Gearbox Oddities

[RRPhil]

Yes, your ECX (1058 020 011) model was the last one to use the ‘old’ design for the upper valve body



but you can exchange the shift solenoids between it and your FBG (1058 020 030) model without a problem.





Phil

[ulfilias]

Hi Phil,

Ah....So you can't just swap the FBG (newer and working) with the ECX one (older, solenoid) ???

Would it fit, would it work, would it be an improvement ???

At one point I was contemplating a whole box swap!!!

Lee

[ulfilias]

Just for reference Late model Facelift S8's have extra bars across where there gearbox is, that and those last two obscured bolts are bloody tricky. I now have the gearbox sump loose. Just need to remove those bars with some ground down bolts (thanks speed bumps) and i'll have her open!

Interesting the ATF is a reddy brown. Don't know what the origional fluid is ?

Lee

[RRPhil]

LT71141 starts life with a light brown colour. Let’s hope no one has tried adding Dexron to your transmission........



Phil

[awolfinsheepsclothes]

Glad to see you on here Phil!
Where is the best place to get the correct ATF and what is the part number I tried TPS and the guy was useless and tried to supply me with EP90 gear oil
Cheers Dave

[RRPhil]

I usually get mine from ‘theappledorn’ on eBay. It’s currently priced at £11.49/litre with free postage. The only alternative to Mobil ATF LT71141 is ZF Lifeguard Fluid 5 which is manufactured for ZF by Pentosin in Germany, but it’s hard to get hold of in the UK anyway.



These are the only fluids you should use in your 5HP24A. Never use fluids that claim to be ‘equivalent’ or ‘recommended’ or similar wording. The friction modifier pack used in the fluid has been developed specifically to give the necessary static to dynamic friction characteristics required for the correct operation of the torque converter lock-up clutch when operating in its ‘continuous slip’ mode



The ZF document TE-ML11 provides other car manufacturer part numbers for LT71141/Lifeguard Fluid 5 but I expect that all of these will be more expensive than £11.49/litre





Phil

[Mugzee]

The cheapest place I found Mobil ATF LT71141 was Opie oils. Worked out to about £9/litre when I purchased 12.

[ulfilias]

Hi Phil,

Brown would make sense. It also means that no one has serviced that gearbox in it's lifetime! About 230K on the box!

Any idea on what swapping the bodies would do or if it is possible ?

Lee

[RRPhil]

I don't know of any reason you can't put the newer valve block assembly on the older transmission. The differences between them are internal so the interface should be identical. I guess it's possible that the ECU runs a different calibration, but I doubt it.

Phil

[ulfilias]

Old oil

I swirled it arround the barrel up the sides to give an idea of colour

Sump removed - Oil filter still in place


Valve Body still in place