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Yeh I?m running locked TCC from 3rd gear and above, if you are running a road car then you?ll creep up on that 6th limit pretty slow, but running reduction gears your flying through 6th.

The stress increases as the gear ratio becomes higher, engine torque stays the same, but the work load increases.

Speaking to my builder we have an uprated material 456 shaft, but the problem is...

Nice work TreCool, that tally?s with my logs input shaft rpm.

The reason they put this safety factor in is because 6th is such a tall overdrive it puts tremendous stress on the 456 shaft, now if...

Hello, that would be greatly appreciated, same for me on the logs it looks to be 230K, transmission speed not vehicle actual.

To help anyone else out, Zero Gravity said;
It is hard coded to protect one of the hard parts. You are limited to around 4000 rpms in 6th gear

Anyone got a solution?

Thanks, it?s a bummer! Pointless having 6 gears if you can?t use them!

There must be a way around, anyone else?

Hi, actually no, looking at the logs it?s as soon as it hits 230kmh in 6th it drops to 5th regardless, most annoying

Is this something that ?safety shifts? will address?

Hi all!

Hoping someone has some prior experience of this, from my searching it appears the 6L80 is output shaft speed limited or something?

The problem I?m having on my off roader is...