trans cooler / lines

[bartz paul]

Larry:

While you're in this predicament, why don't you replace the lines. Clarence
Buskirk recommends rerouting the transmission coolant lines outboard running
along the frame. He recommended to me using Aeroquip plumbing.

Paul Bartz

From: LNelson208 [mailto:LNelson208]
Sent: Friday, February 26, 1999 3:23 PM
Subject: GMC: trans cooler / lines

Having drained 8 qts out of my tranny pan from a cold, and idle for weeks
GMC, I was going to use one of the posted methods of getting all the rest of
the dino trans fluid out by unhooking the return line at the trans and
running the engine until the stuff quit coming out.

However, my return line fittings were all boogered up which meant I had to
cut the line to unscrew the larger brass fitting at the trans.

No problem, says me, for I am going to replace the radiator cooling with a
large 24,000# rating trans cooler, and use trans hose to run to and fro.

"You don't want to do that", says the parts counter guy, he says to only use
the bare minimum of the rubber stuff.

So now, I am faced with repairing my line with a new piece and a flared
coupling. No problem, but I would like some input from those smarter than me
(that means each and every one of you) on his comment about the rubber trans
line.

 

[bartz paul]

Emery:

I believe you meant to say disagree vs. agree, right??? I'm with you on the
disagree, not only for the heat damage to the rubber tubing, but the stress
on it because of the effects of vibration on the steel tubing unsupported
weight.

On your cooler, how do you protect it from projectiles (e. g. small rocks
kicked up from vehicles in front of you, etc.) going through the grill? Or
isn't that the problem I'm imagining?

Paul Bartz

From: EMERYSTORA [mailto:EMERYSTORA]
Sent: Friday, February 26, 1999 3:57 PM
Subject: Re: GMC: trans cooler / lines

In a message dated 2/26/99 2:24:33 PM, LNelson208

You don't want to do that", says the parts counter guy, he says to only use
the bare minimum of the rubber stuff. So now, I am faced with repairing my
line with a new piece and a flared coupling.

I totally agree with your parts counter guy. Rubber gets old, especially
with heat, and you have a great possibility of losing your transmission. I
have an external transmission cooler which is in series with the one built
into the radiator. I purchased steel tubing from the auto parts and used
brass compression fittings. I also used brass adapters to go from the pipe
threads to the compression fittings. I mounted the external cooler just in
front of the radiator and bent tubing to go from the bottom radiator fitting
around the side of the radiator and into the external cooler. I used
another piece to go from the driver's side of the cooler and connected it
with the line from the transmission. I cut the original line at a point
where the new line could be easily connected with a compression joiner. I
don't remember what size line I use but I picked the same diameter as the
existing transmission oil lines.

 

[marcus mcgee]

Larry;

I'll add my .02 While you are doing this get the B&M oil cooler from Summit and
also the outboard oil filter. I mounted the filter on the rear engine bulkhead
and the large B&M in front of the radiator on the cross member useing some Stanley
90 degree braces. The filter is simply a precaution, give you an extra qt of tran
fluid to use, and also gives a convenient location for the temp sensor at the
hotest point of fluid, before it is cooled and returns to the pan. Go to a local
Aeroquip hose outlet and they will make up all 3 of the hoses you need. 1 short
from the outlet of the tranny to filter, from filter to cooler, cooler return to
tranny.

Marcus

> Having drained 8 qts out of my tranny pan from a cold, and idle for weeks GMC,
> I was going to use one of the posted methods of getting all the rest of the
> dino trans fluid out by unhooking the return line at the trans and running the
> engine until the stuff quit coming out. However, my return line fittings were
> all boogered up which meant I had to cut the line to unscrew the larger brass
> fitting at the trans. No problem, says me, for I am going to replace the
> radiator cooling with a large 24,000# rating trans cooler, and use trans hose
> to run to and fro. "You don't want to do that", says the parts counter guy, he
> says to only use the bare minimum of the rubber stuff. So now, I am faced with
> repairing my line with a new piece and a flared coupling. No problem, but I
> would like some input from those smarter than me (that means each and every
> one of you) on his comment about the rubber trans line. Thanks as always,
> Larry Nelson, PB 75, Springfield MO, age 51, 5'10", 200#, all parts except
> some wisdom teeth and many hair folicles. (more on this later)

 

[thomas g. warner]

Maybe we should add a pressure gauge as well as a temp gauge to the tranny
line so we can ensure that the pump is working?

>

>
>line from the transmission. I cut the original line at a point where the new
>line could be easily connected with a compression joiner. I don't remember
>what size line I use but I picked the same diameter as the existing
>transmission oil lines.
>
>Emery Stora
>77 Kingsley
>Santa Fe, NM
>
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach