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Hewland Engineering Ltd is frequently asked to recommend oil type or oil brand for it's transmissions. It may be that in the future Hewland will have specific product advice, but this is not the case at present.We recommend that only well known brand name gear oils be used. A leading oil company advises us that conventional oils contain 'too many' additives for the utmost transmission efficiency, but will almost always lubricate well. Therefore, conventional gearbox oil from one of the leading brand names is almost certain to lubricate very well indeed. It may be at the cost of inefficiencies however. Therefore we do not recommend the use of specific racing oils initially, although a test program may prove these to be advantageous.However, we offer the following advise:Fit a temperature sensor from your data acquisition system into either the gearbox sump area, or into the oil pipeline on a pumped oil system. Monitor the oil temperature and note the pattern of temperature increase and the top temperature achieved. NB it usually takes at least 15 minutes of running to reach a level maximum temperature. The ambient temperature and the loads through the gearbox will affect temperature, i.e. a cold wet day will produce cooler gearbox temperatures.There are two reasons for logging oil temperature:1. An above normal temperature indicates a gearbox fault (Bearing or tooth failure etc.). This can detect a big failure before it is catastrophic.2. When you have established a pattern of gearbox temperature for your vehicle, you can then try different oil quantities and then different oil types. As a broad guide, the oil quantity and type that runs the coolest is the most efficient at lubricating and minimising power loss
Redline says specifically to NOT use any coolers or pumps with it. I had to read that twice. LOL!
Maybe, just maybe it is not the best choice? Is it shock that is the issue? If so, run it. Or is it temperature? My guess is it was not designed for prolonged use? Let me rephrase that. An extended duty cycle. An off road car, possibly running 24 hours would be an extended duty cycle. A top fuel? Short duty cycle. Most race cars would have relatively short duty cycle. So, lets stick with cars with big power and long duty cycles. LMP comes to mind. Fortin? Hardly. Hewland is the big dog. They don't recommend oil. Likely conflicts with big money contracts. Want to know their secret? Just food for thought.
Odd. I know of other cars that have used coolers with it without issue. They were torn down after around 1500 miles so maybe they never had time to sludge up.Always had to set the bottles out in the sun for a couple hours before filling to make them pour well.Shifting will be a little stiff till you get it warm.
Yup,food for thought. I have time to chew on it before I fill it back up.