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Old 18-07-18, 10:26
David Herbert David Herbert is offline
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Join Date: Mar 2010
Location: Ayrshire, Scotland - previously Suffolk
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Is that engine burning oil ? If so it is possible that the oil is fueling it to keep it going but not enough to over speed it. Look for valve guides, rings and particularly supercharger oil seals.

Synchronising two good engines is possible and when right you cannot really tell that they are two seperate engines. Also the clutch plates last longer as they are not trying to lock two engines together that are doing different things. You just need to follow the instructions in the manual to the letter.

Also check that when you push the clutch down both clutches do fully disengage. One of the joys of M4A2s is that the clutch linkage on the floor gets stuck if the tank gets wet and is not driven frequently.

As Adrian said, change up at the minimum revs that you can but still get the next gear. You will get a much quicker change and the engine has bags of torque so can accelerate from about 1000rpm happily. This is very opposite to a modern car so seems wrong but it is much easier. Running up to maximum revs is fine in heavy going but trying to shift at those revs will result in so much speed loss that you find yourself stopping and starting from scratch. Actually this applies to any WW2 armoured vehicle with a manual shift.

David
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