has anyone installed a thrust block on a rear 9.5"? (1 Viewer)

[cody c]

Im just in the process of rebuilding my rear third with new ring and pinion. This is the third one its seen in as many years, and Im thinking maybe a thrust block would give it a little more life.

Since I cant reassemble it till I get a replacement bearing (I broke part of the pinion bearing) and I have it apart, has anyone had any luck in doing this modification? Searched but couldnt find.

Thanks.

 

[GLTHFJ60]

Im just in the process of rebuilding my rear third with new ring and pinion. This is the third one its seen in as many years, and Im thinking maybe a thrust block would give it a little more life.

Since I cant reassemble it till I get a replacement bearing (I broke part of the pinion bearing) and I have it apart, has anyone had any luck in doing this modification? Searched but couldnt find.

Thanks.

This thread from a while ago:

https://forum.ih8mud.com/hardcore-corner/436170-cuiser-9-vs-8-high-pinion-strength.html

This thread on pirate makes me think that a thrust block can only be machined into a 100 series 9.5" third member:

http://www.pirate4x4.com/forum/toyota-truck-4runner/888295-ultimate-front-toyota-axle.html

That's all I know!

 

[cody c]

Huh, I guess it hasnt been done on a 9.5"


Yet...

 

[Poser]

There is a reason that Dodge used the Dana 80 behind the 6BT...

 

[GLTHFJ60]

Huh, I guess it hasnt been done on a 9.5"


Yet...

The pirate link was exactly that. The 100 series cruiser came with a 9.5" diff, which apparently had the proper casting to allow the installation of a ring gear thrust block.

Look into that route.

 

[cody c]

There is a reason that Dodge used the Dana 80 behind the 6BT...

Because they kept breaking 80 series axles?

I knew when I bought it with the 6BT that i would eventually be looking at axle upgrades. My better half says now isnt the best time, but since I have the diff out (I have a 60 series 4.1 in there temporarily) Im thinking it may add a bit of strength/longevity to it until I can afford a better solution.

Ultimately Id like to do a tundra 10.5" hybrid 80 axle(s) cause Id like to keep some of it toyota.

 

[Isotel]

im with Poser, Fix the Gear deflection, than you will break pinnions, and then shafts... 3rd time is a charm they say

 

[Zukijames]

there is a guy who races King of the Hammers who is currently having a load bolt set up on his fj80 axle..

http://www.pirate4x4.com/forum/toyo...-compared-8-other-options-4.html#post14800962

 

[mookie]

For about $150 you could have a 14 bolt under there and be done with it

 

[RLMS]

There is a reason that Dodge used the Dana 80 behind the 6BT...

True, I break a dana 70 r&p about every year with my 6bt!!!

so that leads me to the point of the 14 bolt! It will be in next!!


Justin

 

[cody c]

For about $150 you could have a 14 bolt under there and be done with it

Sure, how about I give $200 and you get me a 14 bolt with 4.11's, 6 bolt studs and brakes on it all ready to go. Easy $50 your gonna make here. Just get it to my house or tell me where to pick it up locally all ready to go and I'll PayPal you.


I have the spare diff out and ready to reassemble, I'm waiting on a pinion bearing to arrive, so I have time to mod it if it is doable.

Thanks for the link James! So far you AND GLTHFJ60 are the only ONES who answered my question!

 

[Zukijames]

yeah it gets really old when people feel the need to post on your thread and it has nothing to do with what your talking about/ asking for

ps thanks for not getting a anchor.. i mean 14 bolt

 

[cody c]

yeah it gets really old when people feel the need to post on your thread and it has nothing to do with what your talking about/ asking for

ps thanks for not getting a anchor.. i mean 14 bolt

haha, yeah, if I was looking for a 14 bolt this thread woulda been in the classified section. Not that there's anything with the 14b, I probably shoulda posted a disclaimer on the first post about not wanting info on 14 bolts.


Ill follow the pirate thread and see what comes of it.

 

[mookie]

why is it ok to change your engine out to a cummins but bad to change axles? there's a bunch of us that've been down the same road.....something about your axle is not going to hold up to that much torque and h.p. no matter what you upgrade about it.

 

[cody c]

why is it ok to change your engine out to a cummins but bad to change axles? there's a bunch of us that've been down the same road.....something about your axle is not going to hold up to that much torque and h.p. no matter what you upgrade about it.

Your right. It does make sense.

My question was on how to install a thrust block though, not where to find a 14 bolt.


I dont have time to find and modify another axle to work on my 80 right now. I presently have a 60 series 4.11 in the back and the stub shaft off the 60 series d-shaft so that the pinion and driveshaft flange will match up.

Ever since the swap since the break Im getting more vibes in the rear. I have recieved another R&P to reasseble the 80 diff, and I want to put it back in to get the 60 series parts out and hopefully the bad vibe (thinking out of balance or u-joint on 60 series stub shaft)


I dont have time or money to find a 14 bolt, have it machined for 6 bolt or find new rims, I dont have time or money to find new brakes for it or purchase and repack hubs and bearings, I dont have time or money to get the d-shaft shortened or lengthened and figure out how to match a 14 bolt pinion to an 80 series driveshaft. I dont really have time to fabricate new mounts on a 14 bolt or cut ones off of my 80. The 80 is my daily driver and I have to do a fair bit of single parenting on the weekend while my wife works. If or when I get the hilux together and out of the shop and have some expendable income it would be a great idea to pu tin larger axles.



What I do have is an unassembled third sitting on my counter in the garage waiting for a pinion bearing so I can put it back in the 80. I do have time to drill a hole in the housing and weld in a threaded insert for a thrust block.

You are all right that an axle upgrade is a good idea. I hope you can understand why it is not a good idea for me at the moment.

I dont think this thread is constructive or helpful anymore, mods please feel free to delete it.

 

[mookie]

Sorry man, good luck with it!

 

[bustanutley]

Just for clarification, what are you breaking? I see the last case was a pinion bearing...weird. What about the times before?

 

[cody c]

Just for clarification, what are you breaking? I see the last case was a pinion bearing...weird. What about the times before?

Last break(s), when I opened it up about half the teeth on the pinion and a few on the ring. It happened about three blocks from home so I drove it to the garage.

I could feel it binding and slipping a bit. Later when i pulled the gear sets I found that a pinion bearing was broken too.


The time before that was the pinion teeth and maybe a couple ring teeth.

What came first, the chicken or the egg (or my case the pinion teeth or ring teeth) is hard to tell, but I suspect any deflection isnt helping.

I havent broken any axleshafts yet (though I have broken a birfield about an inch off the splines. The front diff has seemed to hold up fine, but Im part time 4WD.

 

[Mace]

Interesting, I managed to snap both rear SF axle shafts in my 60 (4.88 gears) and it did not touch the ring gear or pinion..

 

[cody c]

Interesting, I managed to snap both rear SF axle shafts in my 60 (4.88 gears) and it did not touch the ring gear or pinion..

Hmmm. You probably set up the 4.88 not long ago, in comparison to a "from the factory" gearset where there is a bit more slop in the bearings, and I suspect the two carrier bearing adjustment hubs were probably tighter on yours.

The second diff was one I grabbed off the mud classifieds, and other than a quick look over I never checked backlash with a dial indicator or preloads.

Im starting to think keeping your carrier bearings at least as tight as spec will help alot.