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S5 vs S4 TII Tranny's, different part numbers?

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Old 03-04-03, 03:25 PM
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S5 vs S4 TII Tranny's, different part numbers?

Ok, I'm confused. I thought there was no difference between the two tranny's except for, perhaps, the mount that bolts onto the tranny that in turn is what you attach the cross member to. I know the S5 mount can be unbolted and exact fit onto a S4 Tranny as far as NA's are concerned.

So, question on the table, exactly what makes the S4 and S5 Tranny's different that they would have different part numbers?
Old 03-04-03, 06:40 PM
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5th gear mostly...

I have heard unconfirmed rumor that the M50N (S4 'vert and S5 coupes and 'verts) used slightly stronger syncros and gears, over the M582 (found on all the non-auto tranny, non turbo S4 coupes), but I have never been able to confirm that with anyone.

Maybe someone that has pulled apart a couple of these enough to know the difference can confirm it.
Old 03-04-03, 06:47 PM
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Originally posted by Icemark
5th gear mostly...

I have heard unconfirmed rumor that the M50N (S4 'vert and S5 coupes and 'verts) used slightly stronger syncros and gears, over the M582 (found on all the non-auto tranny, non turbo S4 coupes), but I have never been able to confirm that with anyone.

Maybe someone that has pulled apart a couple of these enough to know the difference can confirm it.
as far as i remember the synchros are the same part numbers thru the years. there are small differences, like the 89's have that barrel shaped thing added to the mainshaft

mike
Old 03-04-03, 09:02 PM
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89's have that barrel shaped thing added to the mainshaft

Is this true for either NA or TII tranny's?

I remember the rebuilder at Anaheim Gear saying something about that thing, but can't remember what the merit was of it being there.
Old 03-05-03, 12:22 AM
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Gear Spacing is different between S4 and S5. By this, I mean that the space between the rows while shifting (1-2, 3-4, 5-R) is different. S4 on the left, S5 on the right.




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