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C30 / S40 & V50 '04-'12 / C70 '06-'13 General Forum for the P1-platform C30 / S40 / V50 / C70 models |
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Are the T5 auto gearboxes unreliable?Views : 1340 Replies : 6Users Viewing This Thread : |
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Jul 7th, 2021, 18:28 | #1 |
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Location: Swindon
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Are the T5 auto gearboxes unreliable?
Hi all, I've had a couple of C30s, and I'm contemplating getting a T5 auto, going to see one tomorrow in fact, but I'm seeing a lot of articles about failing geartronic boxes on c30s s40s and V50s, issues with jerky changes and gearboxes failing at comparatively low mileages.
Are they that bad? Is it just a question of time and they all die, or is it just a well reported minority? Anything to watch out for, any worse years, was it resolved, if so when? Any help / info appreciated. Ta Karl |
Jul 7th, 2021, 18:42 | #2 |
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Which of the two 'boxes, how many miles has it done, and is there evidence of ATF changes?
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Jul 7th, 2021, 18:47 | #3 | |
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Quote:
Reading a downloaded manual I think it'll be an AW55-51 Last edited by KarlC30; Jul 7th, 2021 at 18:55. Reason: Additional info |
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Jul 7th, 2021, 20:08 | #4 |
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Location: Near Bicester, Oxon
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The less well-regarded 'box, but still decent. 56k miles is good news, so:
Check the box by getting it properly hot on a long (20 minutes+) test drive to make sure all is smooth. Banging or flaring of gears isn't good news. Do an atf change (3309 fluid) soon after you buy. There's different schools of thought, but I'd be taking it to a trusted Indy like Horton Cars and getting a complete change for about £300 or so. You're then good for another 50k miles. Useful primer on the box on Horton's website. |
Jul 8th, 2021, 09:26 | #5 |
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My experience is that they are very reliable.
I have a 100K mile '08 T5 polestar C30 and a '11 100K mile T5 polestar C70 both with the 5 speed geartronic and they are going strong and working perfectly (and never had a fluid change). Regards John
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Past : 96 855 T5 CD ruby red, 98 C70GT T5 coupe Saffron, 04 C70GT T5 convertible Navy Present : 95 855 T5R Gul Yellow 08 C30SE Lux T5 Polestar 11 C70 Solstice T5 Polestar 19 XC40 T5 R-Design Polestar |
Jul 8th, 2021, 10:04 | #6 |
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I can remember we had 3 V70 T5 geartronics in Police use and we did not change the gearbox oil and all failed about 70k.
If in doubt change the oil.
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Jul 8th, 2021, 12:50 | #7 |
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v50 T5 6 speed auto here: 151k and the box is sweet as they come. Regularily hooned up and down some alpine passes. It did get better with a fluid change about 10k ago!
Things like shift quality and kickdown got a lot better once I made sure the inlet was airtight and the MAF & throttle body was clean. |
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gearbox, reliability |
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