512tr broken diff !

Does this require a whole engine drop?

 

Jaguar 15, check your PM mailbox.


Ago

 

No it doesn't but its not easy in chassis either, one I sold for a testarossa was done in the car. The rest were yanked to do the swap.

 

Thanks! I'm considering nabbing a 512TR the engine was already out for the service but the diff was never done... and I'm debating my next move.

 

Paul just told me they are not $2000 as I stated earlier. It was my mistake. I told him to put my name on the next run as he is already soldout. Paul and Philwozza are about the same price and cheaper than Modena from what I've read.

 

You can have mine. I only want $3000 for it.

 

Thanks for the info guys. I understand you should definitely change the side cover also which bumps the price higher. Still looking for a broken one you don't want...

Qwasi--I already have an $8,000 piece of art hanging on a wall that I framed in 1988. It is a twisted connecting rod and piston from a Maserati Merak that blew up one day after a moron in Hermosa Beach adjusted the timing chain. He was supposed to be a Lambo/Maser/Ferrari expert. Yeah...right.

 

"Paul and Philwozza are about the same price"

That"s correct but only in Phils version all internals are brand new also ...

 

all internals in the MODENA are also brand new - and all selfmade by them

so nothing against all the other diffs. I´m sure they are also more than fine, but I only have own experiences with the MODENA and I could only say good things of this part

oh. I just see: this is my post no. 1000
so thank you again to the unknown sponsor who gave me a silver membership

 

By "internals" what does that mean exactly.....Direct swithch out?

 

Jaguar 15, the Forza diff carrier is complete including all the internal gears and "silent" clutch plates. The diff is therefore a drop in replacement.

 

Thanks Phil....I'm slow but I'm beginning to get your point. All the "junk" inside is included which is indeed nicer than mixing and matching parts.

 

These are the "internals " I speak of in the oem F diff (pic 1 & 2); have no clue how they are called in English language ... sorry !

Far better than the OEM Ferrari version: the Newman version in pic 3; the Forza version in pic 4, 5 and 6.
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and here the modena diff

does anybody knows perhaps if there would be a torson diff available???
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From the pics above, the failure mode appears to be caused by the weld failure rather than the parent material. In some places, the parent material sheared but more often the weld itself. This is a sign of poor welding parameters, techniques, contamination during welding, inadequate weld cross section at shear line or poor choice of filler material.

Inclusions or solidification cracking is usually the culprit off the bat. Inclusions are usually cause by contamination such as grease during welding and solidification cracking is usually caused by incorrect material selection or excessive gap during weld.

Having said that, has anyone investigated simply re-welding the diff......before failure of course?

 

who would weld a new diff or even a used diff again when it looks fine?
but to try to weld a broken diff would be interesting to see what will happen

 

Don't give crooks clues ... they may even think about it when they have a broken gb ....

But in most cases there will be more damage, f.i. the C & P ...

 

From the pics above, the failure mode appears to be caused by the weld failure rather than the parent material. In some places, the parent material sheared but more often the weld itself. This is a sign of poor welding parameters, techniques, contamination during welding, inadequate weld cross section at shear line or poor choice of filler material.

I agree with Sam on the welding. Not that I would attempt to weld a good diff. But there is a lot of truth in what he is saying.


Ago

 

Maybe we should merge all these diff threads into one, and make it a stickie with a poll.

The thread I started I requested it to be closed..too many going saying the same thing.

 

good idea howie

also I would suggest to have an easier overview that we may have two diff threads:
one for the writing and a second one only ( ONLY ) for pictures to see what happenend to each diff ???

any other idea someone?

 

seems like a great idea

 

Simple. If the chances of a welded diff failing is low, then don't change it, but if the chance was high, then why not reinforce it.

 

Paul;

What is the right way to check?

 

Hey everyone,

How can I go about getting one of these carriers so my 87 TR doesn't become a member of the 'broken differential' club?