Cliffordtdi Posted November 1, 2017 Share Posted November 1, 2017 Were 4.1 Ratio diffs that were 24 spline ever made? I need some to make my final drive ratio right Quote Link to comment Share on other sites More sharing options...
Ex Member Posted November 1, 2017 Share Posted November 1, 2017 The diffs and the ring and pinion gearing are separate things that are not related. 4.1 ring and pinions are available from aftermarket suppliers. They were never supplied from the factory. Quote Link to comment Share on other sites More sharing options...
Cliffordtdi Posted November 1, 2017 Author Share Posted November 1, 2017 5 minutes ago, Red90 said: The diffs and the ring and pinion gearing are separate things that are not related. 4.1 ring and pinions are available from aftermarket suppliers. They were never supplied from the factory. Thanks Red90, Someone had led me to believe that 4.1's were fitted in some MOD ambulances, obviously that was misleading. Thanks for your help Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted November 1, 2017 Share Posted November 1, 2017 I think some old Rover cars used 4.1s, but by now they are all dead and buried or in use. Go aftermarket, best way, they are stronger than stock by a long way. Quote Link to comment Share on other sites More sharing options...
Cliffordtdi Posted November 1, 2017 Author Share Posted November 1, 2017 Just now, Bowie69 said: I think some old Rover cars used 4.1s, but by now they are all dead and buried or in use. Go aftermarket, best way, they are stronger than stock by a long way. And fit them to 3.54 diffs? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted November 1, 2017 Share Posted November 1, 2017 Umm, not entirely sure what you are asking there. But... the 24 spline diff carrier that looks like this: Can have any of the available ratios bolted to it, the crown wheel comes off with ~10 bolts, and the pinion comes out with a big nut, new bearings and set it up and be done. It is not a particularly easy job if you are not experienced, and for that reason you may want to look at getting a pair of diffs built up for you, and drop them in and done. Why do you need to fix the gearing? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted November 1, 2017 Share Posted November 1, 2017 You can price up a new drop in unit here, and add all manner of lockers or LSDs to it: http://www.ashcroft-transmissions.co.uk/differentials/stock-rover-type-diffs.html Quote Link to comment Share on other sites More sharing options...
Cliffordtdi Posted November 1, 2017 Author Share Posted November 1, 2017 Ah i see, that makes sense. I wondered if it was an easy swap to remove the 3.54 pinion and crown wheel and just replace them with the 4.1 items. Quote Link to comment Share on other sites More sharing options...
SumDarkPlace Posted November 1, 2017 Share Posted November 1, 2017 Aftermarket 4.1 CW&P are a direct replacement, and much stronger. Some old Rover cars had a 4.1 CW&P that fits with a spacer, but they're really not strong enough, and aren't easy to find. I recently discovered one on an ARB locker I took to Nigel. Looked so close to a standard 3.54 that even Nige mistook it for one at first! I can recommend Xcess 4x4 for diffs (Nige, Hedghog_from_Hell on here). He's got a wealth of knowledge to see you right Quote Link to comment Share on other sites More sharing options...
AV8R Posted November 3, 2017 Share Posted November 3, 2017 On 1-11-2017 at 2:44 PM, Cliffordtdi said: Thanks Red90, Someone had led me to believe that 4.1's were fitted in some MOD ambulances, obviously that was misleading. Thanks for your help Could it be that the person informing you was mistaken with 1.4 to 1 ratio in the transfer box ? That would make sence for a heavily equipped ambulance. BTW that might solve your problem too , , , , , , , , , , , , I've had several ratios in the LT230 fitted in my 88" last year and it really makes a huge difference going from 1.2:1 to either 1.4:1 or 1.003:1 Quote Link to comment Share on other sites More sharing options...
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