So this, if there's enough bottom clearance of course,
Performance Automatic 6R80 2011 12 All Mustang Deep Alum Pan Dipstick PA68402 | eBay

these,
Billet 8AN An 8 ZF6HP26 Transmission Oil Cooler Port Adapter Fittings Pair | eBay

this,
Remote Mount : 15 Row Atomic Cool Plate & Fin Remote Transmission Cooler Kit, -6AN

and these,
http://www.motospecs.com.au/assets/f...ction_Kits.pdf


Bulletproof, time for more power.

Please post pictures of ZF taken apart. It has 5 clutch packs, how many of them are going to be upgraded?

The kit contains replacements for all the clutch packs.

EXEDY Tech - Auto Trans Rebuild Procedures: https://youtu.be/eJUCCVUevMI

Wow, educational...

Fixed the link for you..

Thanks!
The zf-hp and ford licensed 6r80 series of transmissions are super simple internally and identical as service and performance parts are interchangeable. Basically the same trans, just the external case looks slightly different.

Another informative video.

We don't have 600HP so I am not sure that I need to beef up my STR transmission?
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It's in anticipation of more power forthcoming.

Glad to hear it!

Might talk to AVOS? He is already pushing 600HP or so thru the stock ZF. No problems yet.
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AVOS primarily developed for the XKR, which used a VERY robust mercedes 5-speed gearbox...

The twin screw equipped STR/XJR's running ZF 6HP's are few and far between, so its hard to draw any conclusions on how much power the 6HP will hold for us... Luckily very few venture into that territory...

But these builds to the ford 6r80's are very good development news for us! After watching that clip, I'm almost confident to tackle my next ZF overhaul...

The Mercedes 722 is robust but I wouldn't say it's anymore robust than the 6hp. The max torque ratings are similar as far as I know.

Considering they are running 1000 plus horse power through the 6r80 with just upgraded clutch packs, that's a good sign.

Following. Great thread!!

The ZF's are pretty simple internally, shouldn't be too much of a fiasco.

Makes me wonder if I should do some upgrades for the TS, or just let it rock and see how she handles it stock. Hmmm.

gt42r, why do you say "luckily very few venture into that territory."?

I guess we will find out once the kit is released and on a few cars. I'm sold on it, tranny upgrade or not, I neeeeds it.

There are a couple running around now with my kit on a 6hp26 gearbox, remember the 4.2 XKR also uses the 6HP26 gearbox. I wouldn't say the Mercedes box is more robust than the 6hp26, both are pretty strong for street use, and on paper the 6hp26 is even capable to withstand more sustained torque then the Mercedes one.

This is a very small market for these cars. Few will mod them, and fewer still will go as far as doing a TS upgrade... Seeing a TS kit can easily run you $10k+, how many people will go down that path? Which is why I say, luckily for most R owners, we will likely be stuck making stock-like power with bolt-ons, never really pushing or abusing the 6HP26...

Of course it's a very good development that the ford 6R80 is damn near identical, and thanks to being found in Mustangs, it's seeing a great deal of testing and aftermarket development we would have never have seen if it's use was isolated to just Jag use....

I say the MB 5-speed is very robust, because it is. It's used in MANY high hp applications, and many FAST benz's have been built around it... its proven itself... the ZF is clearly getting into that territory now too... I've never suggested the ZF is weak...

Yes the later XK's also used the 6HP26, but how many of those cars have a TS kit running on them? Seems like every AVOS TS kit i've seen on an XK was on the earlier body styles...

Yes, there are a few STR/XJR cars running the AVOS TS kits (2 or 3?), but we are still waiting on dyno numbers and for testing to wrap up... Because of the throttlebody limitations, they won't be able to put out the same max numbers as on the XK applications... Guess we will still have to wait and see on AVOS final numbers...

Then comes the value proposition... I think most owners of these STR/XJR cars, will balk at the price of a TS kit, plus you will likely want to upgrade the diff, maybe build the trans... for me personally, I start to wonder if I'm not better off looking at a 5.0L SC XF-R, XKR, XJR...
Even with a twin-screw 4.2, I don't think you'll outrun a intake/exhaust/pulley/tune 5.0L SC car... Sure, the KB 2.6LHO can support some very serious power, but so far the TS equipped jags are few and far between, and hardly any are making much over 500whp...

All this is why I stated "few will venture into that territory"...