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Old 02-21-2005, 05:49 PM
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4L80E tailshaft housing

I just picked up a 4L80E out of a 2000 chevy truck. I am going to replace the 700r4 that is currently in my truck (1986 Chevy). My question is about the extension/tailshaft housing. The one I got originially had a two-piece driveshaft, with bolt-on yoke. Does anyone know if this can be replaced with a slip yoke? I haven't been able to find much on the subject. As far as I can see, all 4L80E's use the same rear seal and bushing. I also plan to install Transgo's stick shift kit. Anyone have experience with these?

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Old 02-22-2005, 09:01 AM
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4L80E transmissions work SO GOOD electronically, especially the later ones like you have. Get a FAST system an install it. I have done several of these installs at my shop. The programming software makes these trans work GREAT!
The output shaft on the 4L80 is yoke specific. To change to a slip yoke style will require complete trans disassembly. Rather than do that, have your driveshaft guy build the shaft with a slip spline in the shaft itself. It will work, and it is much simpler.
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Old 02-27-2005, 09:56 PM
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Well, after doing some more searching, I found the following information: Only two output shafts were used (2-wheel and 4-wheel drive), and there isn't a specific slip yoke tailshaft or housing. I may just use the bolt in yoke I have and have my driveshaft changed to include a slip joint. I am also going to build my own tranny controller, it will be manually shifted through forward gears by buttons the steering wheel. Should be pretty neat when finished.
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