Kickin’Chicken Posted May 23 Share Posted May 23 4x4, automatic and 4.0. so I ordered the tank - the only tank - that I concluded was original in the truck, since mine was full of rust. I also ordered a new sending unit/pump that appears to match that tank. Anyway, I just removed the tank to dispose of and it has a 16 gallon tag on it? Should I reverse course and order another 16 gallon or will the 23.5 work? TIA and a pic of the tank …. Link to comment Share on other sites More sharing options...
Kickin’Chicken Posted May 23 Author Share Posted May 23 Here’s a pic of the tag: Link to comment Share on other sites More sharing options...
coheed Posted May 23 Share Posted May 23 So the 16 and the 23 are actually the same size. The vent tube is just lower in the tank making it so you can't fill it up as much. I had a 16 in my 86 and swapped a 23 in with no issues. Link to comment Share on other sites More sharing options...
89 MJ Posted May 23 Share Posted May 23 You might need to swap to the sending unit for the 23 gallon tank though, if I recall correctly. Link to comment Share on other sites More sharing options...
JeepSchmidt O'Guinness Posted May 23 Share Posted May 23 If your oem 16gal had three straps the 23 gal should fit inplace without issue. Shortwheelbase used a smaller 16gal tank with only two straps that don't match the placemen of the 23gal long wheel base. Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 23 Share Posted May 23 6 minutes ago, JeepSchmidt O'Guinness said: If your oem 16gal had three straps the 23 gal should fit inplace without issue. Shortwheelbase used a smaller 16gal tank with only two straps that don't match the placemen of the 23gal long wheel base. Youre thinking of the 18 gallon tank. Link to comment Share on other sites More sharing options...
JeepSchmidt O'Guinness Posted May 23 Share Posted May 23 I thought something seemed off when writing 16. Thx Link to comment Share on other sites More sharing options...
Kickin’Chicken Posted May 23 Author Share Posted May 23 57 minutes ago, JeepSchmidt O'Guinness said: If your oem 16gal had three straps the 23 gal should fit inplace without issue. Shortwheelbase used a smaller 16gal tank with only two straps that don't match the placemen of the 23gal long wheel base. Yes. It has 3 straps!👍 Thanks 😁 Link to comment Share on other sites More sharing options...
TurboedMJ Posted May 24 Share Posted May 24 12 hours ago, coheed said: So the 16 and the 23 are actually the same size. The vent tube is just lower in the tank making it so you can't fill it up as much. I had a 16 in my 86 and swapped a 23 in with no issues. What on earth? Even if we're talking about the 18 gal tank, why would Jeep do that? Makes no sense. Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 24 Share Posted May 24 1 hour ago, TurboedMJ said: Even if we're talking about the 18 gal tank, why would Jeep do that? Makes no sense. Costs. Its cheaper to put a baffle in a tank with higher capacity than it is to make a new tank. 18 gallon tank had to be made specifically for the short box Link to comment Share on other sites More sharing options...
TurboedMJ Posted May 24 Share Posted May 24 44 minutes ago, eaglescout526 said: Costs. Its cheaper to put a baffle in a tank with higher capacity than it is to make a new tank. 18 gallon tank had to be mad specifically for the short box My point was, why not just have only the 23 gallon tank if the 18 is the same external size? Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 24 Share Posted May 24 14 minutes ago, TurboedMJ said: My point was, why not just have only the 23 gallon tank if the 18 is the same external size? Its not though. 16 and 23 are the same externally. 18 is smaller than the 23/16 gallon tank and for the short beds only. Were talking about AMC here. They did the same exact thing with the XJ by offering a 13 gallon tank and a 20 gallon and its the exact same externally. Link to comment Share on other sites More sharing options...
TurboedMJ Posted May 24 Share Posted May 24 4 minutes ago, eaglescout526 said: Its not though. 16 and 23 are the same externally. 18 is smaller than the 23/16 gallon tank and for the short beds only. Were talking about AMC here. They did the same exact thing with the XJ by offering a 13 gallon tank and a 20 gallon and its the exact same externally. Oh ok, I thought the 18 and the 23 were the same. I guess I will never know AMC's reasoning for some things. Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 24 Share Posted May 24 1 minute ago, TurboedMJ said: Oh ok, I thought the 18 and the 23 were the same. I guess I will never know AMC's reasoning for some things. Yup. Only the 16 and 23 are the same externally. I think the easy answer for a lot of AMC's reasons is cost. Link to comment Share on other sites More sharing options...
Pete M Posted May 24 Share Posted May 24 so they can bill an upcharge for allowing more gas in the same tank. Link to comment Share on other sites More sharing options...
Eagle_SX4 Posted May 24 Share Posted May 24 9 minutes ago, eaglescout526 said: Yup. Only the 16 and 23 are the same externally. I think the easy answer for a lot of AMC's reasons is cost. I don't think it was cost of manufacturing because the 16 gallon actually used longer pipes to limit the capacity vs the 23 that used shorter ones. I think AMC just did it to have another option they could make more money from. I think the bottom line is AMC could charge more for something that actually cost less to make. Link to comment Share on other sites More sharing options...
watchamakalit Posted May 24 Share Posted May 24 6 hours ago, Eagle_SX4 said: I don't think it was cost of manufacturing because the 16 gallon actually used longer pipes to limit the capacity vs the 23 that used shorter ones. I think AMC just did it to have another option they could make more money from. I think the bottom line is AMC could charge more for something that actually cost less to make. I would seriously question AMC doing something just to make money. If that was their motivation, where did it all go wrong? Link to comment Share on other sites More sharing options...
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