Possible JDM Trans Problem

[schroder]

Well, I purchased a transmission from a Japanese parts importer here in virginia back in february. I have been driving on the trans/transfer case for about 2 months now with absolutely no problems, including a trip from VA to GA, with an "average" speed of around 70 mph. However, when I bought the car, the rear diff made noise, and I recently found out that the noise is called backlash. I also recently ran the serial number on the transmission which read: w5m332wqnk with the letters/numbers uj4896 below it and found that it comes back to a EVO GVR4...and supposedly has a rear diff ratio of 3.909 and is "incompatible" with the USDM rear diffs. My question is this...If the rear diff ratio is wrong, and my center diff. should have already went :: poof ::...why could I make the trip to GA, hitting over 90mph at some times, with minimal vibration...and no problem with the center diff. Could this be caused by excessive play in the rear diff, or simply could the rear diff ratio be the correct one for the 1ga eclipse? As of now it wouldn't be a concern, but I am looking to replace my rear diff in the near future. Thanks for any input!

 

[schroder]

Anyone know if the play would have saved it, or is it possible its actually right? Thanks!

 

[Secksthemex]

I would call a dealer and ask for the specs or get a manual you don't want to dick around with something like this, your lucky your alive

 

[xi Talon ix]

i put a JDM GVR4 tranny in my car along with an ACT 2600. i only have about 100 miles on it but its still doing good with no noise.

 

[schroder]

Secks, I actually have the manual...from haynes...it assisted me in my bottom end build along with many other things. I also fail to see how buying one would keep me alive?

Talon, would you be able to tell me the serial number from your tranny...or use the one I posted and tell me if it matches. Mine actually comes back to a JDM EVO GVR4 tranny...not just the GVR4. Becareful with that trans too, as I hear the GVR4 1st gear is brittle....good luck man, and any extra help would be great!

 

[xi Talon ix]

yea man can check that out for you. the car is at my moms house now so i ###### wont get it until tomorrow but for sure.

 

[schroder]

Thanks man. It just doesn't make sense as I have over 1500 miles on the car with the trans and tcase in it. To me if it was gonna go boom, it would have done it. I dont know tho...I have slack in the rear diff, and that might be saving it?