Hybrid_From_Hell Posted March 16, 2022 Share Posted March 16, 2022 Hello all, 1st, I have a genuine 1985 LR V8 90 with a Factory fitted LT85 Gearbox and the 3.5 V8 gone and a 5.2 full race Jon Eales Triple Plenum V8 in its place Prob is the clutch has exploded and will need complete replacement .. My thoughts have turned to an auto....and this is an area I have f all knowledge in so asking here for input and thoughts to various Questions Q1 the 5.2 chucks out 342 BHP at 7250 RPM and near 400 Ft Lbs max torque will a ZF22 cope with it?....equally will a ZF22 with ZF 24 stronger internals special build cope either ? Q2 Is the length of the auto unit ZF22/24 combo similar / longer / shorter than the standard LT85 ? Q3 Other than "Shifter positioning fun" will the auto fit under the Panel work / tunnel etc ? Q4 Is the ZF whichever wider of dimensionally that different to mean I would have to remake parts of the exhaust to fit, as its a custom made big bore system, guess this links to Q2 ?? Q5 Are all ZF22/24 combo using the same shifter kit position etc or are RR and say disco units different ? ..............and finally what else might I need to think over ? or Do I just put a new unit n there ....just I quite fancy an auto ...... No, I don't want a TF 727 as they sap power and are only 3 speed Nige Quote Link to comment Share on other sites More sharing options...
mad_pete Posted March 16, 2022 Share Posted March 16, 2022 Changed mine from lt85 to zf auto and the tunnel was different and you need different high low linkage. I can do pictures if zf out of a classic would be the same size as you are thinking. Mine had v8 engine mount position and I didn’t change anything putting the auto in. Quote Link to comment Share on other sites More sharing options...
mad_pete Posted March 16, 2022 Share Posted March 16, 2022 Shifter is on a bit of cable so I don’t think it matters unless it has a different cable length between models. Quote Link to comment Share on other sites More sharing options...
Popular Post Nonimouse Posted March 16, 2022 Popular Post Share Posted March 16, 2022 2 10 Quote Link to comment Share on other sites More sharing options...
Snagger Posted March 16, 2022 Share Posted March 16, 2022 And yet you are planning to do the same to your Discovery, David! They certainly have their place. Driving around town over here in a manual, with all the traffic and horribly planned junctions would be a slog in a manual. Driving in town in Seattle, having visited that friend with the Cummins 90 and Tdi 109SW, with all the hills and junctions would be a pain, with dozens of steep hill starts to deal with, so no wonder he is debating a ZF for them both. Then there is the rapid changes when driving in boggy conditions or soft sand. But the lack of acceleration is very annoying when you need to overtake, and I don’t think I’d like the loss of engine braking down hill. 1 Quote Link to comment Share on other sites More sharing options...
mad_pete Posted March 16, 2022 Share Posted March 16, 2022 Can we not do the auto vs manual thing (again) ? 🙂 1 Quote Link to comment Share on other sites More sharing options...
Gazzar Posted March 16, 2022 Share Posted March 16, 2022 Go electric. Problem gone. Quote Link to comment Share on other sites More sharing options...
Nonimouse Posted March 16, 2022 Share Posted March 16, 2022 1 hour ago, Snagger said: And yet you are planning to do the same to your Discovery, David! I just like that diagram 1 Quote Link to comment Share on other sites More sharing options...
smallfry Posted March 16, 2022 Share Posted March 16, 2022 Auto. Much better. The only real reason to have a 4hp22 upgraded with 4hp24 internals, is to retain the hydraulic control. Much better to use the whole 4hp24 (with different output shaft is necessary)and use Compushift or similar for full electronic programmable control. Might have had 342hp and 400lbs when built, but now your camshaft is worn out broken in, you may as well install an alloy block BMW M57 LCE diesel, which will out accelerate it easily, more power, more torque, and give you more MPG. It can come with a 6HP26 which you will struggle to break. Only needs an adaptor to the transfer box and a standalone ECU loom. Apart from the engine mounts and exhaust, its all standard parts. Quote Link to comment Share on other sites More sharing options...
smallfry Posted March 16, 2022 Share Posted March 16, 2022 3 hours ago, Nonimouse said: This illustration is only valid if you have crushing disappointment also going into the front end ! Quote Link to comment Share on other sites More sharing options...
Les Brock Posted March 16, 2022 Share Posted March 16, 2022 Clutch leg in Plaster ?? 😁 3 Quote Link to comment Share on other sites More sharing options...
Daan Posted March 16, 2022 Share Posted March 16, 2022 Do a search on L322 gearbox failures. They have about 300hp with a ZF24. If you still want an auto after this I can only conclude you are deranged. What clutch are you using? I would look at adapting an AP racing clutch or similar. Daan 1 Quote Link to comment Share on other sites More sharing options...
Nonimouse Posted March 16, 2022 Share Posted March 16, 2022 I'd look at what you want to do with the vehicle. Off road a manual is better - far more control unless in sand Street racing - manual is better Ultraboring 4x4 - auto is better, with cruise control Asda Car Park - Auto is better, with a line lock to allow for better burn outs Driving like a twonk - who cares If it was me, I'd go for a manual, and I actually like Auto's Quote Link to comment Share on other sites More sharing options...
Chicken Drumstick Posted March 16, 2022 Share Posted March 16, 2022 For me I generally find autos annoying and less fun. So I’d want a manual on this basis. The LT85 is quite agricultural, even for a Land Rover box! Wonder how easy it would be to swap in a ZF 6 speed (Disco3/BMW) manual or Getrag 6 speed from a Puma? Quote Link to comment Share on other sites More sharing options...
geoffbeaumont Posted March 16, 2022 Share Posted March 16, 2022 18 minutes ago, Chicken Drumstick said: Wonder how easy it would be to swap in a ZF 6 speed (Disco3/BMW) manual or Getrag 6 speed from a Puma? What would be the point with the torque @Hybrid_From_Hell has at his disposal? It'd just result in unnecessary gear changing. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted March 16, 2022 Share Posted March 16, 2022 This thread doesn't stand a chance. Some folks like manuals, some folks like autos, both have pros & cons, both can be made to do whatever you want, so pick whatever you like and go with it. There is no right answer - just like the 1000 other times this argument has come up. Quote Link to comment Share on other sites More sharing options...
miketomcat Posted March 16, 2022 Share Posted March 16, 2022 6 minutes ago, FridgeFreezer said: This thread doesn't stand a chance. Some folks like manuals, some folks like autos, both have pros & cons, both can be made to do whatever you want, so pick whatever you like and go with it. There is no right answer - just like the 1000 other times this argument has come up. Who are you. What have you done with fridge! Start talking like that you'll be liking diesels next. Personally putting an auto behind your engine seems a crying shame. Just sort the clutch. Gearbox if you need to. Mike 1 1 Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted March 16, 2022 Author Share Posted March 16, 2022 6 hours ago, Nonimouse said: Where the “age” arrow 😂😂😂 Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted March 16, 2022 Author Share Posted March 16, 2022 L322 box word are erm …. Yup think I have too much bhp / torque now done research 🤦♂️ engine out time soon Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted March 16, 2022 Author Share Posted March 16, 2022 1 hour ago, Daan said: Do a search on L322 gearbox failures. They have about 300hp with a ZF24. If you still want an auto after this I can only conclude you are deranged. What clutch are you using? I would look at adapting an AP racing clutch or similar. Daan “F” 😬😬😬😬😬😬😬🥺 Quote Link to comment Share on other sites More sharing options...
Daan Posted March 16, 2022 Share Posted March 16, 2022 3 minutes ago, Hybrid_From_Hell said: “F” 😬😬😬😬😬😬😬🥺 Sorry for being direct, but you can take the abuse! 1 1 Quote Link to comment Share on other sites More sharing options...
bishbosh Posted March 16, 2022 Share Posted March 16, 2022 (edited) My L322 has 700Nm as standard and the autobox is epic. 😛 The autobox behind the TD6 is the suspect one - don't go there! Edited March 16, 2022 by bishbosh Quote Link to comment Share on other sites More sharing options...
Chicken Drumstick Posted March 16, 2022 Share Posted March 16, 2022 2 hours ago, geoffbeaumont said: What would be the point with the torque @Hybrid_From_Hell has at his disposal? It'd just result in unnecessary gear changing. But that would be the fun part! Quote Link to comment Share on other sites More sharing options...
smallfry Posted March 16, 2022 Share Posted March 16, 2022 3 hours ago, Daan said: Do a search on L322 gearbox failures. They have about 300hp with a ZF24. If you still want an auto after this I can only conclude you are deranged. What clutch are you using? I would look at adapting an AP racing clutch or similar. Daan That will be the 5hp24. Different type of lightweight geartrain and quite frankly, rubbish. Quote Link to comment Share on other sites More sharing options...
elbekko Posted March 16, 2022 Share Posted March 16, 2022 Plenty of gearboxes around that can take that power, manual and auto. Grab a Tremec manual, Rakeway has adapters for them. 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.