What size tyres are you running the standard 750's?
The reason I ask is I have an SWB with an overdrive that originally had 205 tyres fitted. When I changed to 7.50's not only did the acceleration slow significantly (and it was not quick to begin with!!) but I had to be going faster before I could engage the overdrive as the engine would not pull the higher gearing. I also now have have to drop out of the overdrive as soon as there is any hint of an uphill slope otherwise it will grind to a halt. None of this is a problem and I am much happier with the larger tyres but it was a significant change and required a change in driving style.
Swapping the diffs would give you roughly a 30% increase in gearing over standard by my calculations, whereas I believe my overdrive (fairy) gives a 20% increase in gear ratio. The difference being yours will be across all gears rather than selectable.
Although I cannot say for sure, I would expect the engine would pull it reluctantly and acceleration would be slow, however you may find you spend a lot more time in 3rd gear where previously you would have been able to use 4th. Similar to my experience of increasing the gearing through tyre size where I now spend more time in 4th rather than overdrive.
Quite happy to be corrected. The diff ratio may not be totally accurate either as they were from a distant memory when I was looking into it.Minor detail but iirc O/D is 27%
I guess I could try one on the back firstI would think it will be over geared...lnock your speedo out by around 25-30%
I fitted them to mine with its 200di engine...and its fine.
Good suggestion...try one in the rear and see how it goes.
Just replace the diff pan with one with a filling plug and the problem is solved.Also it is a pain filling the diff through the breather hole or in the end of the axle.
I prefer 7.50’s to modern metric sizes. But there is less choice. If you want originality I like the deestone extra traction but they are noisy on the road. I run Michelin ZXL’s on mine and have no complaints. They are quieter than the extra traction’s. And handle the road well at series speeds.I suppose and that way all i need to do is get some tyres which I need to anyhow. Any recommendations for tyres? I mainly drive on road and have the old style wheels.
Hows about avon rangemasters?? Them michelins are rather pricey!! Just wondered how bad are the deesontes anyhow??I prefer 7.50’s to modern metric sizes. But there is less choice. If you want originality I like the deestone extra traction but they are noisy on the road. I run Michelin ZXL’s on mine and have no complaints. They are quieter than the extra traction’s. And handle the road well at series speeds.
Hows about avon rangemasters?? Them michelins are rather pricey!! Just wondered how bad are the deesontes anyhow??
The deestones are fine at series speeds but I would not want to fit them to anything quicker. They do rumble along the road. Not as bad as the old super all grips though. They used to howl.Hows about avon rangemasters?? Them michelins are rather pricey!! Just wondered how bad are the deesontes anyhow??
The deestones are fine at series speeds but I would not want to fit them to anything quicker. They do rumble along the road. Not as bad as the old super all grips though. They used to howl.
Although 235/85 are the nearest metric equivalent I think they look very differant when fitted and prefer a proper 7.50. The Michelin’s are very expensive new but co e up second had fairly often. And regularly cone up in the MOD disposal auctions.