Identifying Allison 1000/2000/2400 Valve Bodies

Over the years, the Allison 1000/2000/2400 valve body has had four versions. This article is written to help identify each version. The first two versions are 5-speed and the last two are 6-speed valve bodies. The information will explain casting number and separator plate combinations that work correctly together.

2001-2003（5速）

Figure 1	Figure 2

2004-2005（5速）

Figure 3	Figure 4
Modulated main pressure housing with no hole for tube fits ‘04-‘05 5-speed transmission.

2006–2009 (6-Speed)

• 上铸造＃29542971（较小的部分）
• Lower casting #29543340 (larger section)
• 垫片板冲压＃2962，GM部件号为29542962
• 调制的主压力外壳铸造＃29539796。这是G螺线管适合于管道的最小部分并在管的拐角处具有孔（图5）。
• 身份标识：5速阀体始终在阀体底部具有反向管。6速度具有从调制主压力壳体到下铸件的额外管（Figure 5）。6速还具有不同的TCC电磁阀，具有红色塑料电连接器和不同的PCS-1和PCS-2螺线管。
• '06 -'09内部线束GM部件号是29543334

Figure 5

2010年后（6速）

• Fully variable modulated main pressure was a new feature for 2010.
• 重新设计铸件以接受新阀门，并具有新的蠕虫轨道。
• 转换阀SV1，SV2和SV3和控制主阀门被重新设计。
• 重新设计PCS1和PCS2阀，螺线管和电磁座括号。
• Upper body casting #29550905
• Lower body casting #29550908
• 分离板被重新设计，新的部件号为29545980.用部分编号的最后四位数字“5980”冲压。
• 魔法石,第1章,SS2和SS3螺线管都蚀刻the number 6833.
• PCS-1和MMS螺线管均具有黑色塑料电连接器和螺线管侧面的29541895。
• PCS-2螺线管具有棕色塑料电连接器，电磁阀侧的数量29541896罐。
• TCC电磁阀具有红色电连接器和螺线管侧的数字29541898
• The internal harness was changed and the GM part number is 29545308.
• 身份标识：There are NO TUBES on the bottom of the valve body. There is no longer a modulated main pressure housing, and solenoid G has been eliminated. Solenoid G was replaced by the main modulator solenoid, which is a PWM solenoid (图6和7）。

Figure 6	Figure 7

乍看上去

• '01 -'03：5速，底部和六个螺线管
• '04 -'05：5速，底部和七个螺线管
• ‘06-‘09: 6-speed, two tubes on the bottom
• '10 -'15：6速度，底部没有管

公共阀门身体问题

1. The most common problem with the ‘01-‘09 Allison 1000/2000/2400 valve bodies is the sticking E-shift valve, or as it is called on the ‘06-‘09 6-speeds, shift valve 3. On the inboard end of the bore, the bore becomes damaged and causes the valve to stick. When this valve sticks — even for a split second — the TCM sees that the pressure switch does not change state, it sets trouble code P0872 and thetransmissiongoes into failsafe. The maddening part of this is that the valve can be free one minute and stuck the next. There is now an oversized valve and reamer kit to fix this so that it will not stick again. The new oversized E-shift valve will work in the 5-speeds and the ‘06-’09 6-speed.
2. 第二个最常见的问题是F形饰阀套。套筒内径磨损，引起TCC浪涌，TCC滑动和故障代码P0741 - TCC滑动。当锁定停止工作和P0741码组时，转矩转换器可以过热传动流体，导致变矩器损坏并快速劣化传动流体。乐动BBIN彩票F-Trim阀套仅在02 -04中使用。
3. 第三个最常见的问题是扭曲的铸件。除了'10 -later外，这些阀体不使用分离板垫圈，因此这两个阀门的一半是平坦的，以避免交叉泄漏。需要将销钉销拆卸到平坦的砂阀体上。如果有虎钳和橡胶锤，可以轻松移除销钉引脚。轻轻地挡住销钉销上的副脚（Figure 8）。这将需要一点审判和错误来了解收紧副的紧张程度。然后使用橡胶槌敲击阀体以将阀体与定位销分离（Figure 9）。别忘了挂在阀门身上！

Figure 8	Figure 9

After removing the dowel pins, they may be a little distorted. Use a file to remove any marks that were made by the vice.

The ‘10-later 6-speeds have been holding up well. Currently there are no common problems with this new design.