I currently have a BOYA in my 96 LX, it was replaced at some point by the previous owner, so I don't even know what is supposed to be in there. What's the difference between these trannies?

 

all accord auto trannies from 1990-1997 are interchangeable

 

I appreciate the reply but, there's gotta be something that sets them apart. Is any one of them better than the other? Does one have a different gear ratio? Any site with info on these trannies?

 

ill bump this

 

usually the codes stand for different revisions or years of manufacture.

 

Thank you.

 

Hate to dredge up an old post, but will the wiring match up exactly on all these diff models?

For example, will a 94 accord lx non vtec tranny go directly into a 94 ex tranny that has vtec without wiring problems?

thanks.

 

This thread is worth bringing up again, since the OP's question still hasn't been answered conclusively.

I've got a '96 Accord 4 cyl., trans code AOYA that might be needing a tranny soon. I've found a low-mileage BOYA tranny from a '97 Accord for sale. Will it fit, and what ARE the differences?

I've been Googling this topic and really can't find much info.

 

As stated before, most likely just revisions to improve on the shift quality. The only noted difference I found regarding '94-'97 trans is that the Station Wagons used a 4.285 FD over the Coupe/Sedans 4.133 FD. So if you want a slight advantage in acceleration the Wagon trans would be the way to go. '94-'97 Transmissions are the same(excluding revisions and WagonFD). I avoided 90-93 Transmissions when I had to get a replacement as I felt that the '94-'97 may have had internal revisions to meet the newer body styles needs, load/capacities/engine options.
The car in question is a '95 EX, had a replacement '97LX trans in it, and that was replaced with a Japanese '97IIRC.

There's no real mystery to these transmissions. Among automatics, these are fairly simple, as they do not use a planetary gearset or bands.

 

Thanks for the reply Mike.

I've owned a '96 Accord DX sedan (AOYA) and now a '97 Accord Wagon (BOYA). One difference I've noted is that the Wagon trans requires 3.4 quarts for a fluid change; the '96 DX only took 2.4 quarts. Evidently Honda felt the Wagon trannies would be working a little harder and needed the extra capacity for better cooling. It seems the BOYA trans was used in all Wagons, and the AOYA or MPOA in most if not all other 4 cyl. Accords.

Here's a site that sells rebuilt Honda Trannies, where I got some of this info. (No affiliation.)
http://www.automotix.net/transmissio...inventory.html

If all the '94-'97 4 cyl. trannies are indeed interchangeable, that tells me that, given the extra fluid capacity plus a slightly lower final drive ratio, the BOYA tranny would be the more desirable one to use when doing a swap. The electronics would also have to be compatible; are these truly a "plug and play" situation or are there differences in the computers and/or the way the electrical connections hook up?

 

Depending on where the capacity is added. Probably a slightly larger pan. Without checking parts #s or seeing the two side by side I cannot confirm where the extra capacity came from.
Indeed if the wagon transmission is a 'BOYA'(I am not qualified to say whether or not that tag is associated with wagons), then I would agree that the higher capacity and lower FD would be more desirable for cooling and acceleration.With the exception of rudimentary controls, the AT ECU is the controller. I would guess that a 2dr 2.2EX programing may have slightly higher shift points at WOT than say a 4dr 2.2DX. But that's speculation. Again the only way to confirm would be to cross reference the part numbers and verify with the actual parts.

AFAIK it is plug in play.
I know 90-93 has been mentioned as usable, but those cars have different gear ratios.

http://www.cb7tuner.com/vbb/showpost...90&postcount=2

 

Thanks for all that Mike. I think it's fairly safe to assume there aren't any major differences and that a BOYA tranny will work in my application.

 

So what's a MPOA tranny then ? What vehicle is it from ?

 

I *think* MPOA is from the F22 92-96 Prelude. Rpms will be ~200 higher than stock at cruise.

 

I has personally done this with a 96 non VTEC LX Accord which had a "MPOA" trans and swapped it into my 1992 Honda Accord EX CB7 which used to have the APXA. The only difference I've noticed so far was the size diameter of the torque converter bolt pattern to the flywheels(one measured 10inch exactly center to center and other measured 10-1/4 inch) that being said the 92 Accord has the timing marks on the flywheel whereas the 96 LX does not so I had to compensate that by making my own marks other than that I used the 96 trans computer. Everything bolts same wired same axles fitted, so far runs & drives okay. Seems quicker to revv.