This is a Toyota V6 third. When we put this thing together last year the pattern was spot-on and we were very careful with the back-lash. The pinion nut appears to still be solidly staked and the pinion teeth look fine. If I recall, these are Precision Gear.

http://128.83.80.200/taco/brokediff.jpg
http://128.83.80.200/taco/brokediff1.jpg
http://128.83.80.200/taco/brokediff2.jpg
http://128.83.80.200/taco/brokediff3.jpg

I'm going to rerun the pattern and check the backlash to be sure. Should I smooth the broken tooth before reinstalling?

In the short term, I have a long road trip coming up. Is this POS on it's way to self destructing?

In the long view, WTF? I'm running a fairly beefy V6 with ~217:1 reduction but I'm not throttle happy. I thought Toy rear axles stood up to V8 torque without problems? Did I get a bad set of gears, or is it time for a D60?

Is it on its way to self destructing? Huh? That's a broken ring gear, not exactly normal wear and tear.
From the pics it looks like the wear pattern is WAY off and loading the end of the gear teeth instead of where it should be.
Looks like you've got a re-do in the very near future.

That's not self destruction. If you want self destruction, make up a post and call it "whaddya think of my truck"

Originally posted by MR4WD
That's not self destruction. If you want self destruction, make up a post and call it "whaddya think of my truck"

The sooner you get over it the sooner you'll start enjoying/getting the most from this board. I looked for my first several posts the other day and thank God they expired! I'msure they were the typical whiny, indignant, self-important newbie response to people bagging on my precious and oh-so-special truck.

Like someone said in your thread, if your shit isn't way sick posting on here to get props for it is asking for a world of hurt.

BTW, no way you're getting an RTI of 1k with those meats and those fenders. And your rear blocks suck, newbie! :flipoff2:

no way i would trust this on a road trip, its not going to last long!!! looks like the pattern in way off, the gears arent worn even, maybe carrier bearings are worn???

The pinion is solid with no detectable play, all the bearings were replaced when the gears were installed, I'll double check the pattern with gear marking compound and the back lash with a dial indicator tonight probably... If everything looks good and it turns out I had my head up my ass as far as the initial pattern goes, is there any hope of resetting these gears or should I shit-can them and start with a new set?

BTW, here is the original pattern... Comments?

http://128.83.80.200/taco/r&p19.jpg

Originally posted by skank da sock puppet


http://128.83.80.200/taco/brokediff3.jpg


In the short term, I have a long road trip coming up. Is this POS on it's way to self destructing?

In the long view, WTF? I'm running a fairly beefy V6 with ~217:1 reduction but I'm not throttle happy. I thought Toy rear axles stood up to V8 torque without problems? Did I get a bad set of gears, or is it time for a D60?

long road trip?........ i dunno. it looks like there is pitting on the tooth behind the broken one, and galling on the tooth in front!
probably from broken bits churning around? yikes. i wouldn't trust it personally.:eek:

your original pattern looked spot on to me:confused:
I will be interested to find out if the pattern is the same now or shifted.

ps- what about the preload on the crush sleeve? too much maybe?

Originally posted by MR4WD
That's not self destruction. If you want self destruction, make up a post and call it "whaddya think of my truck"

BWAAAAAHAHAHAHAHAHAHA!!! :laughing:

Originally posted by UZI 9mm
it looks like there is pitting on the tooth behind the broken one, and galling on the tooth in front! probably from broken bits churning around? yikes. i wouldn't trust it personally.:eek:


That "pit" is a piece of cat litter stuck in a film of gear oil. The galling is some other schmutz... I wrestled with that pig late at night by myself and after I got it out of the housing and wrestled it aroung on my garage floor I just flopped it on my bed without cleaning it off. Sorry for the confusing pics.


your original pattern looked spot on to me:confused:
I will be interested to find out if the pattern is the same now or shifted.

ps- what about the preload on the crush sleeve? too much maybe?

On the crush sleeve we used the in/lb torque wrench set it to the suggested value... I'll run the pattern and post pics tonight. I f I was just going to be wheeling locally for the next couple of months I'd just slap it back in and then wheel the wee out of it checking for chunks on occasion... It's the long road/wheeling trip that has me spooked.

Robert, you need to change those gears before making that journey to the 'Con. That's one long drive and much more wear and tear on the rear end than cruising around down at the Slabs.

You could find another Taco 3rd member and carry that as a spare...

BTY, I had a tooth like that on my front 4.88 (Toy 8" 4cylinder) with the ARB. I ground the tooth down and re-checked the pattern. It was good, so I slapped it back in. Of course, we are looking at my trailered rig seeing mostly trail time only compaired to your everything beast with some hard road time ahead.

Originally posted by Lance Morin
Robert, you need to change those gears before making that journey to the 'Con.

Good call! John and I got it wiped off and took a closer look... There is a hairline crack acoss the heel of most of the teeth.

http://128.83.80.200/taco/brokediff4.jpg

The pattern looks like it's moved toward the toe (inside of the gear) and out. The backlash was still in spec. and everything felt tight.
http://128.83.80.200/taco/brokediff5.jpg
http://128.83.80.200/taco/brokediff6.jpg
http://128.83.80.200/taco/brokediff7.jpg

On Randy's R&P site in the tech section (http://www.ring-pinion.com/gear/g0399.shtml) it states:

"I pay very close attention to the bearing hubs on the carrier case. If the old carrier bearing spins on the case, the new bearing will not fit tight and will also spin. Any wear due to a spinning carrier bearing will cause the backlash to open up and the ring & pinion gears will eventually break."

Maybe that's the deal... Fuck it, I think I might start fresh with a spool and use this as a trail spare...

Those need to go. Make your pattern on the new, new gears look like the original gears and you will be good to go.

What worries me is how the pattern got from where it was when we installed the gears to where it is now! When I disassemble it I'll look real close to see if the bearings spun on the carrier...

Originally posted by skank da sock puppet
What worries me is how the pattern got from where it was when we installed the gears to where it is now! When I disassemble it I'll look real close to see if the bearings spun on the carrier...

The bearings should be good on your carrier. The truck is not that old. However, I don't know exactly how many miles you put on it each year.

The spinning bearings usually occur on older carriers because the carrier itself just wears down after time. You can always go to a bearing house and get (or order) a better fitting bearing, but that could be more trouble than it's worth most of the time.

I know when I ran a welded rear end, that I had to sort through several carriers after I busted a rear ring gear. The bearings were spinning on the carrier, but who knows how old that thing was. My 4Runner is an '85, but the carrier could have been from a '79 truck for all I know.

Nice beach marks.

the pics show the pattern recheck on the coast side of the gears???:confused:


the drive side is where the pattern problem is, did you set it up to the coast side?

usually if one side is out a tad set it up so the coast side is out not drive side - d side wears faster so it will break a pattern sooner (must recheck offten if this is the case though)

looks like the pinion bearing is loose worn

Originally posted by Lance Morin


The bearings should be good on your carrier. The truck is not that old. However, I don't know exactly how many miles you put on it each year.

The spinning bearings usually occur on older carriers because the carrier itself just wears down after time. You can always go to a bearing house and get (or order) a better fitting bearing, but that could be more trouble than it's worth most of the time.

I know when I ran a welded rear end, that I had to sort through several carriers after I busted a rear ring gear. The bearings were spinning on the carrier, but who knows how old that thing was. My 4Runner is an '85, but the carrier could have been from a '79 truck for all I know.

hehehe when i worked at a off road shop we would just get a punch and gouge the carier and re press the bearing back on...worked for a while. but i had a 60

chris G.

Originally posted by Lance Morin


The bearings should be good on your carrier. The truck is not that old. However, I don't know exactly how many miles you put on it each year.


Remember he's got an IFS rear under the back...his Taco axle is taking up space in the garage. Probably a late 80's axle, but who knows about the carrier??

hehehe when i worked at a off road shop we would just get a punch and gouge the carier and re press the bearing back on...worked for a while. but i had a 60

:rolleyes:

Doesn't his make you all feel better about setting up your gears at home? You may have to pull it a part a time or two to get it right, but at least you'll KNOW it's right.

Andy

Originally posted by Moab Austin
the pics show the pattern recheck on the coast side of the gears???:confused:
The close-up pics are a little disorienting, but the pattern is on the drive side.


looks like the pinion bearing is loose worn
I can't detect any play in any direction with the third held in a vice and tugging on the drive flange.