Tranny cooler

Bill.Barg · **Posted:** Wed Sep 26, 2007 3:25 pm

Has anyone installed an additional tranny cooler. i know that RetMil had described potential locations in earlier threads, near the front bumber , for instance.

B

gmctd · **Posted:** Wed Sep 26, 2007 5:36 pm

Try summitracingdotcom for some interesting products and options - check out the DeRale system, while you're there

Bill.Barg · **Posted:** Wed Sep 26, 2007 5:51 pm

Ya, GMCTD

Derale Frame Rail Transmission Fluid Coolers
Tube and Fin, Aluminum/ Copper, Black, 1 1/ 2 in. x 24 in. x 1 1/ 2 in., 28.95 Each

This would fit in the bumper space in the front, with easy access to the hoses, or it could go on the body frame under the vehicle, close to the tranny.

Nice.

gmctd · **Posted:** Wed Sep 26, 2007 6:20 pm

Also works very well in the return-fuel line...............

Bill.Barg · **Posted:** Wed Sep 26, 2007 6:59 pm

I still dont get the fuel cooling issue... what is the advantage?

chrispitude · **Posted:** Wed Sep 26, 2007 7:02 pm

Bill.Barg wrote:

Has anyone installed an additional tranny cooler. i know that RetMil had described potential locations in earlier threads, near the front bumber , for instance.

I was going to run up to my local transmission guy early next week and have him put it up on the lift and suggest some options.

- Chris

ed. · **Posted:** Wed Sep 26, 2007 7:11 pm

Would it make a difference to move the existing cooler up higher so all the fins are exposed instead of 1/2 of it?

BankNote4X4 · **Posted:** Wed Sep 26, 2007 7:25 pm

I used this:

https://www.jegs.com/webapp/wcs/stores/ ... aNyAAYWZ8I

I nylon Strapped it to the hard plastic subframe behind the drivers side grill. I had to pull the bumper to get it in but if you figure 8 the straps it holds it with zero movement. Also pretty close to the lines. I think it is a great set up. It also adds almost another Qt. (including some line drain when cut).

ed. · **Posted:** Wed Sep 26, 2007 7:27 pm

BankNote4X4 wrote:

I used this:

https://www.jegs.com/webapp/wcs/stores/ ... aNyAAYWZ8I

I nylon Strapped it to the hard plastic subframe behind the drivers side grill. I had to pull the bumper to get it in but if you figure 8 the straps it holds it with zero movement. Also pretty close to the lines. I think it is a great set up. It also adds almost another Qt. (including some line drain when cut).

They look affordable enough.
What size did you use?

Cowcatcher · **Posted:** Wed Sep 26, 2007 8:10 pm

Bill.Barg wrote:

I still dont get the fuel cooling issue... what is the advantage?

Bill,

An earlier discussion here and some field tests showed that under high heat conditons of ambiant temperature and after running, parking for a while, then running again the air accumulation issue grew worst. Temperature checks of the fuel in the return line to the tank were registering at 140 degrees F and perhaps over and the return of fuel to the tank, especially in a tank that was less than half full wa allowing well over 120 degree F fuel to the filter head. In one test, REMITAL I believe, in a clear prefilter bowl one could actually see air out gassing from the diesel at these high temps and this air would likely be accumulating in the filter head as a result causing the fuel starvation isues that many have experienced. The combination of lift pump and cooler helped eliminate that problem. Wheter it might have been eliminated by just the pump is still unknown as the outgassing under high heat may have been aggravated by the vacuum fuel delivery system.

BankNote4X4 · **Posted:** Wed Sep 26, 2007 8:46 pm

They look affordable enough.
What size did you use?[/quote]

I used the 130-70264. Also the low pressure drop feature keeps the atf+4 from circulating when cold. The viscous coupler allows increasing flow through as fluid temp rises (helps protects the tranny.

gmctd · **Posted:** Wed Sep 26, 2007 8:58 pm

Prolly all the swirling as the fuel passes from the tank to the head is what was causing the foam in the sight glass - Diesel fuel foams easily - hot Diesel fuel foams tremendously - the fuel lift pump is in the CRD injection pump, so the fuel source from tank to pump is always under slight vacuum - if the supply is pressurized, as with an electric auxilliary lift pump, the natural foaming would be way less of a problem - key, tho, is to install the auxilliary lift pump back near the source, which is the fuel tank, so the system from there thru the head to the IP is pressurized.

Associated problem is the hot return fuel from the high pressure CRD inj Pump and the excess fuel from the injectors - you'll notice the spillover points are all tied together by tubing - this fuel is very hot, averaging 140deg - 140deg fuel will almost foam by itself, just sitting statically in a container - if the heated return fuel is passed thru an efficient cooler, it will be at ambient temperature as it enters the fuel tank, reducing foaming in-tank and in the fuel supply system.

IMO, an auxilliary electric lift pump is required, and several others here think so, also, having installed one - the fuel return cooler is also a required necessity with the vhp CRD injection system

CD · **Posted:** Tue Oct 02, 2007 7:45 am

BankNote4X4 wrote:

I used this:

https://www.jegs.com/webapp/wcs/stores/ ... aNyAAYWZ8I

I nylon Strapped it to the hard plastic subframe behind the drivers side grill. I had to pull the bumper to get it in but if you figure 8 the straps it holds it with zero movement. Also pretty close to the lines. I think it is a great set up. It also adds almost another Qt. (including some line drain when cut).

Banks, do you have any pics or can you take a pic or tow of you fitting of the unit. It may be that I need a larger cooler, probabaly more the need than the may. Either way a pic of it'c connections & fitting would be great if you can.

CD

BankNote4X4 · **Posted:** Tue Oct 02, 2007 10:05 am

I'll get you some pics tomorrow morning and info on what I used- wife took camera to work today.

chrispitude · **Posted:** Tue Oct 02, 2007 3:52 pm

I took the CRD to my local transmission guy this morning, and given the layout and available space, he liked the idea of a frame rail cooler. He is going to look into some options and get back to me.

- Chris

Pablo · **Joined:** Thu Feb 02, 2006 10:06 pm **Posts:** 1201

chrispitude wrote:

I took the CRD to my local transmission guy this morning, and given the layout and available space, he liked the idea of a frame rail cooler. He is going to look into some options and get back to me.

- Chris

Be carefull if you wheel with that. I am thinking about a frame rail cooler for the fuel line, but tucking it under the skid plate is not going to get any air across it. I found one on summit racing that was a "heat sink" that did not require any air flow, but it had no indications on how much heat it would move.

BankNote4X4 · **Posted:** Wed Oct 03, 2007 10:38 pm

Here are some quick pictures

http://my.imageshack.us/v_images.php

(I belive the cooler line size is 3/8")
I used
2 double male ended barbed connectors
4' Transmission cooler line(transmission cooler line only)
6 Hose clamps
4 zip strips - get good quality & black would be a good color

I had to pull the front bumper mostly off to get the subframe pulled out enough to get the cooler behind.

I mounted the cooler backwards with the flang facing forward so it would butt up against the hard plastic grill subframe.
I "figure 8" the zip strips to create very little space between the zip and the frame: to keep wiggle down, plus it makes a spacer between the cooler an the sub frame
The bottom 2 zips i did the same but looped them around the extrusion at the bottom of the subframe grill to keep the cooler from moving up or down.

You want to run the cooler off of the "return" line from the factory cooler
(I THINK the one connected to the driver side is the return to the tranny- I started the truck and held onto both for 5-10 minutes to verify the return, its the one that will be cooler(after the fluid runs through the factory cooler)
Cut the line with enough line on both sides to get the barbed connectors to fit
the input from the return line goes into the drivers side of the cooler (because its backwards)
Run enough cooler line to keep it from kinking
Clamp er down
start it, check for leaks, go through the proper tranny fluid check procedure, and add ATF+4 till back to full: roughly 3/4 Quart

All in All pretty easy and works well
seems to help keep the tranny out of its hot mode for better performance/ longevity
also adds fluid volume which should help with cooling

Oh, and the 2nd picture show the top on my provent infront of the airbox (a little hard to see- its in the center at the bottom)- fits perfect and the line is all "down hill"
Bilge hose made the line routing easy- let me know if you want more info

gmctd · **Posted:** Wed Oct 03, 2007 11:04 pm

FYI - at transmission -

upper line is to cooler

lower line is from cooler

CD · **Posted:** Thu Oct 04, 2007 12:15 am

BankNote4X4 wrote:

I'll get you some pics tomorrow morning and info on what I used- wife took camera to work today.

Thanks mate.

ed. · **Posted:** Thu Oct 04, 2007 1:03 am

Hey Banknote, can you post the link to your images?
The one you posted is incorrect.

Thanks mate.

Tranny cooler

Who is online