Cornishbloke Posted June 9, 2014 Share Posted June 9, 2014 Hi I put the RB44 in for its VOSA test and for the brake test the examiner used a Tapley meter as the vehicle is permanent 4 wheel drive. It failed on non brake issues, but by the time I obtained the parts and had them fitted it needed a new test. I was not present at the second test by a different examiner who claims to have been able to test the vehicle on the rolling road by putting it into two wheel drive and neutral. I spoke to the test centre who said that he jacked one wheel off the ground and was able to turn it, showing that the front wheels were not connected and that it was in two wheel drive. I am worried that he may have damaged the transfer box by doing this. My understanding is that the gearbox drives the input shaft which is linked by two drive belts to the output shaft which in turn drives the front and rear propshafts. It should not be possible to rotate the front wheels whilst the rear are stationary and vice versa. Have I got this right, and what tests can I perform to make sure that the drive train is as it should be and there is no damage? Cheers Richard Quote Link to comment Share on other sites More sharing options...
g0ozs Posted June 9, 2014 Share Posted June 9, 2014 Richard MoT testers certainly used a rolling road for my first SUMB which was registered so as to require a class VII M0T but that had a selectable 2/4 wheel drive system and was always in 2WD for the test. I can't see how a constant 4x4 vehicle can be tested that way and any independent movement of front and back wheels must be due to slack in the drive train or the action of a differential ? I think the question I would ask is how far he was able to turn the jacked up wheel. I'm not an expert on RB44 but reading your account I share your concern ! Regards & good luck Iain Quote Link to comment Share on other sites More sharing options...
andyroo Posted June 9, 2014 Share Posted June 9, 2014 Richard, Your RB44 is selectable between 2 and 4 wheel drive. In 2 wheel drive its quite safe on a rolling road. Mine has had 4 MOT's with no problems. Hope this helps. Andy Quote Link to comment Share on other sites More sharing options...
Cornishbloke Posted June 9, 2014 Author Share Posted June 9, 2014 Hi Andy - that's interesting as everything I have read about the RB indicates permanent 4wd. How do you select between four and two wheel drive as I can't find anything to explain. Cheers Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
cosrec Posted June 9, 2014 Share Posted June 9, 2014 jack up any axle on any vehicle with a conventional diff and you can spin the wheel round and round thats what the diffs there for. Quote Link to comment Share on other sites More sharing options...
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