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Scrub · 11-23-2003, 04:28 AM

I just redid my lines off of a t400. I used the good quality transmission cooler grade rubber hose. I think it cost me 48 bucks. One thing that I thought was significant. The Truck has a 6.2 diesel and had both an "IN Radiator" cooler and an external cooler. The External cooler was disconnected so all the cooling came from the 'In radiator" cooler. The dang thing was overheating the engine all the time on hills, even when empty. Of course it weighs 7500 pounds empty.
Point is, when I redid the trany cooler lines I only used the external cooler and abandoned the radiator one. My overheating problem disappeared and the tranny, which has a temp guage, stays much cooler. I thought the problem was my fan clutch but it might be that the radiator wasn't heating the air enough to make the fan clutch kick in.

Anyway, I recommend the rubber hose. That is what I replaced and it held up in Phoenix before I bought it. I also recomend an external cooler rather than the radiator type.

Hope this babble helps

11-23-2003, 04:28 AM	#9
Scrub Collector of rusty Items Join Date: Dec 2001 Location: Sisters,Oregon USA Posts: 731	I just redid my lines off of a t400. I used the good quality transmission cooler grade rubber hose. I think it cost me 48 bucks. One thing that I thought was significant. The Truck has a 6.2 diesel and had both an "IN Radiator" cooler and an external cooler. The External cooler was disconnected so all the cooling came from the 'In radiator" cooler. The dang thing was overheating the engine all the time on hills, even when empty. Of course it weighs 7500 pounds empty. Point is, when I redid the trany cooler lines I only used the external cooler and abandoned the radiator one. My overheating problem disappeared and the tranny, which has a temp guage, stays much cooler. I thought the problem was my fan clutch but it might be that the radiator wasn't heating the air enough to make the fan clutch kick in. Anyway, I recommend the rubber hose. That is what I replaced and it held up in Phoenix before I bought it. I also recomend an external cooler rather than the radiator type. Hope this babble helps __________________ Scrub Sisters, Oregon - Home of the Sisters Rodeo. 70 GMC 1,000,000 + miles 72 K-20 project, 456 Dana60 front, Corp14 rear w/locker, 265R19.5 tires 20-ply. Warn 12k winches both ends, Cross-over steering with raised tie-rod, Powerbox steering, 4500 watt 120-AC power, Air, Hydraulic aux power, 4 inch lift, 5000 lb air-bags both ends.