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09-22-2014, 05:30 PM | #1 |
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Join Date: Jun 2009
Location: Phoenix AZ
Posts: 4,592
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Questions about differences in 4l80e transmission pans
Well the weather is finally cool enough where it isn't getting over 100 degrees so I am ready to get a few things done on my truck. The transmission pan that is in my truck does not have a drain plug. Since I need to change the fluid and filter I would like to put a factory pan on it with a drain plug. I looked on Ebay and it shows early and late pans. It seems the late pans come with a drain plug. Is there a reason one of these wouldn't work on my early transmission? I would appreciate any input. I am hoping to have most of the stuff done by Dino's show in November so I need to get moving on it.
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AZPartsLocators on Instagram 1972 Cheyenne Super Short Bed big block "Blackie" 1977 Crew Cab GMC Short bed with 4BT Intercooled Cummins Diesel and a 4L80e "The Junkyard Dog" 1985 Crew Cab Chevy dually with 5.9 Cummins "The Big Dog" This is what my dad liked to be called by the grandkids before he passed so it seems fitting for his old truck. |
09-22-2014, 06:57 PM | #2 |
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Join Date: Oct 2011
Location: Wildomar, CA
Posts: 466
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Re: Questions about differences in 4l80e transmission pans
Should be the same. No changes made to the mounting surface / bolt configuration. Only difference was some of the later model pans (1997+) have a slight angle up to the rear of the pan mounting surface rather than being flat across the entire length of the pan. I prefer the earlier pans since the essentially hold slightly more fluid. Here is a link of an earlier pan you can purchase with a drain plug installed.
http://www.gmcopo.com/4l80etransmissions.htm Here are the later pans: http://northeasterntransparts.com/wp...8953542331.jpg |
09-23-2014, 02:45 PM | #3 | |
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Re: Questions about differences in 4l80e transmission pans
Quote:
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AZPartsLocators on Instagram 1972 Cheyenne Super Short Bed big block "Blackie" 1977 Crew Cab GMC Short bed with 4BT Intercooled Cummins Diesel and a 4L80e "The Junkyard Dog" 1985 Crew Cab Chevy dually with 5.9 Cummins "The Big Dog" This is what my dad liked to be called by the grandkids before he passed so it seems fitting for his old truck. |
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09-25-2014, 04:24 PM | #4 |
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Join Date: Dec 2013
Location: Columbus, Oh
Posts: 366
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Re: Questions about differences in 4l80e transmission pans
The Late pan will not fit on the early transmission. There was a change in the lube circuits in the 97 and up transmissions. The 91-96 transmissions had a tube running from the front of the valve body to the rear case bearing which will not clear the late pan. I would recommend using a deep aluminum pan like what is pictured here. Does not leak, runs cooler and has a drain plug. You can PM me for more info on the aluminum pan.
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09-25-2014, 04:31 PM | #5 | |
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Join Date: Jun 2009
Location: Phoenix AZ
Posts: 4,592
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Re: Questions about differences in 4l80e transmission pans
Quote:
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AZPartsLocators on Instagram 1972 Cheyenne Super Short Bed big block "Blackie" 1977 Crew Cab GMC Short bed with 4BT Intercooled Cummins Diesel and a 4L80e "The Junkyard Dog" 1985 Crew Cab Chevy dually with 5.9 Cummins "The Big Dog" This is what my dad liked to be called by the grandkids before he passed so it seems fitting for his old truck. |
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09-25-2014, 04:35 PM | #6 | |
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Join Date: Oct 2011
Location: Wildomar, CA
Posts: 466
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Re: Questions about differences in 4l80e transmission pans
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