MT swap, does it really do this?

JLHollowX13 · #1 01-04-2008, 10:05 PM

i was reading somewhere that someone did a swap and said now they feel like the power ratio is more 50/50. is this true? i wanted to do a swap sometime and if this is true id be even more willing to do this swap. also, does it affect anything else such as top speed, etc? if a swap really would make the power distribution more equal then i want to do the swap sooner, a coworker of mine drove her brothers forester to work a few days ago, we park in unplowed snow on a slight hill and when we went to leave she took off no problem watsoever, so i parked in the same spot as her to compare and i didnt get out quite as easily, no problem, but not as easily, and after reading about someone feeling like its more 50/50 i decided to ask, so thanks for any input!

Crazy_pilot · #2 01-04-2008, 10:08 PM

It feels more like 50/50 because it IS 50/50

. The 6MT is 35f/65r.

It's Just Eric · #3 01-04-2008, 10:23 PM

the factory automatic varies in tourque split from *arguably* 90(f) / 10(r) to 50/50. the 5mt is a fixed ratio at 50/50 (Correct me if Im wrong) while the 6mt is at 65(r)/35(f) when it ISNT hooked up to a dccd controller

Torque split aside, the 5mt give you better weight distribution (It's MUCH lighter than the auto) and makes the car they way it SHOULD have been from the factory

odepaj · #4 01-04-2008, 10:41 PM

Quote:

Originally Posted by It's Just Eric

the factory automatic varies in tourque split from *arguably* 90(f) / 10(r) to 50/50. the 5mt is a fixed ratio at 50/50 (Correct me if Im wrong) while the 6mt is at 65(r)/35(f) when it ISNT hooked up to a dccd controller

Torque split aside, the 5mt give you better weight distribution (It's MUCH lighter than the auto) and makes the car they way it SHOULD have been from the factory

Im pretty sure the 5mt is rear-biased aswell. It is possible to lock the 4EAT in 50/50 but its not good because then you get alot of binding while turning, how would the 5mt be any different here if it is also 50/50?

Dustin

NikFu S. · #5 01-04-2008, 11:02 PM

The 4eat binding occurs in the center transfer clutch. The variability of the clutch allows for this problem as an offset for the gains provided by the variability.
The 5mt, with no variability, or the 6mt with manually selected non-variable options, won't bind because it is designed not to, though the 6mt might with the cd locked, hence the option.

I guess this is just a silly way of saying the transmissions are different.

JLHollowX13 · #6 01-05-2008, 12:15 AM

ok, well thanks everyone! so i guess the 5mt is the way to go for the most even distribution? i wouldnt mind a little more kick in the back than in the front and an extra gear, but the 5mt is probably cheaper and less things to worry about? am i correct? i just want the power distribution to be better than what it is, and either the 5mt or 6mt are gonna do the trick, which should i go with though? i want the best performance for the buck. thanks!

Crazy_pilot · #7 01-05-2008, 10:22 AM

5MT = As cheap as you want it to be, really, lightweight, lots of choice. Good choice for daily driver/fun car stuff.

6MT = EXPENSIVE, as near to indestructable as any tranny Subaru's ever made. Good choice for anyone doing major engine mods, craving rear wheel bias, or needing the ego boost of having 6 gears

JLHollowX13 · #8 01-05-2008, 05:35 PM

i was thinking today, and if you take a tranny from another subaru wont the svx just eat it. i mean all other subbys are smaller engines, can those trannys really handle that power? i dont wanna swap trannys just to have it fail on me, my tranny really isnt bad, seems to do just fine, i just want the 50/50 and the control of the rpms, etc. also, someone was talking about having to change the rear diff gears, is this necessary and if so why? and wouldnt it make the back wheels spin faster or slower than the front? just some things i wanna clarify for myself thanks!!

NikFu S. · #9 01-05-2008, 06:47 PM

Any tranny will fail if treated improperly. The only thing worth considering when trans shopping for the SVX is what kind of driving you do. Highway, city, track, or ... ?
Small gears, tall gears, manual or auto? What do you want?

Strength is irrelevant if you drive in a reserved manner and maintain the vehicle.

-
The rear diff will spin only as fast as it can spin. Swapping it out is necessary due to fitment/compatibility issues.

JLHollowX13 · #10 01-05-2008, 07:03 PM

my driving is mostly highway, some city, i wouldnt be doing anything hard, but i would like to keep the top speed where it is if possible, or higher, not that it would ever be going that fast, cough cough haha. just something good all around, probably a 5mt.

also im still not clear on the diff. why would those gears matter? and if you change the rear wont you have to change the front too? the trans gears and the diff gears are seperate, so what needs to be compatible? and how come only the rear needs to be?