![1958 triumph tr3a engine oil 1958 triumph tr3a engine oil](https://i.ebayimg.com/thumbs/images/g/-lYAAOSwgYBg-mmY/s-l300.jpg)
All this time I used 30 weight engine oil as the lubricant for the gearbox/overdrive.ĭuring the early 1960s, multigrade oils became available, such as 10W30.
![1958 triumph tr3a engine oil 1958 triumph tr3a engine oil](https://photos.classiccars.com/cc-temp/listing/138/8434/22889113-1958-triumph-tr3a-thumb.jpg)
Before I put the car away in 1972 with 80000 miles on it, the first gear and bearings in the gearbox were damaged again. The same problems occurred again at 42000 miles. I was a student in university at the time paying my own car expenses and college fees, so I had to be very careful.
#1958 triumph tr3a engine oil full
After getting it repaired, I was extra careful never to take it up above 3000 rpm in first gear and I made sure that I was at a full stop before engaging first gear. Perhaps I was too rough or too young, but I felt it didn't last very long. The gearbox in my car does not have a synchromesh first gear and at 14,000 miles (22400 kms) I had to have the lower lay shaft with its straight cut spur gear teeth plus all the bearings changed. At that time this was the recommendation. I always changed the oil in the gearbox/overdrive with straight 30 grade engine oil. It is a tech article I did a number of years ago, but I have just up-dated it here. Here is the story of my experience on this subject. WHICH OIL TO USE IN A TR GEARBOX WITH OVERDRIVE I was told by the individual who rebuilt my transmission - who does this sort of thing fore a living - to use only 30W non-detergent oil. Only concern with going to 90 weight Hypoid gear oil is damaging OD. The output flange hub body does have a slight groove where the seal runs, but before I go and replace it, wondered if the 50 weight motor oil is adding to the leaks as well. After that the leak is from the selector shaft seals. The major leak is from the output shaft seal. The underside is well rust proofed! The gearbox has been rebuilt with all new bearings and seals. The problem is the transmission leaks excessively, to the point that people following get a drop or two with a good bump.
#1958 triumph tr3a engine oil drivers
The bently reprint shows 50 weight motor oil, the drivers manual shows 90 weight hypoid gear oil (GL-4) and the restoration shop suggests 50 weight motor oil. I'm working with the Bently reprint of the Workshop Manual, a reprint of the drivers manual and advice from a restoration shop. The question is what type and viscosity oil are you using in your gearbox? The car is a '59 TR3A W/ Overdrive. I've searched the archives, but to no avail. Triumph TR3 - Gearbox Oil This may seem like a silly question, but since I have conflicting information I'll ask the opinion of the forum.