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Old 01-09-2007, 06:05 PM   #15
Rivet Master
1992 34' Limited
Falls Church , Virginia
Join Date: Mar 2005
Posts: 945
Torque converter is ON when...?

Condo et al -

Sorry for the dumb question, or is "that" simply the one that isn't asked...?

Have an 01 2500 HD Burb that gets to pull my 34' SilverToy.... Often spend a lot of time looking at the tranny gauge temps, which due to the terrain, is often ping ponging all over...

Situation is when I pull to the hacienda, 12degree(x2) and 14(x1) degree upgrade with about 1 mile of various other grades in between.... This always pegs the gauge at about 200 degrees. Keep the TV in idle for at least 10 minutes when it is in the drive, to cool things off and ?? Is this in line with your SOP's??? Input?

So the question is about the easier grades. Sometimes (highway speeds) using the normal throttle inputs, the tranny will downshift.... That is OK. Just wondering about the gradual upshifts again... Noticed that the tranny will go from 2800/3000K to about 2500/2600 then to about 2250/2300....

Is this the 'normal' sequence... 3rd to high, then OD?

I confess, I DO tow at speed with OD on - ie Tow/Haul not ON, on the more normal sections and speeds. Will switch it ON on EXP. Entry, hilly sections, Stop & Go situations.... Other thoughts here??

Now that I re-read my post, what I wrote makes sense, but then there are NO STUPID QUESTIONS... right??

BTW - noticed that the temp gauge indates about 300/400 increase degree temps with 65mph with the trans in 3 vs. D (NO T/W engaged). Is this in line with others experience?? Temps being the enemy, is this OK over the long term - 400 degrees over umpteen miles? Thoughts here?

Thanks again!



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Old 01-09-2007, 06:38 PM   #16
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1976 25' Caravanner
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Campton , New Hampshire
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So the question is about the easier grades. Sometimes (highway speeds) using the normal throttle inputs, the tranny will downshift.... That is OK. Just wondering about the gradual upshifts again... Noticed that the tranny will go from 2800/3000K to about 2500/2600 then to about 2250/2300....



I must confess I could not follow all of that post , let me try this part.

First thing is terminology , those readings you're giving are not the transmission , they're the tachometer ,which is engine speed ( RPM ) .

At 3000 RPM you are in 3rd gear , when it shifts up to 4th it's at 2600 RPM , it is still slipping at this point . It drops down to 2300 RPM when the torque converter locks up , no more slipping , that's what you want . Hpoe that makes sense .

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Old 01-09-2007, 09:43 PM   #17
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Please don't hijack my thread here. The subject is towing smaller trailers with 1/2 ton trucks, not 31 footers with 3/4 ton trucks. If the info applies to towing smaller/smaller combinations, please go on. Thanks.
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Old 01-09-2007, 11:49 PM   #18
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2005 25' International CCD
1960 18' "Footer"
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Riverside , California
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Our first Airstream really hit the Smaller Truck/Smaller Trailer Combinations. We towed a 2005 22 ft CCD with our 1996 Jeep Cherokee, 6 cylinder with 5000# factory towing package for the first six months we had the Airstream. We used the Equlaizer hitch and experienced no stability issues with head winds, side winds or bow waves off passing 18 wheelers. I should note that I did have to re-adjust the hitch after driving home the first night from the dealer. They had the ball too high and not enough preload on the weight distribution bars. The Jeep settled in the back while the front came up an inch or so!. After proper adjustment the back settled about 1 1/2 inches, the front 1 inch.

We noticed the lack of power on the steep grades out of the Los Angeles basin on I-15 and I-10 freeways. Both have long upgrades that exceed 20 miles and several thousand feet. We could easily maintain 55 mph but were turning 4000 RPM in second gear. Water temperature stayed about 210 on those steep grades. What would cause a problem was when passing truck traffic would slow everyone down; it was difficult to build speed back up without pulling out in the fast lane and slowing other traffic. We did not have any trouble maintaining the speed limit going into Death Valley from Baker but Jubliee Pass was quite steep and twisty so the 20 MPH speed limit was welcome in our Jeep. That said our neighbors couldn't go more than 20 MPH in their 8.0 liter SOB motorhome either.

The Jeep did very well on our maiden trip to Joshua Tree. We drove about 50 miles in 4 to 6 inches of snow in 4 wheel drive with the Airstream in tow the day we left! We never did tow with this combination in the summer heat having bought a larger tow vehicle in the Spring.

in retrospect, towing the CCD with the Cherokee was very similar to towing travel trailers back in the 60's and 70's; you had to slow down on long steep grades because you didn't have a choice.
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Old 01-10-2007, 06:23 AM   #19
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The Right Combination

Randy, Sounds like you had a great experience towing to the Can Opener Rally. I have installed the Equalizer weight distributing hitches on many towing applications and have found it to be a good product.
I have towed many trailers over the years with 1/2 ton rated trucks. The largest I towed was a 25 foot model. I used a Reese Dual Cam W/D hitch. I have also towed a 1965 Safari 22 with a Jeep Grande Cherokee V-8 with very good results. Hope to meet you in your travels this summer!
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Old 01-10-2007, 06:38 PM   #20
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Back to your follow-up question, you have indeed arrived at a workable routine.. Cruise is OK unless it appears to be struggling to maintain speed uphill, in which case the accelerator will go to floor and you can hear the engine straining. Likewise, if the transmission is just not able to stay in one gear for long, and seems like it is "considering" downshifting all the time, lock out overdrive or downshift to lower gear until you're no longer pulling up the hill.

Having a transmission temp gage is nice, as you can see what is happening directly and shift (or park and rest) to maintain manageaable fluid temps.

Glad the Rally was a success!


In Theory, there's no difference between Theory and Practice, but in Practice, there is usually a difference...
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