Torque converter bc

As the diameter of a torque converter decreases, the stall speed RPM goes up. Most of the factory torque converters are inch diameter and have a stall speed around RPM.

This promotes excellent fuel economy and drive ability because they are specifically designed for these purposes. The problems arise when the modifications are done to the fuel system, camshaft or other engine control systems.

Smaller diameter torque converters are needed to provide more slip at idle. This allows engines with a lot of camshaft to idle better. As the torque converter and horsepower range is moved higher through the RPM range, the smaller torque converters with their higher stall speeds provide maximum torque multiplication where needed.

Also the same torque converter will react differently when used behind different engines. Would torque still flood if converter bad but scavenge pump good even at low idle. I will change out scavenge pump first, but looking for advice.

I am a light truck diesel mechanic and this big equipment is new to me, kind of fun though. Magnet on drain plug had small amounts of filings both times I opened it. There should be a magnetic filter by the trans and steering pump on the RH rear of the engine square plate with 4 nuts on studs pull it out and inspect.

The ring of magnets is inside the outer screen. DPete , Oct 30, Dan It's been a while since I messed with one, as the lask 8K went away about 10 or so years ago, and the 46A about 15 years ago, but it seems like 4 gallons is way too much. I was thinking about a gallon and a half, maybe 2, but I could be wrong.

I always ran the transmission about 5 gallons over the full mark. Running in a lot of steep ground, they had a tendency to loose prime and freewheel once the tractor was too far out of level if it was not that far over.

Most people told me 2 gallons over was fine, but after taking 2 rides down the side of different mountains freewheeling backwards, I would fill it to full or a little past then pour a fresh 5 gallon pail in.

I quit having that problem then. Another thing, when I had a bad pump and a flooded converter one time, it was fine sitting at idle, but whithin a couple of minutes running it would run to the hot end of the gauge and would loose pushing power and lug the engine even with no load after it was worked just a minute or 2.

When I first started doing maintenance on machine it had 2. Trans level stayed good for first 8 hrs. Is scavenge pump on bottom of torque? Does lower plate come off to access? Often they will still work fine but the scavange pump can not keep up with the excess oil.

Often if you want to check this you can pull the scavange pump out at the bottom of the convertor housing, turn the engine over and you may well see the crack. Torque convertor needs to come out if this is the case. Seen this a few times. Cheers 68M. Joined: Sep 19, Messages: 1, Location: Ontario. Thanks, I will try that this weekend.

Location: Perth, Western Australia. Brian - It's not unusual to shear a key on the scavenge pump shaft, in which case they stop pumping. The scavenge pump is easily removed from the bottom, it has a straight-cut gear that just runs on a gear on the outside of the torque divider - and once unbolted, it just drops away from the torque divider.

If the pump is shot, you need to carefully check gear-to-housing clearances, and bearing-to-shaft clearances. These bearings are only cheap white-metal bearings, they nearly always need replacing. The housing oil level must be kept low, otherwise the torque divider starts running in a big bath of oil, creating a huge amount of drag and heat buildup. This happens very quickly mins , once you put the tractor to work.

OzDozer , Oct 31, We rely on customer and dealer satisfaction to measure our success and ultimately maintain the highest standards of our product lines.

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