Help wanted,front diff failure?

[spn]

Originally Posted by FAT4S

thanks simon

i am going to attempt pulling it apart this weekend as a guy who used to have an evo6 rally car seems to think its loose bolts and yeah he said its a tight plated diff wich explains the shudder feeling when im going slow but if i excelerate when turning and then back off quickly it clunks wich he said is because the bolts are loose.

so with luck ill fix it or totally stuff it

cheers
john

No problem John

It could be loose bolts but assuming it is a plated diff could be worse unfortunately http://www.lancerregister.com/showthread.php?t=339240.

The bolts on the helical diff come loose because there's only 4 of them and they're not really up to the job. Plated LSDs tend to have a lot more bolts so it's often something else that fails.

Hopefully it'll be an easy fix for you.

Cheers,

Simon

[FAT4S]

holly crap
after looking at that thread i hope mine doesnt look that bad.
on another note i asume its the same removal process and if its stuffed is there a place that sells and exports them ?

Thanks again
John

[Aznmobstar786]

Hi there guys reading your posts mine has developed the same problem, i will take mine apart also and have one my mechanic buddys to have a look, just wanted to ask 2 things, if somebody could kindly help:

1) which bolts will i need for the replacement ones, as reading the post it seems like i need some strengthened ones?? where can i get these?

2) And mine also has a little whine, what can this be and whats the best way to get rid of it??

Thanks

[ugeneius]

Hi guys thanks so much for the informative post. I just imported an evo 4 from japan and unfortunately had a bunch of inexperienced guys touch the car. I am experiencin a similar problem with my car.i wanted to ask is it possible to have the same problem on an evo 4? And any ideas on what would cause oil to leak from my rear diff? I've searched the forums and haven't found any description with my same problem. It seemsto be leaking oil from the join. No visible damage.like crack etc. Appreciate any help .

[jade468]

Hi all the 4 bolts you are on about hold the cap on to the front diff which is located in the transfer box. The upgrade is to replece with 12.9 bolts which you can get from any good nut and bolt stockist. The shuddering and clunking feeling is the diff coming apart when accelerating this will happen to all RS diffs plate or gear type when the bolts break.
Please contact me if you need more info

[clivew]

Originally Posted by jade468

Hi all the 4 bolts you are on about hold the cap on to the front diff which is located in the transfer box. The upgrade is to replece with 12.9 bolts which you can get from any good nut and bolt stockist. The shuddering and clunking feeling is the diff coming apart when accelerating this will happen to all RS diffs plate or gear type when the bolts break.
Please contact me if you need more info

There are no plated type front diffs fitted as standard.

Fitting 12.9 bolts will not solve the problem, only lengthen the time to failure.

[jade468]

This has worked for all the diffs that i have done for motorsport use. the plate diff is a ralliart upgrade for Group N competition from the gear type as it was not legal to run in Group N. But i thought this thread is to help not to confuse people

[clivew]

Originally Posted by jade468

This has worked for all the diffs that i have done for motorsport use. the plate diff is a ralliart upgrade for Group N competition from the gear type as it was not legal to run in Group N. But i thought this thread is to help not to confuse people

This thread is about the standard fit Helical LSD, the Ralliart diff is neither standard fit, nor suffers from broken bolts, so why mention it and confuse people?

I know of many privateers that break 'uprated' 12.9 loctited-in bolts every 90 stage miles, and have worked with one resolving the issue with a different design.

The ones that haven't broken with motorsport use can't be being used very hard as this is a design fault, regardless of which grade bolt is used. If the diff is analysed it's quite easy to see why and how they come loose and break.

[jade468]

well i have seen them broken as i have worked at ralliart and thats the rally team not the shop as all the recce cars ran on them

[Nad]

If you get fed up with them braking just weld the thing together......

[james evo]

Subscribed!

[kikiturbo]

do only the older cars have front diff problems?

Newer cars seem to have different type of bolts IIRC...
I loctited mine in just in case... on my 9


quite a simple job really...

[adrianojp]

Originally Posted by kikiturbo

do only the older cars have front diff problems?

Newer cars seem to have different type of bolts IIRC...
I loctited mine in just in case... on my 9


quite a simple job really...

Anyone on this? I have an 8 GSR (AYC) and am experiencing the clunking too!

[kikiturbo]

well, take the transfer box off and open it... it is quite a simple job really (if you have access to a two post lift).. much easier than doing the clutch..

[adrianojp]

Yes, my mechanics are working on it, just wanted to know if this is a known issue also on 8GSR's?

Originally Posted by kikiturbo

well, take the transfer box off and open it... it is quite a simple job really (if you have access to a two post lift).. much easier than doing the clutch..