Alterntive Replacement WH/XH Front Diff Bush's
 

I have come across some alternatives to the factory type front diff bush's **)
First type for the top 2 bush's. (are being used by a couple of forum members already)
http://cdn3.volusion.com/fyanx.kxcxt...jpg?1430734355
http://trzmotorsports.com/wp2/?produ...ential-bushing
http://www.highhorseperformance.com/..._p/700-105.htm

Second type
http://static.wixstatic.com/media/46...1.2_75_png_srz
http://www.jeeperf.com/#!product-pag...9-8ff24434adf2
http://www.ebay.com.au/itm/05-10-Jee...AAAOSwDNdVqN0O
http://www.ebay.com.au/itm/05-10-Jee...kAAOSwMmBVnp1A

Any advantages to these over factory bushes? Are they cheaper/better/easier to fit?

Cheers,
HB

Supposed to be better but only real world use can tell you that.
I will fit the silver/black ones to the top of the diff & the orange/red (one with the bar through it) for the front support, waiting till after Xmas when the $$ are back.

They are more expensive then the factory ones, 2 to 3 times more expensive! But if they are as good as they claim & you have changed these before you will happily pay the difference. Prick if a job.

I have been told that it stiffens up the front end improving power transfer (less movement means power is transferred to the wheels more efficiently)

The negative is supposed to be more vibration can be transferred due to the rubber compound not absorbing as much as stock ones. Reports from the American SRT8 forums is no different to slightly more vibration.
http://www.cherokeesrt8.com/forums/a.../t-150402.html

The reason to replace them is not so much the knocking & excessive movement that you get when they fail but the pinion alignment with the front prop shaft, alignment issues are the main reason the boot fails on the CV in the end causing CV failure :evil:

I replaced all the diff bush's with factory ones & the CV, I still had a CV failure 30,000km later.

Good finds thanks Clarky.
My last OEM replacements only lasted ~30kkm, and now well overdue for replacement. Think I might've stressed them when I had the diff hanging a few weeks after installing.
I'll try the red (polyurethane I assume.) upper ones if you're gunna try the silver/black ones.

Looking at the two threaded bushes ,how are they tightened up.? Doesnt seem to be any flats for spanner etc.

The only install pic's I found showed them being tightening up with a pipe wrench.
http://bocafallsweather.com/files/je...ingTighten.jpg

Maybe the http://www.jeeperf.com/ ones are the go? I may reconsider :?

It turns out Jeeperf have 2 grades of bush's "Super Duty" & "Poly"

Like their tie rod ends too.
http://static.wixstatic.com/media/46...0_0.00_jpg_srz

Contacted Jeeperf on installation details & they got back to me within the hour.
Not bad customer service ;)

Looks like the wrench I caught the apprentice using a few times, only the hammers missing !!!

Pete and Scotty are running the HHP rear mount in their WH/XH's. It will be what i replace mine with as well.

In petes he replaced the front shaft with a DC-uni shaft, and by using the HHP bushing stopped a vibration he had under load and takeoff as the front diff couldnt rotate and cause pinion alignment issues.

I destroy factory bushings every second trip thats why im changing to one lol.

Great info as always Clarky!

Maybe you should try the Super Duty ones?
http://www.jeeperf.com/#!product-pag...f-2a85b377b2d4

VP, Pete or Scotty, how firm/tight are the HHP ones in the diff housing?
Do you need to press them in?
Did you only replace the pinion one or both?

After a bit of deliberation I went ahead & purchased the Jeeperf (standard) set (all 3) for $350au.
I was convinced the HHT were the go after I spoke to drj33p but the fact that they are designed for on road use not dirt swayed me to the Jeeperf ones.

Once fitted I will report back.

Good stuff Clarky. Well worth it. I only replaced mine on the top of the diff recently for the second time.

11 days after Jeeperf posted the bush's they arrived. Very solid looking,
http://www.ausjeepoffroad.com/forum/...76e15918f7.jpghttp://www.ausjeepoffroad.com/forum/...76e4e5b74f.jpg
now to find the time to fit:D

Nice.

Are you fitting them yourself or getting it done?

HB

I swapped mine in 1 minute when I dropped the diff. Just used the right socket to punch the old one out and the right socket to punch the new one in. But dropping the diff takes time. Still quicker than when I changed it while on the car the time before that and all the cursing and skin losing [emoji38]

Will be doing it myself.
Last time I dropped the diff at home & cut out the old ones & pressed the new ones in with a "G" clamp & socket.

Might make it easy on myself this time & visit dear old dad, he has a workshop at his house with a lathe, milling machine & a couple of hydraulic/pneumatic presses. **)

Thanks bjm
 

I have found an Australian source for replacement bush's $339.85
http://www.superpro.com.au/find/supe.../cid-999501266
https://www.sparesbox.com.au/media/c...spf4427k-1.jpghttps://www.sparesbox.com.au/media/c...spf4017k-1.jpg
https://www.sparesbox.com.au/bushing...ign=Spares+Box
https://www.sparesbox.com.au/bushing...4017k-superpro

WARNING! Beam Axle SPF4017K may not fit! Recommend that you do your own research on all information posted as I may have been a little inebriated when I posted this :)-(:

Make sure you take a few photos and do a write-up on the process. I'd be interested to see it so I can decide I could do mine or not.

HB

Hey Clarky, I went onto the link you posted, it's sold. Is there any other way to order these? How did you get them for $360 when they're $299 USD?

If there aren't any, are the Aussie one's as good?

I purchased direct from Jeeperf for $249 USD & free postage, they only accept PayPal thou.
Standard set $249usd http://www.jeeperf.com/#!product-pag...9-8ff24434adf2
Heavy Duty $299usd http://www.jeeperf.com/#!product-pag...f-2a85b377b2d4

from PayPal receipt
Item Number JWKFDBFULLSET $249.00 USD
Subtotal $249.00 USD
Total $249.00 USD
Payment $249.00 USD
From amount $351.72 AUD
To amount $249.00 USD
Exchange rate: 1 Australian Dollar = 0.707962 US Dollars

No idea about the Aussie ones, are you going to be our guinea pig :D

Rubber vs Polyurathane mounts.
 

Has the USA ones got case history greater than 100,000klm yet?
Cant help thinking the rubber mounts for the front sway bars out perform the polyurethane bushes.

Just replaced mine with rubber so will look up this thread in another 100,000 if I still have the jeep at 300,000 klm.

HAHA, now you got me thinking [emoji38] Looks like I might try the Aussie ones and see how they go. I won't have enough time to wait for the other ones as I'm pulling the front out for my mate and installing his Superlift. Plus I'm modding mine a bit again, rectifying lift to allow for the added weight of the winch and the winch bar (finally), so might as well pull the diff out as I'm almost there anyway. I only recently replaced the bushes with the OEM rubber ones. Oh well.

BTW, thanks for that detailed info mate ;)

Your absolutely right about the front sway bar bush's, the factory rubber ones are the only way to go, the blue delco ones I tried failed in 3 months.

The factory diff bush's don't last very long in my jeep so I will give these a go with the hope they last.
The orange ones I purchased are made in Egypt so they should be good in the sand **)

Delivery time was only 11 days once payment cleared.

Clarky
The Aus Superpro SPF4427K WH axle bushes obviously don't have to be pressed in as have no metal outside on bush.Should be much easier to fit. The Superpro diff bush you quoted no SPF4017K appears to only fit Mitsubishi Colts according to SP catalogue.Did you ring them to see if it fitted the WH diff ?

Good pickup there :oops: I may have made a blue in my web searching ( I possibly had my beer goggles on while surfing the web):hammer: .
Hopefully I haven't cost anyone some $$.

Would like to see one in the flesh just to compare.

Just sent an email to Superpro asking why they don't list a part no for the diff mount, and do for the diff bushes.I presume the Superpro diff bushes are correct number for the WH XH.!! Dont know if they are open yet,will post info as soon as I get a reply.

I ended getting the SuperPro bushes. Had issues with obtaining the heavy duty ones from Egypt (couldn't be dispatched due to new Aussie govt regulations). So got refunded, called up SuperPro and had a chat with the head guy. Awesome info.

briteway
Did Superpro have the diff mount as well ?If not are they going to make them.Any info we should be aware of with the SP diff bushes.

Sounds promising.
Are they one-piece polyurethane without a metal outer, as-per the photo?
So you'll need to press one of the flanges through the housing?
Or just two pieces that can slide in from either side?

Given how much stress the diff bushes must see (to fail as often as they do.), they'd still wanna be pretty tight without the metal outer to avoid movement inside the housing.

Any update on initial impressions with the bushes (superpro or other)? My originals are on the way out and want to replace them before a lift and bar goes in shortly.

Sent from my D5833 using Aussie Jeep Offroad mobile app

No, because that item mainly gives up due to the one above the diff. But the order you make is for 2 bushings in one packet.

They are a one piece poly bush and fit in pretty tight and snug. If you notice on the photo, they are "hex" shaped and not perfectly round like other bushes. Being poly and tough, this is to make it absorb vibrations.

Only been installed 2 weeks ago and went on a pretty hardcore 4WD trip. So far so good. We replaced the 2 bushes; on top of the diff and the one on the drivers side above the housing, even though the OEM one was still good, we thought to replace it while we had the diff out.

http://www.ausjeepoffroad.com/forum/...1&d=1456173308

http://www.ausjeepoffroad.com/forum/...1&d=1456173308

http://www.ausjeepoffroad.com/forum/...1&d=1456173308

http://www.ausjeepoffroad.com/forum/...1&d=1456173308

http://www.ausjeepoffroad.com/forum/...1&d=1456173308

I have had my Jeeperf ones in for a few weeks & I am happy with them. I fitted them with the install of my new diffs and as I was quite busy at the time (did the install by myself) so there are no photos :(

It turned out I had quite a few issues with the front end.
Left CV
bottom ball joint

So after all that work I still have a vibration at certain speeds so I can't give a 100% review on them but first impressions are good. I suppose its long term review that will tell the truth.

Install was just like the factory ones so no real story there.
Used one of these to press the bushings in & out http://thumbs1.ebaystatic.com/d/l225...2XGxFfgVzw.jpg
http://www.ebay.com.au/itm/Universal...8AAOSwll1WytQZ
I did make up extra sleaves from pipe as some of the sizes in the kit didn't suit what I needed but it did a good job.

Clarky what about your front tail shaft the uni/cv (can't remember what it is) at the transfer end are common to fail, i had a viberation in mine everybody told me bushes so i replaced them, it remained so i checked and/or replaced other possibilities no good, there was a bit of play in the tail shft so i got it reconditioned and it was gone.

The viberation used to come in at 60 but only lightly, 80-100 it was horrible then gone by 110.

I have a custom double cardan front shaft, its either not balanced correctly or the bearing at the transfer case is on its way or the T/C chain is stretched or the G/Box is on its way or etc etc. When I replace everything then I will know :rolleyes:

double carden tailshaft wtf where did you get that and how much did you pay if you dont mind me asking, i couldn't imagine a stretched chain causing a vibrate.

is it speed or load that cause's the viberation???????

I had it made up by http://www.driveline.com.au/ but any good engineering place could make one.
Approx $1300, about $100 more then a new shaft from Jeep au.
http://www.ausjeepoffroad.com/forum/...811cdbfb31.jpg

I think my shudder I am experiencing is caused by the torque converter not locking when it should & shift points out of wack with the new diff ratio especially at low RPM, like a manual when you select a gear to high & try to accelerate. So I will get that sorted first & go from there. I have found another diff place closer to home so I might get these guys to double check the balance of the shaft.

At about 120 I get a harmonic/pulsing vibration as well.

That type of vibration would be associated with the pinion angle. When I see you tomorrow or Sunday, I'll check the angle for ya, but won't solve the problem without adjustable uppers (or lowers).

nice $1300 isn't to bad, i don't think it would be out of balance if it's a pulse, constant harmonic vibration would be balance or a bearing. i would have to agree with briteway.

Damn, I was caught up in the moment and didn't check it for you.

Don't worry about it, we were half way up a mountain.
The track bar is great, let me know what I owe you.