w-50 to w- 58 Someone help fast! Damon? MK1 Guru's!!!??

[LowRisksCC]

Heres the deal.

I have a 1981 Supra.w-50 5 speed is blown. I had a w-58 out of a 87 Supra. I was under the impression that these transmissions were interchangable from the big info sticky. My mechanic and I measures both trannies....perfect. However.....it doesn't work, so he said.

He said the slave cyl does not bolt up, and that its not going to work and I need to find a w-50. Whats the real deal on this? Im using the stock 5m-e motor. Can I just swap the slave cyl for a MKIII? I need the info asap.....im tying up a lift and pissing away money. If someone has an instant answer please feel free to call my cell phone 24-7 I will get up and talk. 305-304-5357 - Zach

[oldmate]

Hi,ALL M series manual bell housings should be the same,maybe the slave cyl stroke needs to be taken into consideration,meaning that some slave cyls have different lenght rods in them.The only other thing to worry about is what position the shift is at,forward,mid or rear?,on the extension housing at rear of box,let me know how you go,should be easy.

[discoelk]

What about a w58 slave cyl.?

[oldmate]

In my exeriences,the rod inside the slave cyl,i have found to be a variations of lenght,which determines how far the rod pushes when the clutch pedal is engaged.On the other hand it shouldn't matter what toyota it comes off,as long as it bolts up correctly and the rod is long enough to do the job,when the pedal is engaged,also as long as it is in line with the clutch fork correctly.

[kdsii]

IIRC the shifter location on the MkIII W58 is in a different location than the MkII W58 (and also the W50 in a MkI). Your W58 came out of an '87 which would be a MkIII, thus different than the one in your car.

If that is the issue, it can be changed (with the right parts).

[LowRisksCC]

IIRC the shifter location on the MkIII W58 is in a different location than the MkII W58 (and also the W50 in a MkI). Your W58 came out of an '87 which would be a MkIII, thus different than the one in your car.

If that is the issue, it can be changed (with the right parts).

Negative, the shifter is in the exact same location.

[Junkie]

As mentioned above, get the correct slave. If the "mechanic" says it won't bolt up, all I/we can guess, is the bolt pattern is different. New MKII/MKIII slave is <$30 at Autozone,etc. Only other issue I could think of, would be if the lines are the same thread/length. But, since I don't have access to a 5spd MKI, I have no way of comparing.

Other thoughts --- If the "mechanic" can't figure out this little bit, maybe he isn't the right person for the job ???

[LowRisksCC]

Im going to get on the phone with him tommarow and have him explain exactly whats not working. I've used this guy in the past, he has always done A+ work on my cars, very old school mechanic..... Im hoping its just the slave cyl and that it can be swapped. Has anyone ever done this swap?

[turbo MKI]

Im going to get on the phone with him tommarow and have him explain exactly whats not working. I've used this guy in the past, he has always done A+ work on my cars, very old school mechanic..... Im hoping its just the slave cyl and that it can be swapped. Has anyone ever done this swap?

Yes, I actually did this - my '81 PP MKI has a '85 W-58 in it and the '81 turbo had a '89 W-58 in it - the PP was originally a W-50 car but the 7M-GTE'd '81 was originally an auto... There really is no trick to this - no idea why your guy is having any issues. I dont remember exactly which slave I used when I converted my PP as I did this back in the mid '90s or so, but it couldnt of been anything too complicated - I ended up using parts I already had to make it work - I didnt need to buy anything special or fabricate anything. Any MKI, MKII or MKIII slave will interchange - just need to match up everything to the rest of your set up depending on which clutch fork, TOB etc... you are using. And as others have mentioned, you might need to just use a different length rod to make it work perfect but all in all, its really not a big issue.

[LowRisksCC]

Im going to try to meet with my mechanic tommarow and find out exactly whats going on. I was reading that the w-50 is steel case, and the w-58 is alm. and because of that the patterns are different and nothing lines up. Idk man....id hate to loose this project on a count of a bullshit transmission.