I have ba 03 xr6t with 68,000 km. my car makes 290rwkw and my tranny just sh*t itself. no 3rd or 4th gear. I even had a tranny cooler on it. oh well. there should be a topic to warn people once you start modifying these cars expecting everything to fail. I have cai,injectors,valve springs, fuel pump and its flash tuned. Since those mods my cat died, so I chaged the whole exhaust, with an extreme force exhaust 2.5 dual. now my tranny has died. I dont have any money to fix it but the people I deal with are fixing it and I can pay them later. I have to say I am little sour on fords at the moment. its the first time I have bought an aussie car. I use to have nissan 200sx and I have to say I only had minor problems with it. but I am not giving up.

search the forums mate, there are heaps of sad stories of 4speed failures, its no surprise with that power that it sh*t itself, rebuild it stronger and be happy!!!

2 in a day.. GREAT SUCCESS!

Yep, pleanty of stories.

Next you will want warnings of CV breakages, Fuel surgin problems, Rod through the block, etc.....the list goes on.

Read a a few more threads and avoid making the same mistakes that many have made before you.

The issue is even worse it seems with the earlier model cars. Im not sure why you are surpirsed it failed. 300rwkw in a car that weighs close to 2 tonnes is going to strain a stock gearbox that is mass produced. Take it from me - Ive had 5 boxes in 2 years. You dont even want to guess how much coin I have thrown at gearboxes in that time

Edited November 7, 200718 yr by IceMyButt

How can you be down on the reliability of a car made to produce 200rwkw's when you've had it turned up to 290rwkw's?

Quoting power outputs does not give enough information.

For example with 290 rwkw you are putting out say 348 fwkw however...

If your peak power is at 3,000 RPM then your peak torque is 1107 Nm

If your peak power is at 5,500RMP then your peak torque is 604 Nm

When the torque exceeds material strength, the material breaks.

1107 Nm is an extreme torque value, for example BMW M5 V10 375 fwkw peak power at 8,000 RPM torque at peak power 448 Nm

Where is your torque peak?

Regards,

aa

well I didnt expect the tranny to last only one week after these mods.

Your c3 clutchs are burnt out. Depending on how many km you cars done pre mod makes a big difference.. Chances are it was already worn 80% and the increase in torque finished it right off

Also sad truth is your gearbox is also in the hands of your tuner... he can make it last years or he can make it last 1 week..

Turn torque reductions during shifting off and not setup ramp rates and ramp presures will see your box have a short life by wearing out the clutches as yours has.