I thought that since I'd been running the gearbox tune from DTUK on my S4 for a while now I'd give some feedback so others can decide if it's a good option for them.
Basically it feels like it's tightened up the gear shifts. Downshifts are significantly faster and therefore smoother and I've found that it's much smoother when travelling slowly and in traffic. I've also noticed with the 'butt dyno' that the pull in gear is stronger, potentially being down to the torque limiters being raised slightly to let more of the available power through.
Thankfully, the most annoying aspect of the gearbox has also been addressed by the tune. The initial lag is better, but the transition from braking to accelerating (like when approaching a roundabout or junction) is night and day. My car used to pogo if you tried to get on the power immediately after being on the brakes but this doesn't happen anymore thankfully.
I can't comment on the outright speed of the upshifts being faster as advertised because I've not had the chance to do a full launch control (that's the only time I noticed the shifts felt sluggish), but I'd imagine that much of the smoothing at low speeds is down to the shift speed being increased.
For installation it took all of 6 minutes and that included the 5 minutes for allowing idling of the engine afterwards.
All in, I'd definitely recommend it if you have the spare cash and it can be supplied for most makes of cars rather than just Audi. It also works with S-tronic and has similar positive effect by all accounts!
If you decide to buy, feel free to mention you read this review and it might get you some money off.
If you have any questions about my experience of it, just ask!
https://www.diesel-performance.co.uk/tcu-gearbox-flash-tool/
Basically it feels like it's tightened up the gear shifts. Downshifts are significantly faster and therefore smoother and I've found that it's much smoother when travelling slowly and in traffic. I've also noticed with the 'butt dyno' that the pull in gear is stronger, potentially being down to the torque limiters being raised slightly to let more of the available power through.
Thankfully, the most annoying aspect of the gearbox has also been addressed by the tune. The initial lag is better, but the transition from braking to accelerating (like when approaching a roundabout or junction) is night and day. My car used to pogo if you tried to get on the power immediately after being on the brakes but this doesn't happen anymore thankfully.
I can't comment on the outright speed of the upshifts being faster as advertised because I've not had the chance to do a full launch control (that's the only time I noticed the shifts felt sluggish), but I'd imagine that much of the smoothing at low speeds is down to the shift speed being increased.
For installation it took all of 6 minutes and that included the 5 minutes for allowing idling of the engine afterwards.
All in, I'd definitely recommend it if you have the spare cash and it can be supplied for most makes of cars rather than just Audi. It also works with S-tronic and has similar positive effect by all accounts!
If you decide to buy, feel free to mention you read this review and it might get you some money off.
If you have any questions about my experience of it, just ask!
https://www.diesel-performance.co.uk/tcu-gearbox-flash-tool/