Les Brock Posted May 4, 2006 Share Posted May 4, 2006 So a subject I'm useless at... On the Disco i've fitted 265/75/16's with the standard transfer box which IIRC is a 1.2:1 but its lost all its omphhh with the Pikey van on the back....would a 1.4:1 improve it ????? Muppetry... = me and gears Quote Link to comment Share on other sites More sharing options...
Mark90 Posted May 4, 2006 Share Posted May 4, 2006 Yes. You've put defender sized tyres on so the defender 1.4 ratio transfer box will suit quite well. Quote Link to comment Share on other sites More sharing options...
Les Brock Posted May 4, 2006 Author Share Posted May 4, 2006 "Sparklin" So who's got one for sale cheap then ? Pref going to West Harptree on the 14th(here's hoping).... Quote Link to comment Share on other sites More sharing options...
Guilford Dave Posted May 4, 2006 Share Posted May 4, 2006 "Sparklin"So who's got one for sale cheap then ? Pref going to West Harptree on the 14th(here's hoping).... Les I think the one I have must be 1.4. Out of a 2.5 petrol,, unfortunantly it hasnt got the ratio on the side of it. Anybody know how to tell from the serial number. Dave Quote Link to comment Share on other sites More sharing options...
landrover598 Posted May 4, 2006 Share Posted May 4, 2006 How does go without the pikey van ? Chaning mine from a 1.4 to 1.2 sometime in the next few weeks and am hoping it won't be too over geared Is your disco standard tdi? Quote Link to comment Share on other sites More sharing options...
Les Brock Posted May 4, 2006 Author Share Posted May 4, 2006 Dave 1, That'd be good if we can find out... Dave 2, Yep, standard TDi goes well without the pikey on !, but just means I have to keep dropping gears with the van on the back and zero....Omppphhhh on the hills and acceleration is poor...take van off its fine... not sure why it works that way ?....I just don't understand gears..... Now if Mark could put the results of his gearing doda up for both ratio's it would be superb....as I don't have Exel.. Quote Link to comment Share on other sites More sharing options...
landrover598 Posted May 4, 2006 Share Posted May 4, 2006 Excellent, I've got standard 200 with 265/75 aswell, and can't tow more then 3/4 ton anyway so should be fine When i was looking at Marks datasheet, there's about a 10mph difference on the M-way between the two boxes Quote Link to comment Share on other sites More sharing options...
Les Brock Posted May 4, 2006 Author Share Posted May 4, 2006 got 1600 Kilo's on the back of mine ! Quote Link to comment Share on other sites More sharing options...
landrover598 Posted May 4, 2006 Share Posted May 4, 2006 Just checked the datasheet 1.2 box - 2500 rpm = 70.8 mph 1.4 box - 2500 rpm = 61.2 mph 1.6 box - 2500 rpm = 51.9 mph or 1.2 box - 70 mph = 2500 rpm 1.4 box - 70 mph = 2875 rpm 1.6 box - 70 mph = 3400 rpm Edited, hate gearing as much as you Les Quote Link to comment Share on other sites More sharing options...
Les Brock Posted May 4, 2006 Author Share Posted May 4, 2006 1.6 ? prob to much...would that slow the acceleration down....or up.... Top speed would be higher.... God I hate gearing Quote Link to comment Share on other sites More sharing options...
JST Posted May 4, 2006 Share Posted May 4, 2006 i think the 2.5 petrol will have a 1.6:1 box, mine did. Quote Link to comment Share on other sites More sharing options...
landrover598 Posted May 4, 2006 Share Posted May 4, 2006 I've edited the 1.6 into my last post, confusing numbers Quote Link to comment Share on other sites More sharing options...
Les Brock Posted May 4, 2006 Author Share Posted May 4, 2006 I'm off to work now , I'll catch up tommorow....... In the mean time........ just tell me what I need to tow 1600 Kg with 265/75/16's at a decent speed, with resonable acceleration and keeping the revs down...... Don't want much do I... Seriously what my best option... Ta ! Quote Link to comment Share on other sites More sharing options...
white90 Posted May 4, 2006 Share Posted May 4, 2006 post the serial number I may be able to ID the ratio etc inside it will not have a x drilled input gear though I'd budget to fit one if I were you. Quote Link to comment Share on other sites More sharing options...
white90 Posted May 4, 2006 Share Posted May 4, 2006 RE: In the mean time........ just tell me what I need to tow 1600 Kg with 265/75/16's at a decent speed, with resonable acceleration and keeping the revs down...... A bigger engine I'm going to tow our Van to Norfolk this summer with the Defender on 255/85s it weighs 21CWT apparently Quote Link to comment Share on other sites More sharing options...
darthdicky Posted May 4, 2006 Share Posted May 4, 2006 In the mean time........ just tell me what I need to tow 1600 Kg with 265/75/16's at a decent speed, with resonable acceleration and keeping the revs down...... 1.2 is what you have, at 70mph you get low revs and noise but no acceleration 1.4 is lower geared so at 70mph you have slightly higher revs, but this gives better acceleration 1.6 is even lower geared so at 70mph your ears will be hurting from the screaming engine but it'll accelerate very well (until you hit the rev limiter, at about 80mph) I'd go for a 1.4 box as this will cancel out the larger tyres (give or take a bit) so it will feel similar to a Disco running normal sized tyres which tows well. 1.6 boxes were standard in 2.5 petrol and N/A diesel 110's only, if its from a 90 it's probably a 1.4. Richard Edited as I couldn't work out the difference between + and * Quote Link to comment Share on other sites More sharing options...
Diff Posted May 4, 2006 Share Posted May 4, 2006 2.5 petrol 90s were fitted with 1.4 ratio transfers, 2.5 petrol 110s were fitted with 1.66 ratio transfers. If Dave's came from a 90, it 'should' be a 1.4. Though of course it could have been changed at some point. 1.66 transfers were generally only fitted to civvy 2.25, 2.5 petrol and n/a diesel 110s. All 4 cylinder 90s and 2.5 turbo diesel and Tdi 110s had 1.4 transfers. There is always the odd anomally though! Regards, Diff Quote Link to comment Share on other sites More sharing options...
Guilford Dave Posted May 4, 2006 Share Posted May 4, 2006 2.5 petrol 90s were fitted with 1.4 ratio transfers, 2.5 petrol 110s were fitted with 1.66 ratio transfers.If Dave's came from a 90, it 'should' be a 1.4. Though of course it could have been changed at some point. 1.66 transfers were generally only fitted to civvy 2.25, 2.5 petrol and n/a diesel 110s. All 4 cylinder 90s and 2.5 turbo diesel and Tdi 110s had 1.4 transfers. There is always the odd anomally though! Regards, Diff Thanks Diff, You have just confirmed what I have have just found out after half a hour sorting the shed out to get at the gearbox. Yours Les for £65.00 Dave Quote Link to comment Share on other sites More sharing options...
white90 Posted May 4, 2006 Share Posted May 4, 2006 what is the serial number? Quote Link to comment Share on other sites More sharing options...
Mark90 Posted May 4, 2006 Share Posted May 4, 2006 Here you go Les a comparison of your disco with 1.222 and 1.41 transfer boxes..... Remember these speeds will be actual speeds, not speedo speeds, assuming the tyre rolling diameter is acurate enough. A few people fit the 1.2 ratio box to defenders to get the gearing that you have currently for more relaxed cruising at the expense of acceleration and towing umph. Some people seem to like the higher gearing, some don't, I think it depends on driving style / preference and the power/torque of the engine, not all TDI's are equal. You are obviously finding issues with it, so I'd go for the 1.4 box if I was you, that will give you standard 110 gearing with those tyres, but keep the old 1.2 box in case you don't like the 1.4 you can easily swap back. Quote Link to comment Share on other sites More sharing options...
ashtrans Posted May 4, 2006 Share Posted May 4, 2006 this may be useful, from our website : List of Serial numbers and corresponding Ratios All stock LT 230"s have a low ratio of 3.321, the following list refers to the high range ratio. 12D = 1.667 LT 230R 13D = 1.410 LT 230R 14D = 1.003 LT 230R 15D = 1.192 LT 230R 20D = 1.667 (2.5 N/A 110), 22D = 1.410 (all 4Cyl 90/110 bar above), 25D = 1.410 (V8 110 LT 85), 26D = 1.003 (RR Classic 3 speed auto), 27D = 1.192 (early RR Classic), 28D = 1.222 (RR and Disco I), 29D = 1.192 (V8 90 LT 85), 32D = 1.222 34D = 1.410 (2.0 Disco I), 36D = 1.211 38D = 1.211 40D = 1.211 (NAS/Japan 90&Disco), 41D = 1.211 (Disco II, diff lock stud), 42D = 1.211 (Disco II, diff lock stud), 43D = 1.410 (90/110 TD5), 57D = 1.410 (90/110 TD5), 61D = 1.211, 62D = 1.211, 68D = 1.211, 69D = 1.211, 70D = 1.211 (Disco II, no diff lock), LT 230 Transfer case comparisons 1.003 > 1.222 = 17.92% Drop 1.003 > 1.410 = 28.86% Drop 1.003 > 1.667 = 39.83% Drop 1.222 > 1.003 = 21.80% Raise 1.222 > 1.410 = 13.33% Drop 1.222 > 1.667 = 26.70% Drop 1.410 > 1.003 = 40.57% Raise 1.410 > 1.222 = 15.38% Raise 1.410 > 1.667 = 15.41% Drop 1.667 > 1.003 = 66.20% Raise 1.667 > 1.222 = 36.41% Raise 1.667 > 1.410 = 18.22% Raise For those considering a ratio change the following may prove useful. MPH per 1000 rpm = 2.976D/ MTR -------------------------------------------------------------------------------- D Tyre diameter in inches (more accurate to use 2 x rolling radius) -------------------------------------------------------------------------------- M Typical 5 speed manual box, select a ratio 1st 3.60 These ratios will vary a little between box types 2nd 2.11 3rd 1.40 4th 1.00 5th 0.77 Rev 3.43 -------------------------------------------------------------------------------- T Transfer ratio select a ratio High 1.003 1.222 1.410 1.667 Low 3.321 -------------------------------------------------------------------------------- R Differential select a ratio 4.70 S 4.11 L 3.54 S L Special S stock Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted May 4, 2006 Share Posted May 4, 2006 Or tweek the fuelling & boost to give you some more oooooomph! Quote Link to comment Share on other sites More sharing options...
Turbocharger Posted May 4, 2006 Share Posted May 4, 2006 I'd say stick with what you've got. If 5th gear is beyond what you want then use 4th; the number on the gearstick doesn't matter, it's the ratio that does. If you swap boxes, your new 5th will be halfway between 4th and 5th currently - will 'half a gear' help? I use a 1.2 in my Defender, because it was too revvy at speed. I'd say a 1.4 box is the solution if you're having trouble with 1st gear, not 5th. Quote Link to comment Share on other sites More sharing options...
sgnas Posted May 4, 2006 Share Posted May 4, 2006 Well said. MyTD 90 used to tow this pikey van no problems, even with it's weak ~80HP engine, right up to the legal limit on the A303, A34 and M4. Obviously it slowed on the hills, but it's a bloody big van! 50mph was fine cruising. 60mph was possible but a bit worrying as I knew if it got a bit waggy you were unlikely to "save" it. Getting sucked in to overtaking lorries was a bit frightening too. When I sold it some of the interested buyers seriously thought they could tow it with a Ford Escort/Vauxhall cavalier etc. I currently have a 17ft 6berth single axle and the 90 will do 60 with that no probs. This however has a noseweight of over 350kg and estimated over 3000kg weight. Now, obviously, it's entirely illegal to tow it on the road with a Land Rover so I couldn't say how well it went might go . I can say however that when it was hooked to a Jeep wrangler that was going to tow it the bumpstops were compressed! Quote Link to comment Share on other sites More sharing options...
Les Brock Posted May 11, 2006 Author Share Posted May 11, 2006 Futher on from this....it may not be just a gearing issue, Used the pikey van the last weekend long hill, getting near the top.....and she starts slowing down....Oh Fupp Eases of the smokey pedal and drop a gear and nurse it to the flat section, did'nt fancy a hill start anyway she's huffing and pufffing, won't rev etc, thinks no fuel, get out the 10mm spanner open the bleed screw on the filter all air and no fuel 20 seconds'ish later it's pumping a bit of fuel and air bleed it all through and off we go no problems. Take it down to the tyre place where the company gets all our tyres from and stick it on the smoke tester..... allowed 3.9 IIRC revs the dobry's off it......whinces and it manages.........0.7......do you think it might be a tad underfuel'd ? so with the van off its fine, with the van its on its as flat as a Witches T*t (No Reference to Mand ) Checked the boost and it just hits 0.7 Bar think I need to do a bit of tweeking (the fueling not the Witches t*t) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.