I need to know what my stock 93 extended cab 2500 w/ auto OD is rated for towing purposes, thinking about finding a used fifth wheel,and don't have the original owners manual.

 

i looked it up on the net it shows 11,900 here is the link had a lot of good info on it hope this helps
jman

http://auto.consumerguide.com/auto/u...ex.cfm/id/2141

 

Look out - that's CGWR - includes the truck, people, and everything.

One way to raise it is to put a superduty transmission cooler into it. The A518 auto is one hell of a heat generator. Adding the cooler under the bed with fan adds 2,000 lbs (12,000 to 14,000 for the D250).

DBF

 

It depends on the axle ratio. If I recall correctly, my 93 D250 with 3.55 is 12,000. With the 4.11 ratio it is 14,000. The extra cooler adds 2,000 to each. Last I checked, there were no DC authentic under cab coolers left to buy in the USA.

The one I'm thinking of installing is fan powered cooler mounts under the cab, available from JC Witney for about $140.

John

 

John H, you're absolutely right. It does depend on axle ratio.

I got one of the last ten real Superduty coolers. On the front page of the instructions, it gives the additional 2000 pounds GVWR information.

The only caution I can think of is that the substitute cooler you install should have pipe size equal to, or greater than, the pipe size in the truck. If the cooler uses 1/2" pipe versus the (I think) 5/8" in the rest of the system, it will be a flow choke point.

Regards, DBF

 

DBF, I had thought briefly about the pipe diameters, but I haven't yet checked to see what mine are, and what the JC Whitney one has. I will certainly do that before I commit to one.

How did you plumb your superduty cooler in? In what order did you run the piping from the transmission outlet to the various coolers? From the transmission to the engine cooler, the infront of the radiator cooler and finally the super duty cooler?

Also are you using the thermo controlled switch for the fan, or are you turning it on manually.

John

 

Hmm... hadn't thought about it in a while.

I'll get under it tomorrow to confirm, but I believe it goes trans-output to cooler-above-radiator then to the cross-over pipes under the rear of the engine.

That's where the pipes are cut and the superduty cooler plumbed in via long hoses to the underbed mount. So it continues then to the engine-coolant to trans-fluid heat exchanger on the passenger side of the engine, then back to the transmission. Folks have told me the reason for this is that the engine (thermostat-regulated to 170*) coolant temp is what the trans likes.

My fan comes on at too high a temp (300?), so I rigged a switch on the gage panel to turn it on when I want (usually when I'm facing a long hill).


DBF

 

300* holly poop, that is frying EVERYTHING!

 

According to the owners manual it's 12,000 w/o the extra cooler, 14,000 with the cooler for a 3.55 rear. My truck is stock which is why when I replaced the tires, I went with 245-75-16. They're slightly undersized and give the equivalent of a 3.70 ratio.