ping GG tranny questions

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gary, ill soon be travelling over 2000 miles to tow over 9000 pounds (total loaded weight of trailer) back to billings. 2000 miles is a looong way in 3rd
gear. is there _anything_ i can do on my '01.5 cummins that will enable me to safely use overdrive? would a fan blown external cooler do the trick? anything i could do on my '04.5 cummins?
......this is why my '02 dually (purchase pending) will have a 6 speed. the cummins doesnt like 85mph in 3rd gear. thanks,
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Nathan W. Collier
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Do you really think traveling at 85 MPH with over 9000 pounds behind you is a good idea?
--
If at first you don't succeed, you're not cut out for skydiving


"Nathan W. Collier" < snipped-for-privacy@aol.com> wrote in message
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just a guess, youve never been to montana?
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Nathan W. Collier
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That would be correct but a blowout on a front tire at that speed with a trailer that heavy gets you just as dead, regardless of the landscape.
--
If at first you don't succeed, you're not cut out for skydiving


"Nathan W. Collier" < snipped-for-privacy@aol.com> wrote in message
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as would a blowout at 70, or 60 for that matter. the same goes for the cummins too.....it doesnt like 70 in 3rd either so the same applies.
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Nathan W. Collier
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Your six speed CTD won't like 85 in fifth either:)
Al
2004 600 CTD, six speed, 4X4.
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thanks to edge the power wont be the limiting factor. i just dont wanna kill a tranny over it.
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Nate, lemme stick my .02 in here.
If I had to choose, I'd pull it with the 04, since its got the better HP, but also because its got the 48RE, which is a couple of steps better than the 47RE in the 01. In particular, the 48 has more clutches in the OD unit, and a stronger planetary set.
As to your cooler, I'd definitely run an aux. cooler, mounted as far from the A/C condenser as possible. At 80MPH, a fan is probably useless, since I doubt any electric fan could move air that fast.
Not sure how much effect, or if its compatible with the Cummins engine management, but I'd also put a cooler T'stat in there, which will lower the coolant temp that flows over the radiator tank mounted cooler, if so equipped.
I'd also install a trans temp guage, just to monitor the temp. Better to stop and relax over dinner than be stopped in the middle of nowhere and wonder if you will get dinner.
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Max

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Amen on the trans temp gauge, but your '04 CTD w/48RE should be just fine, thank you, towing in OD as long as the tranny doesn't hunt often. I tow about that with my '03 all the time and the trans temp barely rises over 140 degrees. Your 01' should be OK too.
Mike

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Forgot to mention that my '00 does very well with 7000lbs in OD, and I live in the hills of PA.
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Max

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in overdrive? what is it people are doing that gave the 47re such a bad name?
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On Sun, 12 Jun 2005 12:52:43 -0600, "Nathan W. Collier"

Maybe it's the "aww, shit" factor - you know, the one that says "One Aww Shit is louder than a bunch of attaboys"?
I cruise at about 65mph with my 12,000 lb fiver in overdrive until it starts hunting for a lower gear - and that takes a lot more than just the grade going up an overpass on the freeway. I have the fluids and filters on the tranny changed in accordance with the owner's manual recommendations and specifically ask the mechanic (not the service writer or manager) if he found anything "unusual, like shavings or chips" when he pulled the pan. Nothing bad has happened so far.
Greg '98 3500 QC 4x2 Cummins ISB, Auto, 3.54:1, Driftwood with Leather and all the heavy duty options. '89 Nu-Wa Champagne Edition, 34 foot Fifth Wheel.
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youre pulling 12k on the 3.54 gears? how does it do? any mountain driving?
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On Sun, 12 Jun 2005 18:26:00 -0600, "Nathan W. Collier"

I bought the trailer in Benson, AZ right after I got the truck and towed it back home to Norfolk. Lowest speed I saw was about 40 mph north/east bound on the big hill going north out of Las Cruces, NM towards Alamogordo. Ditto for going westbound over Black's Mountain in North Carolina on I-40(?).
Caught the wife napping in Oklahoma, so I opened it up and it runs real nice at 85 with the trailer on the flats.
Most of the stuff since then has been up and down the east coast with a few trips to Tennessee. I get around 13-13.5 towing at 65 mph.
I'm happy with the combo, but intend to trade off both when I retire in a couple years and start my retirement with two fresh vehicles for full-timing.
Greg '98 3500 QC 4x2 Cummins ISB, Auto, 3.54:1, Driftwood with Leather and all the heavy duty options. '89 Nu-Wa Champagne Edition, 34 foot Fifth Wheel.
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Driving it like its a sports car does that. The Cummins Dodge is equipment, not a common commuter. Drive it like it cannot fail, and it will. Drive it with respect, like it can damage itself and anything in its path, and it'll perform for a lifetime.
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Max

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agreed. if possible however, id like to be able to do it with either truck, _if_ gg can come up with something where it could be done without blowing a tranny.

i looked at a couple different setups and they were all mounted under the truck bed with the fan blowing up. these were on a couple street legal ford racing trucks with diesels. i was hoping this would also work for my application.
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Nate, I know Gary is a advocate for aux coolers and stuff, but with the Cummins I doubt you will have the need. I've moved a plow over a hundred miles in 85 degree weather and the temp and trans did just fine. One thing that DC didn't screw up was the cooling on the Cummins, gas engines may be a different story.
Roy
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I should add that the plow was on the front of the truck, not in the bed.
Roy
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Nate;
The problem is lubrication to the OD section
The OD kinda 'sucks hind tit' in that unit..............it gets the leftovers from cooler flow, after the pressure regulator sends fluid to control and clutch pack circuits, plus the cooler flow is HOT fluid, in spite of the cooler
now, your truck SHOULD have a very good cooler alongside the AC condenser on the driver's side, its as good as any aftermarket, plus it is situated for good air-flow, but still, that's a LONG way to tow in OD
but no, I would keep it in 3rd, since then the netire OD gear-set rotates as a locked unit...........the only place I would try OD (and it's your call) would be across IL, IN, IA and eastern SD (or ND if you go that route), as soon as you hit hills or even 'rolling terrain', get back in 3rd
hey, if you're worried about taking extra time, the spare bedroom is available, stop by, we're 120 miles south of I-80 and then you can catch I-72 east to contunue east; or take I-72 to here, then head up to the Quad Cites and I-80 going west
Gary

loaded
me
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On Sun, 12 Jun 2005 14:16:26 GMT, "TranSurgeon"

i appreciate your answer gary. the "to tow in overdrive" question is probably the biggest single debate on tdr (almost like our k&n :) ). at my local dealer, at one in vegas, at one in pahrump, and at two others in big cities out here in the west i spoke to the tranny guy about this. all of them sufggested that i tow with overdrive locked out. they all said the only thing i'd lose is a little mileage that i couldn't hurt the engine. they all felt that overdrive in either the 47re or the 48re won't hold up to towing. they all felt tha the 48re was a significant improvement over the 47re, but not necessarily in the overdrive area. the owner of dtt (tranny specialistics for diesels in washington) also agreed. so, i tow with overdrive locked out. but only due to what i have been told, i am not a tranny tech or mechanically inclined in that area so i rely on the advise of others. i still read a lot of threads on tdr from guys with 47re's and 48re's that have towed big trailers with overdrive on for thousands of miles without any apparent problems at all though, so the debate goes on.

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