coast side is close to the edge. I am no expert on this, but I would try to get the drive side more centered between toe and heel. I guess that would mean the ring has to get a little bit more away from the pinion.

Though the pattern you have now looks close to being acceptable.

 

The cost side is what you go by when setting up used gears and it looks pretty good.

 

Try .008" of backlash and post the pictures.

 

thank you both i surely appreciate the comment..

the preload i have set to 75ft lbs as recommended minimum and with that in mind might give a thicker backlash when a load is put on.. i'll brainstorm on this for a bit and make up my mind.

 

alrighty, been driving the jeep around not a whole lot but about 10 miles.. ive started accelerating slowly on side roads up to 30 mph and it felt alright than took it up on the highway and brought it up to 65 mph..

result: i hear a howl but only on accelerating at any speed when i coast its very nice and quiet, taking turns are quiet as well sounds very good.

reading a bit more on the howl ive read on the net that can be a cause of worn gear set or lack of lubrication, well its filled up with brandnew gear oil 80w90 gl5.. so its not the lack of lub im sure and with all new bearings it has to be worn gear set or/ older used gears.

im keeping my ear on the howl (its not that loud but def a howl) and listen if that gets worse or not. im going to have to drive it around a bit more and get back on this.

marc


http://www.onallcylinders.com/2012/0...veline-noises/
Noise: Howl without whir or rumble while accelerating at any speed (gears previously quiet)
Cause: Worn gear set due to lack of lubrication or overloading

 

I had something similar happen to my 8.25 when I had the rear pinion seal changed a few years ago. I think it is the pinion bearings and not the gears. It annoyed me at first because it used to be so quiet, but then I got used to it. Only way to fix it would be to take it apart and I really don't want to. I would rather pull the whole axle housing and install a junkyard 8.25 - they sell for like $150 around me.

When you go into these old differentials that have thousands of miles and years put together with just the right amount of preload and adjustments, and you change any one of those, you are going to hear it.

In your case, the ring and pinion probably have to get used to the new contact pattern on the drive side. Once they wear down, hopefully they will quiet down some.

 

yeah, hehe i read somewhere when using old gears there is only one solution is to turn the stereo up, unfortunately this jeep doesnt have a stereo. well soon we have a road trip from seattle to san francisco and back that will be a good test.. thats around 1500 miles hopefully that will smoothen it out.

overal it was a challenge doing this project and i learned a lot, specially with the wrong diagnosis thinking it was the wheel bearings and ran into all this. could of have it done a lot quicker.. live and learn i guess

thanks a lot again for all the comments and suggestions very much appreciate it.

marc

 

I did that trip in 2007 with my current XJ. It was a blast with beautiful landscapes. I love the pacific ocean there.

 

it was a very nice scenic trip awesome view and 1800 miles later it seems the howl has smoothen out a bit tho i think i should use thicker gear oil like 75w140 with all that climbing up the hills along the coast. i took several meassurements along the ride and the temperature of the differential never went over 163F. im happy with the results unfortunately our rear passanger side window got busted downtown san francisco and thugs stole most of our stuff so up to the junkyard looking for another window.

marc