Indentifying diffs
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Indentifying diffs
Having finally run out of ideas for where the vibrations are coming from in my van*, I want to change the diff to a 4.22:1 version. Now I have some spare ones, but have no idea what they came out of!
Can anyone tell my the part numbers of the varing diffs please?
Also does anyone know what the speedo number will be to match?
Many Thanks
Andy G
* I've changed engine and box, new engine mounts, steady-bar rubbers (nd not too tight!), checked prop bearings, it can only be the rear axle. The vibrations come at about 55mph and stay from there on upwards, any other ideas??
Can anyone tell my the part numbers of the varing diffs please?
Also does anyone know what the speedo number will be to match?
Many Thanks
Andy G
* I've changed engine and box, new engine mounts, steady-bar rubbers (nd not too tight!), checked prop bearings, it can only be the rear axle. The vibrations come at about 55mph and stay from there on upwards, any other ideas??
Certainly have tried the wheel-balancing front, hasn't seemed to make any difference. The vibration has been there for about ten years, it's just that I'm now using the van as a daily driver, and I'd like to be able to keep up with traffic (hence why the 4.22 diff). Interestingly have looked at one diff and the crown-wheel didn't have a ratio maked on it, just the part number.
It has in the past been so bad that the screen has shattered. I just wish I could get to the bottom of it!!
Andy G
It has in the past been so bad that the screen has shattered. I just wish I could get to the bottom of it!!
Andy G
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- Minor Legend
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Identifying diffs
I had exactly the same problem. Prop balancing is quite expensive. BM sell propshafts secondhand at a reasonable price. They even posted it to me in Germany for 15GBP! Couldn't complain about that and it solved the problem. Check the UJ's and regrease before installing.
Declan
Declan
Regards
Declan
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- Series MM Registrar
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Prop shaft sounds favourite to me. I had the problem on my Series MM so I didn't have a spare. I had the shaft overhauled with new ends and rebalanced and it has been perfect since. I can't remember it being too expensive but it was well worth the effort.
Wheel balance shows up through the steering wheel, prop shaft just vibrates the whole car.
Wheel balance shows up through the steering wheel, prop shaft just vibrates the whole car.
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One other thing that can cause strange vibrations is if the gearbox steady cable is done up too tight instead of the slack just taken out of it, but as this has been going on for a long time it does rather sound like the prop, you could try a couple of large jubilee clips on it to see if it alters the vibration range.
Cheers
Kevin
Lovejoy 1968 Smoke Grey Traveller (gone to a new home after13 years)
Herts Branch Member
Moderator MMOC 44706
Kevin
Lovejoy 1968 Smoke Grey Traveller (gone to a new home after13 years)
Herts Branch Member
Moderator MMOC 44706
Thanks for all the thoughts, I played about in the rain on Monday, and swapped the prop for the nice clean one which I had painted up for my GPO van, and what do you know? Yeap thats right the vibration has gone. Well almost, theres a singey bit as you hit 62-65mph but so much better than before! Infact I can now chug around at 30 mph in top which it just wouldn't do before!
The old prop will have to be balanced up (if I can find somewhere that will do it!) before I use it on the GPO van.
I haven't changed the diff yet, but now I know i'm looking for a 9/38 l'll have a hunt through the box, and my next free long weekend I'll try and swap it over, so that I can save a few more pennies!
Thanks again all
Andy G
The old prop will have to be balanced up (if I can find somewhere that will do it!) before I use it on the GPO van.
I haven't changed the diff yet, but now I know i'm looking for a 9/38 l'll have a hunt through the box, and my next free long weekend I'll try and swap it over, so that I can save a few more pennies!
Thanks again all
Andy G