Buf-Phoon loitering with intent Lifetime Members 13,318 Member For: 21y 8m 15d Gender: Male Location: Zombie Birdhouse Posted 29/04/10 08:30 AM Share Posted 29/04/10 08:30 AM On 28/04/2010 at 11:41 PM, F6_Tornado said: The box is simply slipping with all that torque and as such will need some new clutch's and preferably upgraded to handle the 350kw you are shoving down its throat.Once upgraded it will handle that 350 easily. as long as the tuner also knows how to set the trans setting in his tune. listen to this bloke Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1004087 Share on other sites More sharing options...
shananp Member 248 Member For: 15y 8m 24d Gender: Male Location: Werribee Posted 29/04/10 08:34 AM Share Posted 29/04/10 08:34 AM On 29/04/2010 at 8:30 AM, Buf-Phoon said: listen to this blokeI agree... Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1004089 Share on other sites More sharing options...
jescam Member 55 Member For: 20y 9m 16d Location: NSW Sth Coast Posted 29/04/10 11:06 AM Share Posted 29/04/10 11:06 AM On 28/04/2010 at 11:22 PM, Benji_vs said: Would that put it into limp mode?Didn't with mine, it just wouldn't shift out of 4th gear up to 5th under hard acceleration. On 28/04/2010 at 11:41 PM, F6_Tornado said: The box is simply slipping ..........Same as I said. Just get it rebuilt stronger, and you will be fine. Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1004121 Share on other sites More sharing options...
antonioxr Member 29 Member For: 15y 11m 28d Posted 03/05/10 03:25 AM Author Share Posted 03/05/10 03:25 AM hey sorry 4 late reply been away from the comp rang my tuner the next day and he said it would just be in the tune and having the slicks on might be throwing it off a bit cause was originally tuned on street tyres. and I def am reving out 4th gear 3/4 track and need 5th for the rest of the track I was passing the line at 122 mile the previous week at the end of 4th but on wed night was a lot cooler and had 2 back off cause was hitting rev limmiter in 4th 3/4 track and couldnt change gear. I just had the box serviced on fri from sure shift at geebung very happy with there work and it goes back in rdp on wed to get retuned will let u's know on how it goes Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1004818 Share on other sites More sharing options...
Benji_vs Donating Members 403 Member For: 16y 11m 27d Gender: Male Location: East Suburbs Melbourne Posted 03/05/10 03:51 AM Share Posted 03/05/10 03:51 AM What would the tires have to do with it? Let us know what happens. Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1004820 Share on other sites More sharing options...
jimmy1234 Donating Members 364 Member For: 17y 2m 26d Gender: Male Posted 03/05/10 04:14 AM Share Posted 03/05/10 04:14 AM On 03/05/2010 at 3:25 AM, antonioxr said: hey sorry 4 late reply been away from the comp rang my tuner the next day and he said it would just be in the tune and having the slicks on might be throwing it off a bit cause was originally tuned on street tyres. and I def am reving out 4th gear 3/4 track and need 5th for the rest of the track I was passing the line at 122 mile the previous week at the end of 4th but on wed night was a lot cooler and had 2 back off cause was hitting rev limmiter in 4th 3/4 track and couldnt change gear. I just had the box serviced on fri from sure shift at geebung very happy with there work and it goes back in rdp on wed to get retuned will let u's know on how it goesI don't get why you need 5th... I cross the line at 126mph and still in 4th... Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1004826 Share on other sites More sharing options...
antonioxr Member 29 Member For: 15y 11m 28d Posted 03/05/10 04:55 AM Author Share Posted 03/05/10 04:55 AM are your diff gears stamdard?? mines all stock and def need 5th Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1004832 Share on other sites More sharing options...
Guest Slash Guests Posted 03/05/10 05:32 AM Share Posted 03/05/10 05:32 AM On 28/04/2010 at 9:32 PM, BensXR6T said: Maybe on a stocker ... but with 350 at the wheel he's gonna need 5th ...I'm with paulie, let it cool down and see if it behaves itselfand get the bloody thing serviced!!Sorry mate, but your statement is incorrect.I was running more power than 350rwkw & never even came close to changing into 5th gear at the drags. Managed a 10sec pass & numerous 130mph+ runs & crossed the line around 5500rpm after changing at ~5200rpm through the first 3 gears.4th gear is < 1:1 & combined with the 2.73 diff ratio, there is potential for big mph without the need to change to 5th gear.When are you shifting for 1-2, 2-3 & 3-4 changes mate? Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1004836 Share on other sites More sharing options...
Guest Slash Guests Posted 03/05/10 05:35 AM Share Posted 03/05/10 05:35 AM Also, what size tyres were you running, what's your rev limit set to & what was your half track mph? Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1004838 Share on other sites More sharing options...
antonioxr Member 29 Member For: 15y 11m 28d Posted 06/05/10 10:11 AM Author Share Posted 06/05/10 10:11 AM its got 16" mt street slicks and shifting gear at about 5500 each gear shift and if I leave it in 4th ill be hitting rev limitter for 1/4 of the track not sure half way speed dont have the slips on me Link to comment https://www.fordxr6turbo.com/forum/topic/67818-zf-gearbox-not-changing-under-heavy-load/page/2/#findComment-1005493 Share on other sites More sharing options...
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