Thread: LT95 Clutch Replacement

Originally Posted by Bearman

Hi Dave,
I am sure that you can't use a landy clutch on a normal truck flywheel. The cut out for the bolts in the centre of the flywheel is wider than the landy one and the landy clutch plate won't make full surface contact with the flywheel. Also the landy pressure plate wont fit because of the above and the fact that none of the boltholes would line up due to the different size pressure plate. The bolts and locating dowels for the truck clutch are larger than the landy ones. However I do know that there IS a truck flywheel that is the same one as the landy has. Even the pressure plate is the same. I found this out with the first landy conversion I did. I bought a 4BD1 from a truck wrecker with low K's and found out that it was fitted with the correct flywheel and clutch. It was definitely a truck motor as it still had the 24V electrics and truck flywheel housing and filter setup etc. The wrecker couldn't or wouldn't tell me what vehicle it came out of. I would think that it must be one of the smaller trucks (smaller clutch).

You sure that the centre hole is too large Brian?



Judging by crude measurements from the above pic, it seems as if the recess in the middle of the truck FW is slightly smaller than the friction material on the landie clutch.

Does anyone have an LT95 clutch plate they can measure? Then dave can measure his flywheel.

Originally Posted by bee utey

If you are running a 10 spline (4 speed) box the clutch plate I found for this is in this link as given below:

http://www.aulro.com/afvb/isuzu-land...utch-pain.html

The 5 speed runs a 23 spline by 26.25mm centre which is the same as some Mazdas and certain Mitsubishi 2 litre stuff, but nothing bigger than about 240mm plate size.

Dave has 2 clutch plates that are 300 mm OD and (the correct) 10-spline. The old one of unknown origin which nobody can find a match for, and a 2nd one which fouls on the spigot bush housing, and would need the splined section flipped to work.

I just got home and grabbed the tape measure to check out the inside diameter of the flywheel, clutch plates and pressure plates that I have. The flywheel ID (being the ID of the machined face outside the bolts) is about 184mm. The ID of the genuine and non-genuine truck pressure plates I have are both about 186, so slightly bigger than on the flywheel.

Both the old and replacement clutch plates have an ID of about 170, so both would have a "ring" about 7 or 8mm sitting in space in the uncompressed area between the flywheel and pressure plate, if that makes sense. The additional friction material on the inside of the clutch plate doesn't appear to interfere with anything and you can see the unworn part on the inside. Does anyone know if this will create a problem?

Clutch and pressure plates all have an OD of 300mm.

As Ben (isuzurover) suggests, it would be really helpful if someone had the measurements for a Land Rover flywheel so I can make a meaningful comparison.

Cheers, Dave.

Originally Posted by Dave_S

I just got home and grabbed the tape measure to check out the inside diameter of the flywheel, clutch plates and pressure plates that I have. The flywheel ID (being the ID of the machined face outside the bolts) is about 184mm. The ID of the genuine and non-genuine truck pressure plates I have are both about 186, so slightly bigger than on the flywheel.

Both the old and replacement clutch plates have an ID of about 170, so both would have a "ring" about 7 or 8mm sitting in space in the uncompressed area between the flywheel and pressure plate, if that makes sense. The additional friction material on the inside of the clutch plate doesn't appear to interfere with anything and you can see the unworn part on the inside. Does anyone know if this will create a problem?

Clutch and pressure plates all have an OD of 300mm.

As Ben (isuzurover) suggests, it would be really helpful if someone had the measurements for a Land Rover flywheel so I can make a meaningful comparison.

Cheers, Dave.

So the friction material on your clutch plate has an ID ~15mm smaller than the hole in the flywheel?

I am pretty sure I measured my flywheel and posted the specs on here - will have a look. It would help if someone could measure the ID of an LT95 (v8 or isuzu) CLUTCH PLATE though.

What is the OD of your flywheel and the OD of the pressure plate disc Dave?

Originally Posted by isuzurover

I just measured my landie version.
16.0 kg
390 mm across the machined face
390 mm across the ring gear
165 mm across the recess

though mine might weigh a bit less after the grooves have been machine out...

Dave - how does your flywheel compare???

http://www.aulro.com/afvb/isuzu-land...ml#post1053126

My flywheel is about 366mm across the machined face, with the ring gear outside that. It's about 184 across the recess. No idea what it weighs though. It looks like the area of the machined face on the truck flywheel (which I have) is somewhat smaller than the Land Rover one.

Originally Posted by Dave_S

My flywheel is about 366mm across the machined face, with the ring gear outside that. It's about 184 across the recess. No idea what it weighs though. It looks like the area of the machined face on the truck flywheel (which I have) is somewhat smaller than the Land Rover one.

That seems to correspond with Murray's measurements from his truck flywheel.

Originally Posted by Bush65

Isuzu truck flywheel housing is different to that fitted by Land Rover. Australian isuzu trucks have a 24V starter (2 bolt instead of 3) that is mounted lower and will interfere with the chassis.

The offset gear reduction method used in the starter, pushes the motor further away from the engine block.

You may be able to find a 12V starter with inline gear reduction that doesn't protrude as much. This is an option I am pursuing, but not urgent at this stage. Dougal uses a direct drive starter (but 12v motor running from 24v to gain more torque without gear reduction).

You will have to fabricate a gearbox mount for the left side.

The clutch slave cylinder is in a different location on the Isuzu truck.

The pilot bearing in the end of the crankshaft is different (6203 ball bearing with seals bot sides) - no mods needed (remove old nose piece and fit new bearing).

Clutch is different. Isuzu truck had 2 sizes (275mm and 300mm), if you use the smaller clutch plate to match the gearbox input shaft, one, you may not have to change the pressure plate. The bolt holes on your flywheel will not match the larger pressure plate - you may be able to drill new holes.

I don't know if the ring gear on your flywheel will be compatible with the truck starter.

Have you read this thread in the Isuzu forum? This would avoid a lot of these issues.

This is from the link above - John seems to be saying the 275mm flywheel should be fine with the 300mm pressure plate.

I just spoke to the guys at FWD in Brisbane. They have the LT85 Isuzu clutch plates in stock and measured one for me. They confirmed that the ID of the friction material is approx 175mm and the OD is 275mm. That should be the same measurement for the LT95 clutch plate.

I'm concerned that if I fit a Land Rover clutch plate it may start to drag as the friction material wears and part of it sits inside the recess. Does anyone know if I could get the centre friction material machined out to 185mm? Just a thought.

Originally Posted by Bearman

Why not just use a genuine turbo pressure plate and genuine clutch plate. The numbers are here on this thread.

Do it once, do it well, and do it for keeps.