Thread: My 6 speed blogger. Swap complete! vids inside

Coheed, I was thinking of upgrading my transmission to the P11 LSD gearbox, would you recommend people just to wait and save up for 6 speed gearbox instead? I know you said you broke a few P11s already.

It all depends on your power levels. The B13/B14/P11 trannies can hold quite a bit of power but if you really enjoy spirited driving on the streets and are not very careful about how you shift and how hard you let the clutch out during those shifts and how many 3rd and 4th gear rolls you do. They can quickly turn into nothing. 450whp and above tends to really shred through gearboxes.

The 6 speed on the other hand should take 450whp like a b13 trans takes a ve motor. That is why im doing the swap and i mean just from an engineering standpoint the 6 speed gearbox was originally designed for a 267hp, 270ft-lb of torque V6 and is still being used in the current 300hp v6's as well because it meets the qualifications as far as strength and reliability go to handle the job.

Our trannies were designed for a 140hp motor. So the fact that they can hold 350-400whp fairly well says a lot. So to say the 6 speed trans will take 600whp easy should be correct. And that looking side by side of a 6 speed stack compared to a b13 stack, the difference is 100X clear that the 6 speed is that much more beefy. So im not worried one bit and can go back to harsher shifts, 3rd and 4th gear rolling burnouts on the street all i want and not have to second thought the trans capability to hold. That and these trannies shift like butter and you have the advantage of a Helical LSD, far superior to the VLSD in our trannies that if your lucky still work properly.

Cant wait for some results Coheed. At this rate you might get done before I do.

The biggest thing about this swap thats been holding people back is the whole big confusion about clutches and flywheels. Andreas has been taking care of the flywheel and clutch part for a single plate disk and for those wanting big power and a clutch that will hold very reliably past 450-800whp the Competition Twin Disk setup will be done in a couple weeks as well. Thats what im using on mine. I loved the twin disk, its easy to drive on the street and it grips like no other. So those will be available in the 1250-1300 dollar range when done. That includes the clutch and flywheel and TOB and in reality isnt much more than a single plate clutch and flywheel setup. So you will now have choices when it comes to the 6 speed swap and hopefully more and more people will jump in on this and make it a regular and kick our weak crappy transmission to the curb.

Coheed, the bellhousing on that side does not stick out any further than your normal P11 bellhousing does. The slave sits more up under the thermostat housing so thats out of the way as well.

The converting to hydraulic is cake, like Keo said use the 95 maxima or just modify the b15 pedal and drill new holes in the firewall and you can make it fit easily. Ive never seen a 95 maxima pedal used so i cant say if its easier but if Keo is right about it bolting right up, then man dont even bother with the B15 one. Thats interesting and id like to see some pics of the fitment of the maxima pedal.

Good luck and definitely take pictures. The more the marrier. I have pics of my swaps progress in the build thread and the stuff i had to do to fit it. But yeah its easy.

Spec V wheels go for 300 a set all day on the B15 forums, 5 and 6 spoke you just gotta keep an eye on it...

thanks for the input ashton, it all makes sense. so are the ratios on the 6 speed good for top end as it is, or is recommended to change the final drive? I'm just asking out of curiosity because the 6 spd swaps I've seen so far have been with NA motors. I just trying to find out where the pros and cons are as compared to spending money on a P11 tranny. My Primera already has a hydraulic tranny but its Non-LSD. I've been told that this should make the swap easier.

Coheed, I wish you good luck with this swap, it should be beast.

the 02 box came with the shortest gears, i believe the same gears in the actual p12 box. The 03 box came with a longer final drive but not as long of a 4th 5th and 6th.

The 04+ box came with the longer final drive and the longest gears. Looking at the chart, I believe with a 24" tire the 04+ box will do an estimated 242mph in 6th gear at 8000 rpms if i remember right.

Im using the 04 box on mine. Gotta have the longest gears for my setup. For all motor the p12 or 02 box will be the one you want.

I've just been sourcing parts for this. I got a fat bonus check and decided after getting some christmas stuff, I will be putting some money down for this 6 speed setup. One thing that I still question is the transmission mounts.

The rear mount bracket that mazworx has is a must. But the driver side mount leaves a little to be desired. The B14 and B15 took different mount setups, but there has to be a better solution for a transmission mount out there besides drilling holes and such. If that is what I have to do, then I'll do it. But I think there should be a factory mount option somewhere out there... or at least I think there would be.

The wrecked spec v here is an 04 model. I can get calipers for the Brembo brakes for pretty cheap also.

I am holding out on the turbo upgrade for now, and going for this 6-speed so i don't have to worry so much about breaking things. Also, my clutch is on its last legs and I need something I am not wasting my money on.

As far as the twin disc ashton, I would go this route but total cost of a single plate is a lot less. Also if anything goes wrong with the single disc I have a lot of options for clutches. The twin is a decent price considering. But new discs for a single plate are only $150. As long as it holds the power without a gorilla leg, i will be very happy.

I would recommend it only if cost isn't an issue. The 6 speed swap all said and done is going to be about $3000 and not alot of people can spend that much for a transmission swap. But the P11 is good, with heavy shockproof it will hold up amazingly well. But They don't like over 400lbft of torque for extended periods of time. Eventually they all fatigue and gears come apart. On a 400whp level, a typical P11 trans should last a couple of years on the street as long as you never wheel hop.

I think one of my p11 transmissions blew up because I was running a really light-weight synchromesh fluid in it. There was nothing to cushion the gears and so it did not last. Also, the engine was pumping out 425lbs of torque on 26psi. That was enough to let it go one day.

Now I see you guys investing the money into this 6 speed swap but, who is to say that this tranny will hold power?

I for one am interested in this install but, the pros need to out weigh the cons by a good amount. Like you said Coheed this isn't a cheap mod/ supposed upgrade.

I am shooting to make a decent amount of power with my car and I have come to accept that I will break gearboxes but, if this is proven to hold power then I would highly consider it.

I would like to see as well because I know plenty of people who have destroyed a spec v gear box. Some of the cars were not even boosted. I also know the RTR spec v car race car had gear box issues. I know that the 04+ models were supposed to be better but I have yet to see one on 400whp car for extended period.

Coheed, you dont have to drill holes in your chassis. The mazworx bracket is solid as hell. Ill take some good detailed pics of it mounted on my chassis. The b14's have the same mount brackets as the b13 so there is no issues with this. Ill get some pics for you Coheed in a little bit.