davens

Again...the tranny thing. I understand from the FAQ and what you're saying here, that the 95 G tranny is the ideal but you just said his 95 DX F tranny can be made to work?
Is there a difference in a 95 DX F tranny and a 98 DX F tranny?
And really, how much weaker is the F tranny than the G tranny. I get the impression 96-98 BP owners aren't necessarily plagued with problems...perhaps the tranny is wholly adequate if you're just going to be using a lightly massaged BP motor and you're on a budget?


Earlier in this other thread I asked:
And TheMans response was:
So the FAQ says:
Owners with Z5-DE engines will have a very interesting task on their hands when performing the swap-- transmissions. Contrary to popular belief, the 1995 model was the only year that the 2nd generations receive the G25M-R transmission. This transmission is more favored due to its tollerances to higher engine power. All 1996-1998models received only the F25M-R transmission which is generally regarded as weaker.
First, you will have to find out what year and car # your car is (super easy). Then you will have to decide which transmission you want to use. Regardless of which year your car is, using the G25M-R transmission will mean more parts required to install the engine and transmission versus the F25M-R. It is strongly recommended that you use the G25M-R.When doing the swap, you will need a new transmission anyway, so there's not really a point in using another F25M-R.
If you insist on using the F25M-R (which is fine if you are just swapping to the BP-DE): You must get a F25M-R from a 1996-1998 BP engined Protegé

Help me out here...the information is getting a little conflicted.

TheMAN

there are many descrepancies I found in the 2nd gen swap info since the time I wrote it. The parts list I provided is still mostly correct (what part is needed is correct, but quantities are not)... the Z5 and the BP have the same bell housing bolting patern, therefore a tranny originally from a 1.5l 2nd gen will fit into the BP fine. The only problem is the "economy" gear ratios. Using the F tranny that came from a late 2nd gen 1.8l car will have a more performance oriented gear ratios, but the tranny is still weak. So yeah.. the tranny tidbit there is kind of screwed up... what I also didn't know at the time I wrote that was the fact that the B6 used in the 323 has the same bell housing bolting patern as the B8 Protege. As we all know, the B8 uses the same block as the BP. those things I've mentioned have been fixed already... it's just sitting on my hard drive... it'll be up along with the next big update....

so to CORRECT myself and retract my previous statement in the other thread... I will say now all 4 variations of the SAME tranny will fit the BP... oh and the F5M-R will fit too.... but why use it?

davens

cool...thanks for the update.

Pigeon

well
this is something that im sure a lot of people are now considering.....
so my 1998 1.5L F25MR tranny WILL work on a BP engine, despite i will have the current gear ratios instead of the more "performance oriented" 1.8 F25MR ratios

this doesent bother me at all, because i just want to get the swap done without having to buy too many things, and not having to buy another tranny is going to save me time and money

Now, i could attest that the F25MR tranny is weak, cause when i first got my car, my differential gave up
mazda fixed it under warranty, but i was surpised how crappy it was
and that was when i first got the car, i never really did much racing or agressive driving

now i have been doing lots, and the tranny is holdin up just fine
so if i decied to go through this swap, im going to keep my weak F25MR with economy gear ratios, with my main reasoning being that... i already have it, i already have the mounts, and it will fit just fine

and from the information i could gather from the FAQ
the only different gear ratio is the 4th gear one.... which is totally fine by me

so that is a concern that i will not bother myself with anymore

my next one is wiring.....
obviously i have to get an ecu
thats understandable

but im just waiting for bruce to get his in and running so i could see exactly what harnesses he had to use

when i get mine, i want it to run reliably and just how it would if i bought the car with the 1.8 (including all the emissions devices)

the thing is that i dont plan to go turbo with it
i dont plan on getting a whole lot of power from it

the extent of my plans would be a performance valvetrain package from a miata BP
and an unorthodox racing flywheel/clutch assembly

that should keep my car nicely in the 15's
and give me enough power to be happy

my other question would be...
about all these emissions solenoids that u just bought
should they have come on the 1.8 motor, or do u HAVE to go get it seperately?

and do we have all the other things in the car thats needed?
would i have to buy any other parts other than an engine, tranny, ecu... possibly a wiring harness, and motor mounts..

is that all that is needed if i keep the current tranny in the car??

cool
thats all my questions
thanks
Chris

TheMAN

not getting another tranny because you can "use the same mounts" is not a valid reason... you STILL need to replace an engine mount and axle support bracket... if you don't ever plan on upgrading the tranny, then whatever... if you do plan on upgrading it one day, then you just wasted money on these parts... money that could have been used on the new parts for the BETTER tranny

Pigeon

yea, i dont plan on ever upgrading the tranny
thats why this is probably the better, cheaper, easier choice

protegeboy78

couldn't you just upgrade after the tranny finnally goes which someday will happen no matter which engine you have in there?

Pigeon

you could do that...

but to keep my tranny would require different mounts than the G25MR
so whatever i choose now i should stay with that design

G25MR is better in everyway, except i have to go find one and sell my old one and buy more parts
its a more sensible approach, but not as simple
that is what the "administrator" wants me to do
which makes sense

im jus trying to keep **** simple
however, i am still considering it

but im not sure about this swap until i hear about the wiring, and i hear that bruce is driving around problem free
then im good to go