Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Bevel box rebuild

Well done! I'm disappointed that Quaife, with all their experience in producing performance orientated transmission products, cannot build a relatively simple bevel box that's both quiet and long-lasting. Gerry.

Hi,
Have you decided why the bevel box bearings needed replacing?What was the cause of the failure?Was it badly assembled in the first place?Did the black goo that MMC in there wisdom used to "lubricate" the box from new cause the issue?
Or is it simply that the belt drive puts too much lateral stress on the output shaft bearing.?Im sorry if im posing a load of questions but I am sure my BB will fail at some time and your opinion and experience will be welcomed by all.

Regards David

As others have said impressive stuff! Finger's crossed.

I wonder if they were working under unreasonable cost pressure from MMC, and built down to meet the specified price? Certainly their other products are excellent if my torque-biasing diff is anything to go by.

I suspect that this is absolutely the case. Quaife are proud of their engineering and their products are very well respected in all forms of motorsport, so I suspect that they are trying to distance themselves from the 'issues' over the M3W BB. This would explain their 100% consistent message that they will not deal with customers and always refer folk back to the MMC. Suspect that was always (and remains) part of the supply deal.

At £33k however, you'd not expect that the MMC needed to be too worried about an extra £500 or so to get the BB engineered to their same high standards though would you?!

Very impressive work ...well done and thanks so much for sharing.

The BB issues exposed!!

Quaife have a proven track record for supplying built proof products.

This is only a guess: but maybe Morgan specified a lower specification (ie. Lower cost) bevel box than that advised by Quaife. This could explain their reluctance to get involved directly with customers.

Quaife is a very well respected company as Deano suggests, makes you wonde why Morgan havent done a recall on some of the serious issues found on the three wheelers.

Em

The cause of the failure was lack of pinion bearing preload. My bevel box had a gear wine since I purchased the car then on a 65 mile trip the car began to vibrate mostly on deceleration. The box temp was 168 degrees with the pinion housing at almost 250! after removing the pinion housing and the oil seal cover I measured preload at .5 inch pounds. Only the upper and lower parts of the rollers were contacting the race and they were scored from vibration. After rebuild and a 35 mile test run the box is holding a 156 degree temp, still seems high for an aluminum box but I really don't have anything to compare it too.

Not impressed with Quaife or Morgan for that matter. Both companies don't stand behind what they make. 4500 miles and the part fails? Finding out they would not warranty the box was a shock. Kia stands behind what they build better than Morgan does. I am not a check book guy, wish I was some times, and I did not have the $3000.00 they wanted for a new box. All I wanted from both companies was a source for the pinion shims, crush sleeve and preload and torque specs and they would not even supply that. Disgraceful is the best word that comes to mind. I was a good ambassador for Morgan here in the Mid West, but no longer, I would not recommend a Morgan to anyone who has no ability to fix things themselves.