loss of drive
loss of drive
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Discussion

ian1986

Original Poster:

11 posts

152 months

Sunday 22nd September 2013
quotequote all
I am learning the tvr life style the hard way. I have had it a week and now the third thing has broken. I am still running the engine in so haven't been driving it hard, as i pulled away from a set of lights today there was a bit of a crunch and i lost all drive. Managed to coast it to a stop but as soon as you let the clutch back out there's grinding noise. I can still select every gear but go nowhere. In guessing clutch but it has only done 1200 miles as was replaced when the engine and gearbox was rebuilt. Any ideas or am i right in thinking its the clutch?

Tanguero

4,535 posts

225 months

Sunday 22nd September 2013
quotequote all
Sound more like a drive shaft to me as the clutch doesn't usually make a noise when it goes. You should be able to feel if a drive shaft is loose reaching underneath the back.

Don't worry too much - the car is just trying you out to see who is boss.

ian1986

Original Poster:

11 posts

152 months

Sunday 22nd September 2013
quotequote all
Just had a look and from what i can see the left hand drive shaft didn't look right. Will investigate further in better light tomorrow and let you know. Thanks for the advice.

esso

1,849 posts

241 months

Sunday 22nd September 2013
quotequote all
Could be a broken CV joint on the driveshaft,i had one go a few months ago,if the actual driveshaft is not broken the CV joints can be replaced at resonable cost.

ian1986

Original Poster:

11 posts

152 months

Monday 23rd September 2013
quotequote all
Yep the left hand inboard cv joint has gone. I gave it a wobble and all the bearings fell out. Where is the best place to get new one? Was thinking about replacing both cv joints and the shaft whilst i have it apart and keeping the old bits for spares.

ackbullchang

270 posts

234 months

Monday 23rd September 2013
quotequote all
Hi Ian, parts can be ordered from a number of places including but not exclusive to Tvr Power, Racing Green, Clever Trevor etc. just look at their websites. Not a Cerb owner, but if you can find if the cv joint is off a mainstream car I.e. Cosworth etc, then you may find them cheaper from a motor factor.

Tanguero

4,535 posts

225 months

Monday 23rd September 2013
quotequote all
Prolinx sell GKN joints, they are better quality and a fraction of the TVR specialists price.
Details in the alternative parts sticky.

esso

1,849 posts

241 months

Monday 23rd September 2013
quotequote all
To give you some idea of cost I had both CV joints replaced using the original shaft for £200.....a complete new one from TVR specialists are around £600.

ian1986

Original Poster:

11 posts

152 months

Monday 23rd September 2013
quotequote all
Cheers for the help. Will get ordering tonight and hopefully be back on the road by next week.

Supateg

799 posts

166 months

Monday 23rd September 2013
quotequote all
Tanguero said:
Prolinx sell GKN joints, they are better quality and a fraction of the TVR specialists price.
Details in the alternative parts sticky.
Another vote for Prolinx, (Refurbed o/s shaft on mine this year) They do a nice tough boots also(no clips).
Redline Synthetic Grease, new bolts job done.

Check the other joint for wear marks, for the sake of £60 its worth doing too.

Bolt sizes, torques above

ridds

8,366 posts

268 months

Monday 23rd September 2013
quotequote all
Be sure that the shaft hasn't gone.

Think Stevejasp had the same thing with his. Looked like a CV but turned out to be a driveshaft.

They are inherently weak on the Cerb. The CV joint used by hundreds of thousands of cars with a very low failure rate.

Tanguero

4,535 posts

225 months

Monday 23rd September 2013
quotequote all
As ridds says!

Generally you can only wobble the CV enough to make the bearings fall out if the driveshaft has snapped, unless you have taken it all apart and removed the shaft from the CV joint. It usually snaps right at the end where the groove for the circlip is, so it snaps off flush with the CV joint.

steviejasp

1,646 posts

189 months

Tuesday 24th September 2013
quotequote all
Andy at APM told me he had never seen a broken CV joint on a Cerb, it is always the shaft!!
That said, I have a new GKN cv joint and boot for sale!!

ian1986

Original Poster:

11 posts

152 months

Tuesday 24th September 2013
quotequote all
I took the shaft out today and still don't fully understand what has happened. Shaft is fine and the inboard cv is in peices. The bit the cv bolts to that goes in the diff had pulled out a bit so in thinking this could have forced the outer bearing race off of the inner in the cv. I took the bit out of the diff and the spring retainer is still present so pushed it back in and it is now looked in place. So whether someone has done something with it previously and not seated it correctly i don't know. But will be changing both cv joints as i have it apart.

Supateg

799 posts

166 months

Tuesday 24th September 2013
quotequote all
Are you saying the M10 cap head bolts (six of them) were loose?

ian1986

Original Poster:

11 posts

152 months

Tuesday 24th September 2013
quotequote all
No they were all tight. The part that goes into the diff that the cv bolts too had slipped out of the diff about 2 inches. I was surprised to see that the spring clip that hold it in the diff was still there. I checked the splines out then refitted it and it seems to be held i nice and tight. I will try and upload a picture when i figure out how to.

Tanguero

4,535 posts

225 months

Tuesday 24th September 2013
quotequote all
I hate to say it but it is the diff its self that has gone from what you describe. That output shaft would normally take a 10ft lever and heat just to loosen the locking ring.

I would get in touch with John at Readman Racing http://www.readmanracing.co.uk/ who has rebuilt more of these diffs than you can shake a stick at and ask his advice before doing much else. My experience is that hie is incredibly knowledgeable and helpful and won't talk you into a re-build unless you really need it.

ridds

8,366 posts

268 months

Tuesday 24th September 2013
quotequote all
Just sounds like the last person to have the output shaft out never put it back correctly.

esso

1,849 posts

241 months

Wednesday 25th September 2013
quotequote all
My onboard CV joint disintegrated and it was because the 10m/m bolts had come loose and several were missing when we checked it.

Supateg

799 posts

166 months

Wednesday 25th September 2013
quotequote all
Hope you used threadlock when you put it back together!
Correct torque listed above. Little bit of info - Too tight deforms the joint!