what kinds of load weights?
I've hauled a 10,000lb scaffold trailer with no pump mods or anything just fine for work all the time till I switched companies. Stopping with that much weight behind you is a different store though it can get scary in heavy traffic.
Ive hauled 3 to 3.5 tons of chat on the back of my truck several times, power wise i couldnt feel it back ther. Only problem i had one time was the brake master cylinder failing with around 7000lbs in the bed
, that was a fun ride lol.
, that was a fun ride lol.
A Buddy of mine used to pull 16000 with a 1 tonne dually 4x4 maybe more Big Finning Skid steer and all his gear on a Goose neck . The motor was a industrial with a stock VE and it was an auto . lol He drove it like it was stolen. dang thing was sold and is still running.
Never had it on a scale, but before i did much to my W250 auto i pulled 14,500 lbs worth of tractors + the weight of the trailer (25 ft gooseneck) it pulled fine but i live on some pretty flat ground to.
Dar
Dar
So, the real answer to your question, Realest, is, 'Probably a lot more than they should.'!
Before I got my hands on it, my wife used to pull upwards of 20k in horses and horse trailer all over the lower 48. The only problem she ever had was burning the headlight switch out somewhere in Mississippi at 4am. 
Before I got my hands on it, my wife used to pull upwards of 20k in horses and horse trailer all over the lower 48. The only problem she ever had was burning the headlight switch out somewhere in Mississippi at 4am. 
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Pulled about 10k trailer+truck on trailer with a large wind drag area yesterday on a stock tranny with the line pressure boosted up and the Derale Deep tranny pan with cooler fins. The engine is quite modified, but that certainly was not the weak point. I was blowing through my torque converter in the big hills in Northern Maine and running 2600-2900rpm the whole time in 3rd gear at about 50-60mph for 4 hours. I had ALL KINDS of pedal and power left in the engine, it just wasn't making it to the wheels. I was misinformed about what tranny temps should be (installed the gauge the night before), so I was backing off when I got to 180*F or so when really I was safe into the low 200*F range. Probably could have used O/D on some of the flats and down hills without issue now I'm reading other posts about what temps should be.
A big help to keeping it cool was the 10*F weather though!
A big help to keeping it cool was the 10*F weather though!






Fair old load too. Bet it was easier after the swap.