ClassicIDI
Member
ok this is a long drawn out saga of mine but im really looking for what you guys are seeing when towing.
I have 3 trucks
#1 early 99 swamps reman AD injectors, adrenaline, s364 billet wheel (Aurora 4k) out of the box php hydra tuning, 4:30 gears, 35" tires, built auto trans with 6.0 cooler, ATS intercooler 350K on the truck
#2 Early 99 stock auto trans with 6.0 cooler. bone stock except for exhaust and superchips tow tune, 3.73 gears 32" tires and that's it 164K (dad bought new)
#3 Early 99 ZF6 bone stock except for 4" exhaust. no tunes 3.73 gears 32" tires 210K
My trailer is 40ft enclosed triple axle that I put two crawlers in and tow all over the country. I'm in denver and tow the mountains alot trailer weights 22K loaded so with truck im pushing 30k Its heavy.......
I have been towing this trailer with truck #1 for 4 years and its been a challenge. always fighting oil and coolant temps egt's are never an issue. but pulling passes I will see 230-240 coolant and 245-255 oil temps and much higher if i push the truck hard. EGT's normally not an issue unless I mash the pedal then they will climb.
Last year I was on a trip and lost the #7 cylinder in kansas city (truck #1). On a whim I bought truck #3 and proceed on my way. This truck is an entirely different truck, cant get it hot even If I try. oil temps are maxed at 230 no matter what. Coolant temps 220 no matter what. egts laugh at 1200 degrees. and truck tows the trailer just as fast if not faster then then the old one.
I thought it was because of the non stock parts on #1 so yesterday I hook this same trailer to Truck #2 and proceed into the mountains. Oil and coolant temps hot. 257 oil temp, gauge on dash starts to climb so 235 coolant, egts ok at 1000-1100 but im in 1st doing 20mph. truck is struggling. pull the first hill turn around and go home hook up truck #3 so same hill same trailer same day. this pull is 5-7% grade and 10 miles long
Truck sees oil temp 234, half way up I down shift to second and temps start to cool off to 230.. dash gauge never moves and im doing 15-20mph faster then #2. egts 900-1000.
Is this all because of the zf6? This is the only zf6 truck Ive had This truck has some rust and I hate rust but otherwise its a fantastic truck. My plan was to keep #2 and put a BTS in it but now IDK. Im trying to figure out if its worth converting #2 to a zf6. #2 is a cream puff garaged perfect condition truck my dad bought new but struggles to pull this trailer.
Is truck #3 a normal zf6 truck or some kind of unicorn that if i sell i'll regret forever? How can just a zf6 make the truck run so much cooler and faster?
If i convert #2 to a zf can I expect the same performance from it?
truck #1 and #2 tow very similar temp and speed wise.
those of you with zf6 trucks what temps do you see towing heavy?
thanks for hanging in there with me
I have 3 trucks
#1 early 99 swamps reman AD injectors, adrenaline, s364 billet wheel (Aurora 4k) out of the box php hydra tuning, 4:30 gears, 35" tires, built auto trans with 6.0 cooler, ATS intercooler 350K on the truck
#2 Early 99 stock auto trans with 6.0 cooler. bone stock except for exhaust and superchips tow tune, 3.73 gears 32" tires and that's it 164K (dad bought new)
#3 Early 99 ZF6 bone stock except for 4" exhaust. no tunes 3.73 gears 32" tires 210K
My trailer is 40ft enclosed triple axle that I put two crawlers in and tow all over the country. I'm in denver and tow the mountains alot trailer weights 22K loaded so with truck im pushing 30k Its heavy.......
I have been towing this trailer with truck #1 for 4 years and its been a challenge. always fighting oil and coolant temps egt's are never an issue. but pulling passes I will see 230-240 coolant and 245-255 oil temps and much higher if i push the truck hard. EGT's normally not an issue unless I mash the pedal then they will climb.
Last year I was on a trip and lost the #7 cylinder in kansas city (truck #1). On a whim I bought truck #3 and proceed on my way. This truck is an entirely different truck, cant get it hot even If I try. oil temps are maxed at 230 no matter what. Coolant temps 220 no matter what. egts laugh at 1200 degrees. and truck tows the trailer just as fast if not faster then then the old one.
I thought it was because of the non stock parts on #1 so yesterday I hook this same trailer to Truck #2 and proceed into the mountains. Oil and coolant temps hot. 257 oil temp, gauge on dash starts to climb so 235 coolant, egts ok at 1000-1100 but im in 1st doing 20mph. truck is struggling. pull the first hill turn around and go home hook up truck #3 so same hill same trailer same day. this pull is 5-7% grade and 10 miles long
Truck sees oil temp 234, half way up I down shift to second and temps start to cool off to 230.. dash gauge never moves and im doing 15-20mph faster then #2. egts 900-1000.
Is this all because of the zf6? This is the only zf6 truck Ive had This truck has some rust and I hate rust but otherwise its a fantastic truck. My plan was to keep #2 and put a BTS in it but now IDK. Im trying to figure out if its worth converting #2 to a zf6. #2 is a cream puff garaged perfect condition truck my dad bought new but struggles to pull this trailer.
Is truck #3 a normal zf6 truck or some kind of unicorn that if i sell i'll regret forever? How can just a zf6 make the truck run so much cooler and faster?
If i convert #2 to a zf can I expect the same performance from it?
truck #1 and #2 tow very similar temp and speed wise.
those of you with zf6 trucks what temps do you see towing heavy?
thanks for hanging in there with me