I ahve been researching this for myself for a while. A few things are confusing me though.


I have the 2003 Duramax and it has a restricter in it so only the small nozzle fits in correctly. There are some pumps with larger nozzles i can use but slowly, and there are some I really can not use because they over flow or stop constantly even though I make it go very slowly.


My brother has a 2004 and he HAS NOT RESTRICTER IN HIS FILLER TUBE so he goes to the big boy tanks. I ordered the filler hose for his vehicle and it seemed like it would be perfect BUT it has an external vent tube which my tank had no place to hook it up.


I am seeing some people saying they have 2004 Chevys with narrow filler tubes and wonder what is different about my brother's that he got the big filler tube? Came that way on delivery and he did not know enough to order it specially.


I want to be able to go to the big boy tanks because I pull a fifthwheel and when you are going to the regular pumps and only one is diesel and you pull into the one you THINK is the diesel and it is not it is not easy to back out and find the right one. THe big boys are all together and you just take the next vacant one. I am not looking for quick but want to be able to diesel up with my brother when we travel together and not be searching out which nozzle is it this time is the diesel, is it the green one? the yellow one? sh------------t.


Transfer flow has one for us, it is a tube with a vent that runs the side of it and the vent goes back into the inner tube just before entering the tank and it enters the tank at such and angle that the it vents from a air space or something like that.


Some one wrote me her husband fashioned a funnel from PVC piping to fill up at big boy tanks without a mess and it stopping all the time.

Mine is an 02. It tended to puke a lot on the big boys side. I did upgrade to the transflo unit and upon change out, noticed that the metal portion of the assy appears to be identical on both ~ so, thats to say there is no metal restrictor at least by my experience. There is a plastic inner tube that directes fuel to the bottom that can restrict the large nozzels. Several have eliminated the plastic portion and are happy. I haven't yet tried the truck pump on mine since the transflo retrofit but suspect there will continue to be foaming/puking at least at the high flow rate (nature of diesel and the container/tank is relatively small) but someone else can jump in and give you better input.

Buy the Transfer flow fill neck kit. You can install it in about an hour. Works great, although I only use the first detent on the fast flow pumps. That still is faster than the small nozzel at a regular station. I used to have overflow problems on a regular basis, until installing the transfer flow kit.

bump.Edited by: PBR803

<TABLE id=HB_Mail_Container height="100%" cellSpacing=0 cellPadding=0 width="100%" border=0 UNABLE="on">
<T>
<TR height="100%" UNABLE="on" width="100%">
<TD id=HB_Focus_Element vAlign=top width="100%" background="" height=250 UNABLE="off">pilot...where can i buy a transfer flow kit, and how does it work?</TD></TR>
<TR UNABLE="on" hb_tag="1">
<TD style="FONT-SIZE: 1pt" height=1 UNABLE="on">
<DIV id=hotbar_promo></DIV></TD></TR></T></TABLE>
<BLOCKQUOTE id=89be2fb9>
<TABLE id=HB_Mail_Container height="100%" cellSpacing=0 cellPadding=0 width="100%" border=0 UNABLE="on">
<T>
<TR height="100%" UNABLE="on" width="100%">
<TD id=HB_Focus_Element vAlign=top width="100%" background="" height=250 UNABLE="off"></TD></TR>
<TR UNABLE="on" hb_tag="1">
<TD style="FONT-SIZE: 1pt" height=1 UNABLE="on">
<DIV id=hotbar_promo></DIV></TD></TR></T></TABLE></BLOCKQUOTE>

Didn't Mackin have a post on the kit a little while back?


Here's the site. http://www.transferflow.com/html/gm_fillneck_kits.html

RVER,


I installed one of the TFI fill necks on my truck for when I pull our 5er. It makes a world of difference. I could use the high flow pumps before, but got tired of having diesel splash back and then smelling it on the trip.


Here is the link to Mackin's post. http://dieselplace.com/forum/forum_posts.asp?TID=12500&amp;K (http://dieselplace.com/forum/forum_posts.asp?TID=12500&amp;KW=tfi+fill+neck) W=tfi+fill+neck


I followed the advice of Aggie 91 and just cut the hose at 1 inch off of the frame instead of cutting the slice out of it. It took about an hour to install. I found taking the rear tire off made it much easier for me to get my fat butt in there to move around.


If you have any questions PM me.

Mine is an 02. It tended to puke a lot on the big boys side. I did upgrade to the transflo unit and upon change out, noticed that the metal portion of the assy appears to be identical on both ~ so, thats to say there is no metal restrictor at least by my experience. There is a plastic inner tube that directes fuel to the bottom that can restrict the large nozzels. Several have eliminated the plastic portion and are happy. I haven't yet tried the truck pump on mine since the transflo retrofit but suspect there will continue to be foaming/puking at least at the high flow rate (nature of diesel and the container/tank is relatively small) but someone else can jump in and give you better input.





That plastic tube inside the hose helps to prevent fuel tank condensation. IMO I would rather leave it in place even if it slows down the fillups a bit.

???


Hmm, perhaps my language wasn't clear. I think what I called the inner tube (as a long 1" dia hard plastic tube w/flex joints) is what you call a hose? Either way ~ its a singular item (nothing inside of it). It provides a flow path for the fuel. IT served as the restriction to the big boy nozzles on my unit. Perhaps my use of the word 'inner' is misleading as I used the word to mean/indicate its lengthy extension into and to the bottom of the fuel cell.


The fuel cell is a closed system and condensation issures are addressed by the water separator.


I did fuel up using the transflo today ~ it was a big improvement over oem. Still, due to the foaming nature of diesel, I was able to trickle fill another gallon after the initial clik/shut off. But it didn't puke or cause spillage. I did not use the fast fill rate as it was my first time.

The inner plastic tube that goes to the bottom of the tank. Thats it. It keeps a liquid seal to minimize air contact with the fuel.

If thats the case, the foaming/puking would seem to indicate its not working well. The transflo unit simply allows the fuel to spill into the tank. Wonder if the general could make a case for warranty denial for moisture induction as result of this aftermarket upgrade. My luck, it would happen to me http://www.dieselplace.com/forum/smileys/smiley2.gif Edited by: ShumDit

Ok, I ordered the 75 gallon supertank and it should be here this week. I was just going through these posts and this topic caught my eye, as I only have the small filler neck. Without the large filler neck I can only imagine how much time I will be spending at the pumps to full up. It sounds like everyone is happy with this upgrade so far. My question is, would it be easier to install this with the tank dropped? If so, I will order one first thing Monday morning and install it with my tank at the same time. If it makes no difference at all, I should wait for another paycheck before I order. http://www.dieselplace.com/forum/smileys/hihi.gif


Thanks, Jeff


By the way, if no one read my ad in the accessories section, supertanks has a warehouse of the old style 75 gallon tanks they are trying to get rid of them. They are selling them for $500 + shipping. Or you can order the new style 70 gallon for $825 + shipping. Hmmm, $325 savings for an additional 5 gallons of fuel...http://www.dieselplace.com/forum/smileys/smiley14.gif

So, No one has made a homemade solution to wanting to use the big boy diesel tanks. I see everyone likes the Transfer flow fuel filler neck and hose to tank. IT goes into the outer tube that already is on the Chevy. As I understand it, they have you take out the inner tubing from the OEM and substitute their larger filler tubing which is successful. I was looking for home solutions/


Thankshttp://www.dieselplace.com/forum/smileys/smiley1.gif

My brother has a 2004 and he HAS NOT RESTRICTER IN HIS FILLER TUBE so he goes to the big boy tanks. I ordered the filler hose for his vehicle and it seemed like it would be perfect BUT it has an external vent tube which my tank had no place to hook it up.








The entire fuel tank was changed mid year to address the issue of filling at OTR pumps. The filler neck from the new style tank will not fit on the old style tank. You would have to purchase the whole tank assembly or some after market neck. Do a search on my user name to see the posting which includes some emails from the fuel engineers when I brought the issue to thier attention.