Need help with P0740 code on '21 RT - looks like the clutch. Anyone?

[sgerksinwi]

Can't get my laptop to open to look it up.
Need help with a P0740 error code? Search looks like Clutch...
Battery unhooked.
Finally got the bike back.
It was a shift shaft assembly and snap rings gaskets etc.
Thanks for the help..

 

[JKMSPYDER]

P0740. TCM BOSCH. Clutch torque transfer performance too low. Cause - Clutch coefficient of friction low. Clutch kisspoint pressure high. Maximum clutch pressure low. Action - change engine oil. Replace clutch if friction coefficient or offset out of service limits. Replace HCU if max clutch pressure too low.

 

[BajaRon]

Can't get my laptop to open to look it up.
Need help with a P0740 error code? Search looks like Clutch...
Battery unhooked.

Did you change the oil recently?

 

[Snowbelt Spyder]

and..how many miles on the machine? Are you due for an HCM filter change. Sounds hydraulic pressure related.

 

[BajaRon]

and..how many miles on the machine? Are you due for an HCM filter change. Sounds hydraulic pressure related.

Yes, that too, good catch. Though I've not seen any clogged HCM filters.

 

[sgerksinwi]

Oil change has less than 1500 miles on. Amsoil in it.
Got an HCM filter in my basement to change this fall when I would have done the next change. From you Ron, thanks you're the man.
Just got a call from the dealer.
Got bad solenoid or solenoids in clutch/ transmission.
$1300 in parts + labor. Hoping to find out more on that when he calls me back. We'll see how the BEST Warranty is going to handle it.
Update to follow...

 

[BertRemington]

Prior to this fault code were you observing any flare on upshifts or downshifts, especially when during hot weather or slow traffic conditions? If you were clutch plates might be affected too.

The HCM has its own pressure and scavenge pumps with a line pressure twice as high as engine oil pressure along with separate oil pressure and temperature sensors controlled by a fairly sophisticated TCM.

This is a curious failure. I hope things work out for you and you're on the road for springtime.

 

[EdMat]

If it happened all of a sudden it might just be a bit of grit stuck in a valve. I think BUDS can be used to force the valves to fully open and that might flush it out.

 

[T.P.]

https://www.spyderlovers.com/forums...020-F3-Fault-Codes-P194E-P278F-P0740-any-help

MRS.T.P'S Spyder had that code last Fall

T.P.

 

[BajaRon]

https://www.spyderlovers.com/forums...020-F3-Fault-Codes-P194E-P278F-P0740-any-help

MRS.T.P'S Spyder had that code last Fall

T.P.

From what I understand, this was a hardware failure on the clutch basket. Sounds like sgerksinwi has a solenoid problem. We have dealt with a few of these. But they were either due to damaged wiring (mice/rats) or physical damage to the solenoid in a collision.

Hopefully, the extended warranty will take care of it.

It is amazing that people are so quick to point the finger at Amsoil when, as far as I know, there has never been an Amsoil related issue.