Rubber coupling Propshaft 2009 ISF

[Timmy Love]

Hi

I have some cracks forming on the rubber coupling that connects the propshaft to the differential on my 2009 ISF, Lexus are saying I need to replace the propshaft!!! Any ideas where I could get a coupling from? Thanks in advance. Tim

[4969_LXS]

Hi Tim,

Have a read of this thread on the American forum.

The propshaft rubbers are also known as guibos

Looks like we can use Supra one's if we can still get them.

https://www.clublexus.com/forums/is-f-2008-2014/842004-guibo-flex-coupling-replace-rubber-coupling-or-whole-ds.html

 

 

 

 

[ColinBarber]

4 hours ago, 4969_LXS said:

Looks like we can use Supra one's if we can still get them.

The Supra ones are also used on the Lexus SC430 5-speed (and GS430/LS430), which was sold until 2005 so hopefully the parts are still available. 

On the 6-speed SC430 they switched to the same situation as the IS-F, only supplied fitted to the whole prop. Not sure why they did this, maybe they balance the entire prop with the couplings attached.

[4969_LXS]

@ColinBarber From reading on the American forums, the couplings are bonded on the propshaft. However a few owners stateside say they do come off with no bonding visible, at least to them. 

With the part being used that widely, I reckon they are still manufactured. I'm guessing with some confidence that it was probably used on the GSF and RCF as well. Stands a chance they use the same coupling on the LC500 V8's. It's cheaper to use existing products that work, than develop and use new.

 

[ColinBarber]

1 hour ago, 4969_LXS said:

With the part being used that widely, I reckon they are still manufactured. I'm guessing with some confidence that it was probably used on the GSF and RCF as well. Stands a chance they use the same coupling on the LC500 V8's. It's cheaper to use existing products that work, than develop and use new.

Yes, it certainly looks the same as the one used on the GS F and RC F. The problem is that the part isn't available on its own - there is no part code.

[scott-o]

37511-30020

Thats the part number for the Mk4 Supra coupling. I know some of the specialists have stated theres no bonding, its just bolted as you'd expect.

Some of them have also stated that they've had cracks showing for 50k+ miles and they get no worse, not even when supercharged, i assume there are steel wires or such actually providing the strength internally and everything is coated in rubber, which obviously degrades to some degree over time. 

[Timmy Love]

On 6/10/2021 at 2:14 PM, 4969_LXS said:

Hi Tim,

Have a read of this thread on the American forum.

The propshaft rubbers are also known as guibos

Looks like we can use Supra one's if we can still get them.

https://www.clublexus.com/forums/is-f-2008-2014/842004-guibo-flex-coupling-replace-rubber-coupling-or-whole-ds.html

 

 

 

 

Great thanks, I have the genuine part delivered for £156, hopefully my garage can sort it! 

[Timmy Love]

On 6/14/2021 at 9:54 AM, scott-o said:

37511-30020

Thats the part number for the Mk4 Supra coupling. I know some of the specialists have stated theres no bonding, its just bolted as you'd expect.

Some of them have also stated that they've had cracks showing for 50k+ miles and they get no worse, not even when supercharged, i assume there are steel wires or such actually providing the strength internally and everything is coated in rubber, which obviously degrades to some degree over time. 

That's great thanks, I did wonder if there would be more integral strength but not worth the risk! I have the part required delivered for £156. Just hope my garage can sort it! I will post an update in case anyone else has the same issue.

[Timmy Love]

On 6/10/2021 at 2:14 PM, 4969_LXS said:

Hi Tim,

Have a read of this thread on the American forum.

The propshaft rubbers are also known as guibos

Looks like we can use Supra one's if we can still get them.

https://www.clublexus.com/forums/is-f-2008-2014/842004-guibo-flex-coupling-replace-rubber-coupling-or-whole-ds.html

 

 

 

 

Brilliant thanks, this has been confirmed by several sources, I have a genuine part delivered for £156, just hope my garage can fit it ok! 

[4969_LXS]

@Timmy Love long time since this was posted but do you have an update, mine will need doing soon

[santa99]

On 6/14/2023 at 7:09 PM, 4969_LXS said:

@Timmy Love long time since this was posted but do you have an update, mine will need doing soon

I have the same issue. @Timmy Love did you manage to sort it out? 

Thanks.

[RichGS11]

It's a relatively easy to replace. The only issues are exhaust and heatshield removal taking into account removal or disconnection of downstream O2 sensors.

Once you're past the heatshield it's easy.

[santa99]

1 hour ago, RichGS11 said:

It's a relatively easy to replace. The only issues are exhaust and heatshield removal taking into account removal or disconnection of downstream O2 sensors.

Once you're past the heatshield it's easy.

Thanks for detailed overview but is it technically feasable to apply MK4 Coupling Flex Dics on ISF driveshaft?

[Jon Dee]

https://www.lexusownersclub.co.uk/forum/topic/146736-gs-450h-propshaft-damper-replacement/#comment-1351997

[RichGS11]

12 hours ago, santa99 said:

Thanks for detailed overview but is it technically feasable to apply MK4 Coupling Flex Dics on ISF driveshaft?

I couldn't possibly say on that one I'm afraid. I'd check on parts websites to see if it's the same part number across the two models.

[Jon Dee]

Bit of information here shamelessly stolen from a BMW site....

[santa99]

Thanks guys for you replies. I will probably order a new shaft with flex disc directly from Japan. It's 4times cheaper than the dealers offer. 

MK4 supra flex disc costs 750euros. Insane.