General Motors transmissions

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(TH400 model ID codes)
(TH2004R)
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==Four speed automatic==
 
==Four speed automatic==
  
===TH2004R===
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===2004R===
The TH2004R transmission is the same length as a 6 inch tail housing TH350 transmission. The TH2004R requires a TV cable hook up at the EFI or carb with the correct geometry for correct operation.
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The 2004R transmission is the same length as a 6 inch tail housing T-350 transmission. The 2004R requires a TV cable hook up at the EFI or carb with the correct geometry for correct operation.
 
[[File:1984_THM200R4_Pic_1B.jpg|none|frame|THM 2004R removed from a 1984 Delta 88 (GM B body).]]
 
[[File:1984_THM200R4_Pic_1B.jpg|none|frame|THM 2004R removed from a 1984 Delta 88 (GM B body).]]
  
The TH2004R uses a dual pattern bell housing and a 4-way connector.  If you are not using the ECM/TCM unit, then there are aftermarket kits sold that will operate the locking converter.  Unlike the TH200 which could be a locking or non-locking torque converter, all THM2004R transmissions used a locking converter.   
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Many 2004R uses a dual pattern bell housing and a 4-way connector.  If you are not using the ECM/TCM unit, then there are aftermarket kits sold that will operate the locking converter.  Unlike the T-200 which could be a locking or non-locking torque converter, all 2004R transmissions used a locking converter.   
  
 
In custom/non original applications, an [https://www.summitracing.com/parts/aww-500412/overview/ inexpensive lock up kit] will simplify installation, the instructions in the kit are reported as being vague, so further research may be needed.
 
In custom/non original applications, an [https://www.summitracing.com/parts/aww-500412/overview/ inexpensive lock up kit] will simplify installation, the instructions in the kit are reported as being vague, so further research may be needed.

Revision as of 15:31, 25 August 2023

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