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Old 09-09-2011, 09:34 PM   #1 (permalink)
jackb
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6.5l towing 24' trailer GA to CA

I'm moving from GA to CA in a few weeks, just bought a 24' trailer to get it done with. The trailer is dual axle with electric brakes. I don't know how much it weighs empty yet; I'm going to get it weighed the week after next. Probably going to have ~7,000 lbs in the trailer, plus the trailer weight. I'm totally ballparking that number right now, I am using this over as an opportunity to get rid of a lot of furniture, but I'll be keeping all my garage (that is, heavy and metal) stuff.

The truck already had fresh coolant, new power steering pump, 3.5y/o batteries, new Heath PMD, new harmonic balancer, rear disc brakes, "E" rated tires, pretty new injectors, 3"DP, 4" exhaust, and a freshly rebuilt transmission. It does have a bit of blowby, but passes the sucking-water-up-a-tube test with no issues. The turbo may or may not leak a bit of oil into the intake, and I have a turbo rebuild kit, but I won't have time to do it before I leave. I check the oil at every fillup.

I'm going to install a Tekonsha P3 brake controller for the trailer and probably change my rear differential fluid again. I also have a new crossover pipe that needs to be installed.

Probably going to replace the oil cooler with one from pmdable.com; The last thing I need is for a leak to start when I'm on the road.

Should I add a second transmission fluid cooler? What kind of temps should I expect to see pulling that much weight? (my temp sensor is in the pressure test port on the right side of the transmission)

Opinions on the oil cooler?
Opinions on the transmission cooler or temps to expect?
Opinions on anything else I'm not asking?

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1998 GMC 3500 Crew Cab 6.5 TD "F" engine ~151,000 miles
A/T, 4wd, SRW 4.10 rear axle, 2.5"/3"/4"cat-less Warpspeed exhast, Boost/EGT/Trans temp gauges
More details in "My Garage"
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Old 09-09-2011, 09:44 PM   #2 (permalink)
PrivatePilot
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Trailer probably weighs about 3000, so you're looking at 10K combined.

Install a pyro. ZERO question going that far, especially over the mountains.

The rest of the gauges are nice, but not essential. In order of my personal preference, tranny temp, oil temp, and finally boost.

With a 3500 6.5 with 4.11 gearing it'll do fine. Your disc conversion will make stopping easier for sure, but definately make sure the trailer brakes are 100% as you will need them in the mountains. Your 4" exhaust and other mods will all help in the task, you've done all the good stuff already.

Replacing the oil cooler & lines is a worthwhile investment regardless of what you're doing if you still have the stock garbage in there.

Transmission should be fine. A larger aftermarket cooler is *never* a bad idea - mine came with one installed courtesy of the PO, and even pulling steep mountain grades with the tranny down as far as second gear I've never seen temps over 220 - 240 is generally accepted as the critical "take action" temperature so 220 is fine. I usually see about 150-200 under normal towing.

Tranny temp gauge is dead easy to install on the 4L80E using the pressure test port - sensor will thread right in there. I'd seriously contemplate it, if nothing else but to give you some peace of mind on your fresh tranny.

All in all, make sure you get a good weight distributing hitch, and set forth - you shouldn't have any big issues - we hauled a 12K fiver to the west coast and back in '08 with my 97CCDRW- http://gowest.oshawapilot.ca

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SOLD: '97 C3500 Crew Cab Long Box Dually 6.5 Turbo Diesel.
Rebuilt with Navistar 506 block spring 2012
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Helping a friend: Duckies Longarm Quilting Oshawa / Durham Region!

Last edited by PrivatePilot; 09-09-2011 at 09:46 PM.
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Old 09-10-2011, 02:41 AM   #3 (permalink)
Ron Nielson
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Make darned sure your radiator stack (a/c condenser, intercooler, radiator) are clean and without any junk, debris, restriction. If you don't cool, your problems are just beginning. Keep everything cool, you're going to have a nice trip.
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Old 09-10-2011, 09:19 AM   #4 (permalink)
PrivatePilot
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Quote:
Originally Posted by Ron Nielson View Post
Make darned sure your radiator stack (a/c condenser, intercooler, radiator) are clean and without any junk, debris, restriction. If you don't cool, your problems are just beginning. Keep everything cool, you're going to have a nice trip.
Absolutely correct, I should have mentioned that.

You WILL overheat unless your cooling stack is in tip-top shape on a 6.5.
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Mark - Courtice, Ontario, Canada.
SOLD: '97 C3500 Crew Cab Long Box Dually 6.5 Turbo Diesel.
Rebuilt with Navistar 506 block spring 2012
Special thanks to Racer55 and WhiteK2500 for their invaluable assistance!
Helping a friend: Duckies Longarm Quilting Oshawa / Durham Region!
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Old 09-10-2011, 09:51 PM   #5 (permalink)
jackb
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I removed and cleaned the radiator before I drove from Alaska to Georgia back in 2007, the radiator was last out around Jan/Dec when I changed the power steering pump. It was clean, and that's when the coolant was changed, but I'll hit it with a hose and scrubbing bubbles or something like that again. I don't see a real need to pull it completely again. No A/C at all on the truck, so, one less thing to clean, haha.

I installed the EGT/Trans temp/Boost gauges also in 2007 for that drive. The boost gauge is currently disconnected though, because there was oil in the intake (either from blowby or the turbo, IDK, I did recently change the CDR though, just in case) and it was creeping up the boost line hose, so I disconnected it before it got to and ruined the gauge. Just EGT and trans temp for now.

I won't be home until next weekend, but I remember the tranmission cooling lines are rigid lines, not hoses, correct? So if I want to put a second cooler in line, how to adjust these rigid lines so the hose going from the rigid line to the second cooler can go around the radiator? I remember them lining right up to the ports on the radiator...
And should I just bypass the stock transmission cooler in the radiator, or have them run in sequence?
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1998 GMC 3500 Crew Cab 6.5 TD "F" engine ~151,000 miles
A/T, 4wd, SRW 4.10 rear axle, 2.5"/3"/4"cat-less Warpspeed exhast, Boost/EGT/Trans temp gauges
More details in "My Garage"
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Old 09-10-2011, 10:41 PM   #6 (permalink)
PrivatePilot
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How did I miss in your sig that you already had gauges?

Anyhow, when my PO replaced the stock cooler they just completely replaced it with a massive new one, completely removing the stock one. So, in effect, I still only have one cooler, but it's sizeable...and I have zero temp issues.
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Mark - Courtice, Ontario, Canada.
SOLD: '97 C3500 Crew Cab Long Box Dually 6.5 Turbo Diesel.
Rebuilt with Navistar 506 block spring 2012
Special thanks to Racer55 and WhiteK2500 for their invaluable assistance!
Helping a friend: Duckies Longarm Quilting Oshawa / Durham Region!
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Old 08-01-2015, 04:44 PM   #7 (permalink)
Helvie
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I have a 1998 3500 crew cab. 6.5 Turbo. Trying to tow a 24' boat, truck lacks power and when I get over 45 mph truck heats up to 230 degrees, but no power. Checked the dump on the turbo working fine. It almost seems like a wheel is dragging, lifted each wheel on truck and trailer no issues there. Mike
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