Flying Landy but gearbox is vibrating

Hi All

Been away for a while as I have been concentrating on getting my S1 ruster over to Germany so I can start the marathon resto.

The 2a however, is pulling like a tain with the new rebuild 2.25 Petrol. However, recently the gearbox has started to vibrat under power - like something is out of ballance. Its most noticable in 2nd and 3rd and has to be underload. Once in top the whole Landy runs smooth and er......... pretty fast!

I am thinking/hoping the prop is out of balance. Its only about 4 years old but it did come in a blue box with Brit in the title so it could be made from an old toilet roll holder.

As the new motor has more power, could it be doing something to the box?

Any thoughts would be very welcome.

Sad to say propshaft would be speed not gear related - you'd get a shaking at over X speed, possibly more under load. if she runs like a train in 4 but not in 2/3 i'd suspect you have an issue with either a loose or defective front or rear layshaft bearing.

ajr

I was suspecting that - it chewed up a cheap bearing about 3 years ago - input shaft. I replaced the lot with FAG, SKF etc.. bearings but I am fearing the worst.

Thanks for the reply

before getting carried away have a good look at the engine and gearbox mounts, I had all sorts of odd vibrations and judders.

I thought I would provide some feedback.
Pulled the rear prop off at the weekend to check for play in the output shaft - all Ok there. It should be as I have only just rebuilt the gearbox. The thought then crossed my mind that I might have damaged the input shaft bearing when getting aggressive with the engine when I last put that back in.
Then I took the motor for a test drive on the front axle just to make sure and it ran very smooth.
so I checked the rear prop.
Surprise surprise one of the UJs was totalled. Slopping about like a sausage up the M1. I have been under there regularly with a grease gun so I could only put it down to the blue box gremlins again.
I dug out a muddy, cruddy, rusty spare prop from my stash - bunged that on and the drive is now smooth and vibration free.
So there you have it. Yet again - toilet quality parts.

I think I'll leave my 60 year old rusty prop on there rather than risk new hardy splicers made from twigs.

GKN all the way buddy!

GKN, Timken...anything real. I have reached the point where if I do not know the company name on the box then it does NOT go in my Rover. Precision 344s for Series Is and IIs/early IIA (to I believe 1963) - Precision 369s after that. Timken uses the same numbers.