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Old 21-07-2015   #1
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TMC tuning box in Panda TA

Five days from ordering from the UK my TMC box arrived here in Australia.
I plugged it in, took. Five minutes. Good instructions, but same connection points as the MM tuning box. Harness and box look cheaper and box smaller than MM ME111T.

A rather more significant difference is that the TMC box works! First gear now feels really short as you hit redline so quickly. Second gear on some surfaces shows up more torque steer than I've experienced with this car before, and it feels like a slingshot as it charges through 2000-3500rpm.
It's only been a day, so I'll report back later. But I can tell you that after all the stuffing around with the MM tuning box, the TMC box is worth the extra money if you want something that actually does what it says it does.
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Old 23-07-2015   #2
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Re: TMC tuning box in Panda TA

anything further to report!? I'm picking up my twinair on Saturday and i'm already looking at tuning boxes.....
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Old 24-07-2015   #3
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Re: TMC tuning box in Panda TA

Quote Originally Posted by quotethepigeon View Post
anything further to report!? I'm picking up my twinair on Saturday and i'm already looking at tuning boxes.....
The Eco mode has more punch than before; probably slightly less power than the previous 'normal' mode. I found Eco a waste of time before; it made the car feel gutless.

In 'normal' mode with the TMC, I'm still getting used to it. Sometimes it feels like everything happens at once in the mid-range. Total performance - eg full acceleration from a standing start to, say, 80km/h, feels quicker but not a hell of a lot.

It's the in-gear acceleration where this thing really shines. When in a hurry in the city, and either wanting to grab a gap in the traffic or quickly get up to speed, you just point and shoot. It really seems to make a big difference. In fact, where I used to need 3/4 to full throttle, it feels like at certain revs/speed etc I only need to squeeze the throttle to about a 1/3 for the same effect. Floor it and it feels like a rocket.

I think I will use Eco mode most of the time, and turn it off for a bit of fun or when in a hurry. I do worry about the strain on the powertrain over time, and plan to keep the car for a while. Yet for now, it really works and works well.
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Old 24-07-2015   #4
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Re: TMC tuning box in Panda TA

Sounds awesome, but dare I ask what effect it's had on the fuel consumption?
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Last edited by gar074; 24-07-2015 at 10:19.
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Old 24-07-2015   #5
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Re: TMC tuning box in Panda TA

Quote Originally Posted by AusPanda View Post
The Eco mode has more punch than before; probably slightly less power than the previous 'normal' mode. I found Eco a waste of time before; it made the car feel gutless.



In 'normal' mode with the TMC, I'm still getting used to it. Sometimes it feels like everything happens at once in the mid-range. Total performance - eg full acceleration from a standing start to, say, 80km/h, feels quicker but not a hell of a lot.



It's the in-gear acceleration where this thing really shines. When in a hurry in the city, and either wanting to grab a gap in the traffic or quickly get up to speed, you just point and shoot. It really seems to make a big difference. In fact, where I used to need 3/4 to full throttle, it feels like at certain revs/speed etc I only need to squeeze the throttle to about a 1/3 for the same effect. Floor it and it feels like a rocket.



I think I will use Eco mode most of the time, and turn it off for a bit of fun or when in a hurry. I do worry about the strain on the powertrain over time, and plan to keep the car for a while. Yet for now, it really works and works well.

Interesting. My concern is that the 105 TA did not increase torque over the 85 when presumably they easily could have. Does this imply that the factory torque settings are within limits of the drivetrain specs but over that might be pushing it?
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Old 24-07-2015   #6
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Re: TMC tuning box in Panda TA

I believe the TwinAir's have the C 514.5 gearbox, capable of handling up to 300 Nm.
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Old 25-07-2015   #7
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Re: TMC tuning box in Panda TA

I wonder why they dident give the 105 more shove? It's what makes the TA fun after all.
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Old 03-11-2015   #8
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Re: TMC tuning box in Panda TA

Still redlines at 6000 i reckon. ???
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Old 04-11-2015   #9
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Re: TMC tuning box in Panda TA

Quote Originally Posted by The Pretender View Post
Still redlines at 6000 i reckon. ???
Yup
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Old 05-11-2015   #10
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Re: TMC tuning box in Panda TA

Booooo !!
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Old 26-08-2016   #11
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Re: TMC tuning box in Panda TA

Quote Originally Posted by AusPanda View Post
While not strictly on-topic, I think a weaker link might be the clutch or transmission.
I've just had my TA man gearbox repaired under warranty. It had a chipped reverse idler gear and also a damaged mainshaft.

I'm pretty sure in my case it's because I have modified my Panda. At one point I was running 17in wheels, a TMC tuning box and towing a 550kg caravan (not far, maybe 50km).

Yet being reverse that failed, I'm wondering if the TMC box getting on boost earlier (?) and reversing up my step, short driveway (abt 7 metres long) had loaded up reverse more than it could handle.

I've read before about this g/box not being able to handle high torque; that FCA have built a 105hp version but kept torque at 145Nm like the 85hp version. That must be for a reason.

I've sold the 17s, have the std 14in steel rims and will go to 15in wheels at the most. I don't tow anymore, and if I do it's only be short distances with a box trailer <250kg.
As for the tuning box? I loved it at first, but then I noted it added vibration under low rpm high load conditions (inherent in my TA, but amplified with the TMC box) and difficulty in reversing cleanly out of my driveway without getting excessive vibrations.
Will I keep the TMC box? I'm 50/50 on that. Part of me wants to plug it back in and use Eco mode for most of the time (it makes the Panda only slightly less powerful than normal mod w/out the TMC) and switch Eco off when rolling and wanting a boost of power/torque.

Anyway, as I said, a bit off topic and mods, remove if you wish.
Have resurrected this original thread to answer this comment. For what it's worth, I do not believe that the TMC box caused damage to the Reverse gear, as you simply won't get much in the way of increased loads when reversing out of a driveway - unless maybe if that is up a 1-in-2 slope, 4-up at full throttle....

I also tow a trailer and it maybe weighs about 200kg empty and when I park it up I have to reverse it into the drive up a rise from the road, over the cambered pavement and up onto the gravel drive. I too get those vibrations you describe and I think this is down to the fact that reverse gear feels a higher ratio than First and requires higher revs and more clutch-slip to get the job done cleanly. I can see that this manoeuvre might load reverse a lot - and might damage it if the gear is not 100% engaged cleanly - but I would not attribute this to the TMC box in any way.

I have had experience of a TMC box and I can relate to the increased 'TA vibration' when accelerating at low revs/high-load/high-boost and this is undoubtedly down to the effect of that increased, boosted torque curve. A little bit of engineering sympathy at those low revs based on the understanding that that is exactly where the highest load (and conceivably maximum risk) occurs. From general forum feedback (in particular the 500 section) it seems that the TMC product has been well engineered and with good customer comms as well (they were a poster on here for a while).

Having said all that, you've identified the absolute point at which highest, 'increased' load appears on your car - Towing, Bigger Wheels, TMC box, Low Revs, High load, Highest boost - so to remove at least one of those components from the equation (even for a stock engine) and all should be OK.

Sorry to hear about the gearbox, but I don't think the TMC box would make enough of a difference as to kill the thing, all other points accepted as noted!
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Old 31-08-2016   #12
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Re: TMC tuning box in Panda TA

I think of all the times when I've been in a hurry and reversed up the driveway, still slipping the clutch (can't get up enough speed to release the clutch anyway) but the vibrations are pretty bad in that scenario. I don't remember reversing with a camper or caravan up hill. Maybe I did, and that caused it. Don't know.

I think I will put the tuning box back in, but as I said above, use it in Eco mode most of the time, and be a lot more gentle taking off in normal mode.

I'd really like the cut out moved up from 5500rpm to a bit over 6000rpm, that would make such a difference taking off in a hurry. I was going to get TMC to fiddle with my tuning box to get that, but now? Don't think so.

The Panda is just my go-to car when I don't have work cars, and the logical thing to do is to just leave it alone. Because I like to modify cars, I am not the least logical where the Panda is concerned...
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Old 31-08-2016   #13
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Re: TMC tuning box in Panda TA

I think I completely agree, just don't get bogged down with that reversing thing, as I am certain it's an inherent design 'feature' as your experience is exactly the same as mine. ECO with TMC is much like normal without, so keep the TMC box in there and have the ECO-OFF function as your Sport Mode, for when you're in the mood!

I maybe went too far with my mods on the previous Panda (114bhp supercharged 1.2 if you remember), so I won't take the same path again, but a TMC box is hardly what you'd call 'pushing the boundaries' really!
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Old 09-09-2016   #14
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Re: TMC tuning box in Panda TA

I've been thinking about what could've caused the reverse idler gear to chip, and it's just occurred to me how it might've happened.

When I towed the 550kg van, it had override brakes. I had to reverse it a couple times, and each time I forgot to disable the override.

I remember hitting a bump, or a driveway or something, and the brakes activated on the van. This would've caused a fair bit of strain on the g/box I think.
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Old 09-09-2016   #15
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Re: TMC tuning box in Panda TA

Quote Originally Posted by AusPanda View Post
I've been thinking about what could've caused the reverse idler gear to chip, and it's just occurred to me how it might've happened.

When I towed the 550kg van, it had override brakes. I had to reverse it a couple times, and each time I forgot to disable the override.

I remember hitting a bump, or a driveway or something, and the brakes activated on the van. This would've caused a fair bit of strain on the g/box I think.
Far more likely to be the cause!
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