A guy from the junkyard told me if im putting an acura tranny on a honda (EL tranny on honda EX car) that i need to take the gear ratio from my current tranny and put into he acura one. He said it work without doing this but ill get code errors. Is this true? Can anyone confirm? I asked the dealers but they dony know squat, they told me to call a tuning shop.

 

How many threads do you need on this one subject? (Consider this a fair warning that the next time you bring this subject up, it will cause a subsequent immediate thread lock or delete, depending on what you do.)

First of all, if this statement your salvage yard stated were true, you'd be better off buying a transmission from a non-EL. To remove the entire internal setup from an automatic, just to swap it over to something else would be far more expensive then just buying the right thing in the first place.

Secondly, your VSS (vehicle speed sensor) and subsequent Speedometer will still read 100% accurate (unless you altered tire diameter, which is entirely unrelated), no matter which transmission you put in, since it runs off of the ring gear, not the selectable gears.

Finally, the gear ratios for ALL D17 automatic transmissions are as thus:
First 2.722
Second 1.469
Third 0.975
Fourth 0.674
Reverse 1.955
Final Drive Axle Ratio (:1) 4.067

Your salvage yard guy is wrong in this particular case. If it were a manual transmission, the gear ratios are altered between model types... but that STILL wouldn't cause a check engine light.

/discussion

 

I started a new thread because this is a completely different issue.

I double checked my vin with honda and confirmed that my car is indeed an SI not EX. So the straight swap will work and no need to deal with gear ratios. Such a huge relief!

 

Holy ****, I've explained to your 150 times that there is absolutely no difference between the canadian si and american ex transmission. The only difference is the name variance between Canadian and American markets.

 

wow! another thread being created for this old habits die hard

 

hey matt

After the new tranny is put in my 01 civic, do i need to update the PCM software with the Honda Interface Module? It says (’01–03 models only) but not sure if theyre refering to the car year or tranny year. If I need to do this, do i need to go to a dealer?