904 lockup mod part number
#620033
02/21/10 05:36 PM
02/21/10 05:36 PM
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Joined: Jun 2008
Posts: 1,822 Colorado
denfireguy
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I have a 904 with a lockup torque converter. I need the part number for the new piston spring and cover that raises the speed where the lock up occurs. I am about to rebuild it and figure it is best to install the modification while it is in pieces. I am putting in new frictions and steels as well as a TF-2 shift modification kit for my Cuda. Thanks for your help. Craig
2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado
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Re: 904 lockup mod part number
[Re: John_Kunkel]
#620038
02/22/10 10:52 PM
02/22/10 10:52 PM
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Joined: Jun 2008
Posts: 1,822 Colorado
denfireguy
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Quote:
Here's the factory part, I doubt you'll find one.
Thanks for your help. You are right. Found where one used to be at Brad's NOS that Google brought up. Not on there page anymore. Craig
2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado
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Re: 904 lockup mod part number
[Re: denfireguy]
#620039
03/04/10 11:32 PM
03/04/10 11:32 PM
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Joined: Jun 2008
Posts: 1,822 Colorado
denfireguy
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OP
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Thought I would post more information that I found researching the Mopar modification in two service bulletins concerning shudder in 1978 era A904s with locking torque converters. The kit mentioned in my original post is long gone, no one has it in stock. The part number of the spring is 4202672 and can be found sporadically. It is in both bulletins for lockup shudder. Harder to find is the vented lock up body, its part number is 4302209. It was in the second bulletin. A workaround is the TF-TC shift improvement kit. If you have the unvented lock up module, step 6 drills two small holes that accomplishes the same thing bleeding off pressure. Step 10 replaces the spring in the lock up module that is the subject of both of the bulletins, including the vented lock up module not modified in step 6. The rest of the kit addresses the other common ills. I think I will go with the TF-2 kit for the rest and will just do the TF-TC mods for the lockup shudder raising the lockup to 40 Mph. It comes with some nifty drill bits for other uses. Hope this helps someone out. Craig
2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado
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