so right now i'm talking to a transmission shop about getting some mods done to the C150 tranny for the xA and xB. so i'm asking you all what you would like to see out of the gears. i was thinking, keeping 1st about the same, maybe slightly longer, extending each gear out and making highway travel *60-70mph* to rev at around 1,700-2,000rpm and make the new top end at 150-160 or so for enough top end for some serious speed, but not enough to really cause problems with the rather flat face of the xB. i was going to sugjest to them a 6th gear but i'm assuming they wont be able to add a 6th gear.

so what i've sugjested was this... a nice stronge trany capable of handeling upto 500-600hp so it's nice and durable and longer gear ratios.

so for instance the increase could be as follows:
1st - 5% longer then the current 3.54 ratio
2nd - 7.5% longer then the current 1.90 ratio
3rd - 10% longer then the current 1.31 ratio
4th - 12.5% longer then the current 0.96 ratio
5th - 15% longer then the current 0.81
Final Drive - 2-5% lower then the current 4.15 ratio

hows that sound to everyone? would that be about right? makes 1st and 2nd a little longer whilest still keeping quick acceleration. i'm going to go and have a chat with my dealer and thier repair shop and find out the cost of an OEM trany so i can have it ready to send to the shop. still talkin to the guys so knowing what would be best from everyone could come to great use that way if anyone needs, you can just get a second tranny *so you can keep driving* and just send it in with the perfect new ratios all preped and ready.

ideas :D

 

I assume you've looked into the Echo final drive?

 

i have, but what i'm looking into is a full rebuild or a full tranny upgrade. sure the echo's final drive helps out the short gears and whatnot, but whats to say that it can handel the high amounts of power from the more hardcore tuners here and elsewhere. from what i see, seems after all those internal upgrades, new drive and more boost and whatnot, theres still a worry about the tranny because there isn't any newer stronger trannys out for both xA and xB. so thats why i made this post, get the perfect ratios, keep the acceleration, extend top and, lower highway speed rmps and be durable enough to handel high amount of modified power upto around 500hp. once it's all just right and tested which i will be more then happy to test it on a secondery tranny so if something goes wrong i still have my stock. once tested, we can send off the ratios and size specs to a few companies for future availability, companies like SPEC and Exedy or whoever makes replacement upgrade trannys and tranny kits.

 

i do not know much about this type of thing, but the idea sounds reaaly good.

 

that sounds good! i was thinking of doing the echo swap for some time now!

 

im in... majority of my driving is highway, this is awesome

 

from my experience... this sounds like it would be in the multiple thousands of dollars....

just so that you aren't getting false interest...

Do you have an approx price for this work yet?

 

First should be 3.23 and the car really needs a sixth gear of about .68 to make it really performe. I personally think its not worth the hassel unless ur planning on mass producing these gears. It would be much better to invest in a 6speed swap than creating new gears from scratch.

 

"Do you have an approx price for this work yet?"

not yet, starting on that today with how much the oem tranny is. as for the modifications, still working on that from the shop. i'll let ya know as soon as i know.

"First should be 3.23 and the car really needs a sixth gear of about .68 to make it really performe. I personally think its not worth the hassel unless ur planning on mass producing these gears. It would be much better to invest in a 6speed swap than creating new gears from scratch."

i'm not sure if they will be able to do a 6th gear yet, as of right now it's a total rebuild idea but i'll bring it up to them and see what they say.

 

yeah it's great for mileage improvements or if you are going f/i and have a lot of power. but for anyone who wants to keep up with traffic and actually be decently quick these longer gears suck.

 

and. if you want a 6 speed. just swap in a levin ae111 6 speed trans. it bolts up to our motors.

 

You dont need longer gearing when you're boosting.

On my Civic, I swapped the stock DX tranny (looonng gears) for an EX/Si tranny (much shorter) and it made a HUGE improvement!!

When racing, you usually want acceleration. Unless you're doing some serious highway runs, long gears are not necessary.

 

ahh... not understanding what i'm saying...

those who are getting serious hp in ther xA and xB are now having poblems with thier tranny, having to granny gear all the time and only show it's true nature every once in a while because the tranny isn't stronge enough for the power. well thats what the idea is! get it working stronger and still have the tranny thats meant for the xB. longer gears are just an idea for travel but keeping the other gears near the same *just a tad longer* could help a little, atleast 3rd - 5th being extended. keep the acceleration whilest extending top end, traveling ability and tranny strength.

people want higher top end, thats what i'm doing
peole want longer gears for better highway mpg, thats what i'm doing
people want a stronger tranny to handel the modified power they have, thats what i'm doing.

i don't mind the few thousand it may cost as long as it's just right. so again, i'm just looking for ideas of exntensions, how much extension does everyone want to see and whatnot.

 

hotbox05 - i did see the post on that and does spark my interest, still want to check out the rebuild.

 

$2,125 for the oem transmission, i'm not sure if thats with tax or without. if not then it will be $2,317 for use western washington people... everyone else gets it slightly cheaper. still waiting to hear back from the transmission shop about price and setup. i'll be phoning them this comming monday.

 

also, worldautoparts.com has several new and used transmissions. could very well spend $750 instead for a used one being that it's going through a rebuild. all are in good condition according to what thier page says.

 

Honesty I don't think a top speed of 160 is possible with the current aerodynamic drag. You would have to be making crazy horsepower. Think about it. If it's drag limited at about 110 mph now. How much power would you have to put down to take advantage of the high end of this new tranny? I'd have an engineer calculate that.

 

ok THAT was funny

 

That's were the xa shines. Wedge shaped v. Brick.

 

werd!!!