Propshaft help needed

[Lleksam]

Hi All

I guess this question had been asked before, but after many hours of searching I'm still no wiser

I have a 1994 Lexus LS400 engine and auto box the one with the 3 pounted output flange and rubber doughnut to prop-shaft, that I'm fitting into a Mitsubishi Delica, what I'm after is ideas how to convert flange to either a hardy splicer x type either directly or with a 4 bolt flange land rover style,

Please any Ideas or is there something that has a direct fit into gearbox that someone makes

thanks all

Steve

 

[gloverman]

Just machine the three part off and weld a flange similar to a diff flange onto it. No more issue.

 

[Alan Whitaker]

Hi
I made this adaptor, it bolts up to the gearbox output and the drive shaft just bolts to it.
Alan

 

[Lleksam]

Thanks Guys, was thinking of both ideas but then you read one post that says there is not enough support in gearbox to take side ways forces of a normal prop shaft, the more you read conflicting views of some that have ideas and some that have done in forums the less your sure of your ideas, so wanted to hear from someone who had done what i need to do

Thanks

Steve

 

[gloverman]

I sell my unit commercially and only sold about 100 so far over the last 5 years so not sure if they really work. Had them running on workshop conversions( was only about 15 in this stage) for 3 years before I sold them to others to use. Haven't had one fail or a gearbox fail as a result of running one but Ill let you know in a few more years.

 

[cribbj]

I sell my unit commercially and only sold about 100 so far over the last 5 years so not sure if they really work. Haven't had one fail or a gearbox fail as a result of running one but Ill let you know in a few more years.

Kelvin, sounds like you've already surpassed standard Toyota reliability with these

 

[Lleksam]

I sell my unit commercially and only sold about 100 so far over the last 5 years so not sure if they really work. Had them running on workshop conversions( was only about 15 in this stage) for 3 years before I sold them to others to use. Haven't had one fail or a gearbox fail as a result of running one but Ill let you know in a few more years.

thanks, Do you sell to UK? how much ? and postage?

I read some where that someone did them but could not fine post again

Steve

 

[Alan Whitaker]

Hi All

Easy to beef up your gearbox mount, not sure about welding, nut and bolt man, made mine out of titanium, The prop shaft guy lent me a flange so I could mark up the holes, Landy's use a 4 bolt flange, I used a heavy duty 6 bolt one, I have 3 X M10 holding the support plate and are using the std mounting rubber, hope to be in the 500 bhp or near it.


Alan

 

[Lleksam]

Thank you Gloverman, I didnt mean to offend, Im sorry if i did, Have found your website very useful, wish shipping from NZ was easier,


Steve

 

[gloverman]

Hello

I can ship to the UK. Flick the office a email to [email protected] also check out our facebook page. Cheers

 

[Alan Whitaker]

Hi
I think these guys make what you are after, they make some, just give them your bolt spacings.

http://www.blueprint-eng.co.uk/

Alan

 

[Alan Whitaker]

They make this for the Vauxhall Monza, Senator so if you give them the drawing they could do one for the Lexus to your joint.

Alan

 

[Lleksam]

Hi
I think these guys make what you are after, they make some, just give them your bolt spacings.

http://www.blueprint-eng.co.uk/

Alan

Thank you, wish i had access to a lathe and a mill could make one myself, I have a rotary table but sold mill few years back due to lack of use DOH

Steve

 

[Uklowranger]

I know this is a n old thread but when using one of these propshaft adapters from 3 to 4 studs do you still use the rubber doughnut or solid mount it.
Thanks for any reply.

 

[Zuffen]

Contact Gloverman a could of posts above.

A good guy to deal with.

 

[P Bateman]

This adapter is for removing the rubber donut and replacing it with a universal yoke-type tailshaft - not really really necessary on a standard or mild engine as the donuts are readily available and easy to replace.

You would normally use one for an engine conversion, as its quite difficult to find a standard slip-yoke for the A340... or if you are turbo/supercharged and ripping the donuts to pieces.

 

[Bonheur]

Esteemed greybeards, I’ve been hunting for answer to my problem and this thread is the closest I’ve found. Could anyone help me out here with my specific issue?

I’m doing a swap into a Hilux RN90 2wd pickup - UCF20 1UZ VVTI with A650. Both from a 4th Qtr ‘97 LS400. I bought a tail shaft from a different wrecker for a UCF20 ‘98 LS400.

Problem: the bolt hole diameter of the yoke on the gearbox is half a hole radius bigger than the yoke on the tail shaft, so the donut doesn’t fit and so I can’t bolt the tail shaft to the gearbox.

I made a solid steel donut coupling with two different bolt hole diameters, but my professional mechanic is adamant that I’ll destroy the gearbox if I use it.

Is he right? Is there a solution I haven’t thought of? Why doesn’t the UCF20 tail shaft fit the UCF20 gearbox?

Many thanks, Ant.

 

[P Bateman]

There are several different PCDs - I ran into this issue when I bought a billet adapter for the Toyota 3-bolt to a Hardy Spicer 4-bolt configuration, and they sent me the wrong one.

Making one yourself properly is complex - I know that the professionally made adapters are laser cut, or CNC machined, then surface ground on both sides so they are perfectly flat and parallel. Plus, they will normally have a hub ring or peg hole in the middle to ensure it's perfectly centred when fitted. Some manufacturers will even put them through a hardening process and dynamically balance them.

If you're wondering if your mechanic is right, consider this...

Let's say your stock engine makes 260hp 270Nm. Given the power multiplication that your transmission gives you in 1st gear (3.357:1 ratio), the coupling needs to withstand around 870hp and 1240Nm at full noise. Further to this, at when you're belting down the highway at 5000rpm, the speed multiplication in top gear (0.735:1 ratio) means your adapter will be spinning at 6800rpm.

Are you confident your home-made adapter is up to the task?

If it's not balanced and flat, it can induce a vibration into the prop shaft that with thrash the bearings/gearsets in the back of your transmission.
I deal with this shit every day because the back of an Allison 3000 series truck transmission is made from balsa wood, and any misalignment in the prop shaft angles will destroy the gearbox.

If you want my advice, your mechanic is correct - don't f&%k around with it. Either buy the correct shaft or have one professionally made.

PB

 

[Bonheur]

Thank you for that. I have no idea about how to find the correct part number for the correct PCD. I’ve got all the data plates so I’ll do a deep dive into the dark web and try to figure it out……

If anyone is reading this prior to starting a swap project - my learnings: buy the entire donor car - don’t just take the engine and box. Take literally everything, you never know what you might need!