Burning trans smell - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

 
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post #1 of 10 (permalink) Old 11-10-2019, 11:55 AM Thread Starter
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Burning trans smell

Hi all, last night I pulled my fishing boat to the lake, Iím guessing about 3000 lbs, and when I got there there was a strong smell of burning trans fluid. No leaks and fluid is full and clean looking. Also, It doesnít smell bad when I pull the dipstick.. it seems to shift fine. Any thoughts? Itís a 2000 f350 automatic
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post #2 of 10 (permalink) Old 11-10-2019, 12:41 PM
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It could be a leak from a trans cooler line. I would differently look there. It may be spitting on the exhaust somewhere maybe why you don't see a leak.
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post #3 of 10 (permalink) Old 11-10-2019, 01:28 PM Thread Starter
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Thanks, I took a good look this morning and couldnít find any leaks anywhere. At second look the fluid level looks about a quart low and has a faint burnt smell but nothing like the smell that I had last night. I wish I had a trans temp gauge. Thereís a good trans shop by my work I think Iím going to have them check it out
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post #4 of 10 (permalink) Old 11-10-2019, 07:10 PM
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Do you have the oil to water cooler in the bottom of the radiator? If not, you should convert to a newer radiator and plumb that in. If you're relying on the little undersized oil to air cooler by itself, it may not be enough - especially if it's full of debris. A transmission temperature gauge is almost a requirement if you tow. With my upgraded cooler and stock oil to water cooler, I stay below 180į towing 10K plus in our triple-digit temps with no problem.

2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM, Full Force Stage 1 injectors

IF MY BODY IS EVER FOUND ON A JOGGING TRAIL JUST KNOW THAT I WAS MURDERED SOMEWHERE ELSE AND DUMPED THERE
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post #5 of 10 (permalink) Old 11-10-2019, 07:37 PM Thread Starter
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I hear ya RT. This is a fairly new to me truck. My last truck was also a 7.3 which I ran for 450,000 and I never had an issue like this but I donít tow a lot. I think Iíll have it checked out and hopefully itís not on itís last leg. Havnt done one but Iíve read the 6.0 cooler is the way to go
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post #6 of 10 (permalink) Old 11-10-2019, 08:01 PM
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The ScanGuage-2 has TFT as just one of its many parameters.


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Stancor GPR. Walker BTM. Noco Mod. Michelin Defender LTX 285/75/16.

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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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post #7 of 10 (permalink) Old 11-12-2019, 12:42 AM
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Install the 6.0L transmission cooler.

https://www.rockauto.com/en/catalog/...,radiator,2172

Install a transmission temperature sender and gauge.




Monitor the transmission fluid temperature when towing and slow down or stop if it is getting too hot.

2001 F350 XLT 4X4 crew cab, dual rear wheels, long bed, black, 7.3l turbo diesel, automatic transmission, 4.10, shift on the fly, running boards, sliding rear window, 38 gal fuel tank, Odyssey extreme 65-PC1750T batteries, Michelin LTX-MS2 rear tires, Sumitomo Encounter front tires, Shell Rotella Ultra elc, 11,500 gvwr, 20,000 gcwr, 7500 gvw, completely stock, 114,000 miles when purchased, now has 250,000 miles, repairs so far: two starters, batteries, cps, brakes, tires, alternator, ball joints, locking hub, wheel hub, AC compressor, serpentine belt, power steering pump, driver's side window, ignition switch, o-ring, Spectra premium radiator, water pump, fan clutch, fan blades, thermostat, thermostat housing, tensioner. Stolen twice so far, but recovered both times with major damage.

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post #8 of 10 (permalink) Old 11-15-2019, 01:46 PM
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Couple of years ago I experienced the same thing along with some high tranny temps (I do have a gauge). Cooler was almost plugged and I did not have the cooler built into the radiator even though with my truck's build date it should have had it.

I changed the radiator to one with a heat exchanger AND installed the 6.0 tranny cooler. Now my temps hardly ever get over 160-170 even in our 100 degree summers.

Definitely get a temp gauge!
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post #9 of 10 (permalink) Old 11-15-2019, 02:03 PM
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On a tranny care note. If you have 4x4 use 4x4 low (unlock hubs if possible) when backing a heavy trailer or boat. It is a lot easier on the tranny and you go a lot slower so you look like a pro.
DENNY

Early 1999 F350 AUTO 4x4 CC LB DRW 4.10 6.0 trans cooler, Front hitch, 2,000 hubs/ brakes, Bilstein shocks/steering stabilizer, Diesel site coolant filter 203 thermostat, EBV delete, new O-rings, new Oil cooler, RIFF RAFF FRX, Glow plug led, Pillar gauges, Lighted cupholder, Painless wiring fuze block, Harpoon/hutch mods, Removed axle blocks. Air bags, 5 wheel hitch, In bed 7 pin plug. Spare tire key delete. KLHANSEN on speed dial. 75,000 as of May 2019
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post #10 of 10 (permalink) Old 11-18-2019, 12:32 PM Thread Starter
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So I ordered the 6.0 cooler,itís in its way. My buddy at the trans shop gave it a clean bill of health. While messing around with some other stuff I noticed the inside of the rear tire was all wet..brake fluid. Embarrassing enough I think I mistook the smell of burning brake fluid for trans oil lol.. either way it got me moving on the 6.0 cooler faster than planned
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