Transmission code w5m332wqnk

[TSi-Rocket]

Experienced drivetrain issues. Car is an auto with a manual swap and has a gvr4 first gear. The trans is stamped w5m332wqnk which there is little info on. Best I can gather is it is a jdm close ratio trans which will not work with the standard 1g 4bolt rear end. This could be the root of my problem.

 

[19Eclipse90]

Could be. Finally tracked down this transmission in ASA's Japan version. It is listed as one of the transmissions for the Galant VR4 and VR4 RS produced from August 1990 through March 1992. The mating rear end has a 3.909 gear ratio.

 

[TSi-Rocket]

I don't know where I'm going to find a 3.909 rear end gear set for a 1g 4bolt rear end tho. I think I'm going to have to find a different transmission.

 

[19Eclipse90]

Definitely approaching territory I don't feel super comfortable giving advice as far as trying things. So, the part number for the 3.909 gear set is MB860149. While there are people with connections to get imported parts (assuming they do need to be imported), I doubt it would be worth it to you to go through with it if it costs this much, especially when another transmission is easy to find: http://www.discountmitsubishiparts.com/OEMParts/mitsubishi-141/M/MB860149.html

 

[pauleyman]

You dont have to swap rearends. Swap a us spec final drive into the tranny

 

[19Eclipse90]

Thanks for popping in, Paul. That would be the way to go.

Clearly, I'm no transmission guy.

 

[TSi-Rocket]

I have a trans in pieces from when a flywheel/pressure plate let go for parts. My problem is I bought the car and drove it for 6k miles with it the way it sets. The tires locked up on my way to the shootout sunday. Im sure the viscous coupling is shot and with the car on jack stands the front diff is not working as it should.

Paul if the front diff is toasted I'm assuming finding parts for an evo 1 front diff is going to be a real pain. Or can I use the front diff from my 1g awd parts tranny. I'm not really a trans expert either so any help would be appreciated. I will have to pull the trans and check things out, maybe the final drive was changed by previous owner?

 

[pauleyman]

Yes you should be able to use the us spec front diff. Of course all us diffs ar open. You were at least going to use the ring gear and drive anyway. If you had to use the diff instead of the evo diff no problem.

 

[TSi-Rocket]

For those wondering the transmission is an evo 1 close ratio with a 4.26 ratio on the front diff (64tooth ring gear 15tooth pinion shaft). The offset speeds between the front diff and rear caused catastrophic failure of the center diff, viscous coupling, and output shaft.

 

[pauleyman]

How did you not notice it fighting itself on the first drive

 

[TSi-Rocket]

Car has solid mounts, 272 cams.? I didn't notice any problems, its suppose to be my reliable vehicle. I have spent a lot of time making this car nice an reliable. My theory is the vcu will make up differences in wheel speed from the front to the rear and is the reason you get tire slip at slow speed with a welded center. I figure it was making up the difference, when it failed it stressed the center diff, everything got hot and seized the center diff, when it seized the output shaft shattered. I still have no idea how I was able to drive the car to my dads garage.

Either way with 3 awd cars its time to start stocking up on transmissions.[DOUBLEPOST=1409191591][/DOUBLEPOST]I checked my title this trans had 6,000miles on it. The previous owner installed it right before I bought it.

 

[pauleyman]

That is not at all how the viscous works. A welded diff allows no slip. Vcu isnt even required to be installed but sometimes is just to retain the output shalt. With different ratios the center diff....well...differentiates. vcu tries to keep it from doing so. You burned up the vcu in short order. That would stop the fight. From that point on the center diff is trying to differentiate constantly so the spiders are constantly spinning on the cross shaft even when youre going straight and not launching. There is no bearing, just a hardened shaft. And side shims.

 

[TSi-Rocket]

Im not in a position to argue trying to figure it out. The vcu is attached to the center diff and to the output shaft if the vcu doesn't lock the center diff would act as an open diff and you would not get power transfer? I guess on an open diff 1 tire spins if you stop it the other will spin so vcu spins you don't get power transfer? Ive been trying to figure all this out for a week now. thanks for any info pauley.

 

[bastarddsm]

Post some pictures. I'll trade you that gear for the gear you need.

 

[TSi-Rocket]

I have a ring and pinion but its in a good 22 spline trans (which I rather not leave in pieces), I need a good vcu, ring and pinion, and an output shaft with good splines. I made some videos with my gopro to upload to youtube but its my first time using youtube. Plus ive been working 12's to cover the start of my transmission collection.

 

[TSi-Rocket]

So today I drove over the river and thru the woods to this dudes house. He stripped 20+ dsm and had quite a few awd transmissions which was the reason I was there. So he had a trans with a stamp rdot and wanted a fair price for it. I was afraid it was another jdm trans so he took the first cover off. Lone and behold it has steel shift forks. So its early gvr4 or another evo 1 trans woot more parts since the input and gearset are impossible to find. I also picked up an extra vcu and a front output/pinion shaft from a standard dsm for the 3.545 ratio to go with my extra us spec front diff. Trans had the 23 spline output I need although a lil rusty they are in excellent shape. I will tear it down sometime this weekend and find out what the count is on the ring gear. I will get some pics and try to upload them.

 

[TSi-Rocket]

Here's the scoop, evo 1 output is 15tooth but has a smaller diameter to drive the 64tooth ring gear on the front diff. The particular evo 1 trans I have has a newer style center diff with the single tab lower oiling ring but has a different outer gear profile to a 92 and up center diff. I pulled a 90 center diff apart which is the old school two tab lower oiling ring and the outer gear profile matched the evo 1 and a 91 center diff I have.

I also found different gear profiles on the front output shaft and F.D. ring gear from a 91 trans vs 92.

*90-92+ Note all center diffs, front output, and front diff ring gears have the same tooth count and ratio but cannot be mixed and matched because of the way the gears are cut=gear profile.

90 and 91 have the same gear profiles on the front output and front diff ring gear. Have the same profile on the center diff outer gear but the inside of the center diffs is different when looking at the oiling shim.

This has been a rear learning experience it seems from 90-91-92 mitsu cross bread the particular transmissions I have. I hope some of this info helps someone else out. I have 4 transmissions tore apart right now including evo 1, 90,91,and 92. I really wanted to run the evo1 gearbox because of the hardened shift rails, steel shift forks, not to mention its close ratio with 8% taller 5th but it has been a pita.

 

[wgmiller]

I wonder if you got this figured out and fixed? I have a '92 Laser AWD with what I suspect is the same problem. Half a dozen mechanics have not been able to figure it out. I had a JDM engine and trans swap done on it several years ago, and it has exhibited strange symptoms ever since.