Tweaking the GM 298mm Converter

You’ll hear some very convincing arguments about how the selective (conical) plastic thrust spacer is used to adjust the stack height on the GM298mm.torque converter.您还将听到关于这种相同的选择性推力间隔物如何用于调节GM 298mm变矩器上的离合器释放间隙的一些非常令人信服的论据。乐动BBIN彩票事实是两个陈述都是正确的。选择性（锥形）塑料推力间隔件可用于在298转换器上调节堆叠高度和离合器释放间隙。

The selective (conical) plastic thrust spacer fills the void between the cover and the turbine hub. Spacers are made in six different thicknesses, numbered 2 through 7 (seeFigure 1). They vary in thickness between 14.6mm (.575") and 16.8mm (.661").

间隔物的不同厚度用于改变盖子和涡轮机毂之间的距离。O.D.间隔件具有O形环，其使得间隔物和TCC离合器板之间的液压密封。I.D.间隔物的间隔物在涡轮轴（输入）的光滑前表面上具有间隙。它与涡轮轴上的O形圈接触，也具有液压密封。

The front thrust surface of the spacer is in contact with the cover, and the rear thrust surface is in contact with the turbine hub. The turbine shaft, turbine hub, TCC clutch and conical spacer all rotate at the same speed. The conical spacer is not splined or affixed to the other members of the unit, but the drag of the 2 o-rings and the hydraulic force on the spacer keep it rotating with the other members. The damper assembly of the TCC clutch is splined to the turbine hub, so they rotate at the same speed. The distance between the cover and the turbine hub is governed by which selective thrust spacer has been chosen. Once the thrust spacer is in place, the distance between the two parts remains the same, but the TCC clutch is free to travel between the cover and the turbine hub. The TCC clutch is hydraulically forced forward for TCC apply and hydraulically forced rearward for TCC release.

为了检查离合器释放间隙，将选择性推力间隔物，优选用新鲜的O形环放入TCC离合器板中。将离合器板放入盖子中。离合器板的摩擦材料应搁置在盖子的配合表面上。推动选择性垫片（见Figure 2) down until it contacts the cover. This is the relative position of the spacer to the clutch plate while in TCC apply.

Gently remove the plate from the cover and measure the height of the spacer that protrudes above the cover (seeFigure 3). This particular measurement was about .090". Now take the clutch plate and place it onto the turbine hub. Push it down until the splines of the damper assembly bottom on the turbine hub. This will force the selective spacer up, exposing more of the spacer.

Again, measure the height of the spacer that protrudes above the cover. On this particular one (seeFigure 4）现在，它现在测量.140“。由于这是现在间隔物到TCC释放位置中的离合器板的相对位置，因此从测量2中减去测量1将是离合器释放间隙。在这种情况下，它是.050”。由于.030“至.060”是理想的离合器释放间隙，这款转换器将很好，只要平均整体高度在5.855最小值和5.905的最大测量范围内。如果您需要更少的清仓，您可以用更薄的清仓更换垫片，如果您需要更多的间隙，您可以使用更厚的间隔件更换垫片。幸运的是，当转换器的配合部件加工为真实的时，堆叠高度和释放间隙通常会变得较小。因此，通过数量或两种增加选择性间隔通常会使两种测量结果回到适当的规格。

The transmission rebuilder seldom sees the inside of the torque converter. He may not be aware of the damage he is causing by making his modifications. But on the other hand, when the converter rebuilder sees excessive wear between the selective spacer and the cover, (obviously too much converter pressure), he is not helping himself or the transmission rebuilder by not saying anything. This is where better communication is needed.