Lotus Elan

Driveline Creek

PostPost by: terryp » Wed Oct 31, 2018 8:23 am

Hello
Not on my Elan but on my Ginetta G4, it has Pre crossflow 1500cc engine + Elan Gearbox + Live axle (Austin A40)

Basically on inital takeup I get what can only be described as a creeky bed/ floorboard sound for 1 to 2 seconds. No other creeks or vibrations after this?
Initially I thought it could be the gearbox fouling the chassis, so I shimmed this below the mounting and its no better.
It has a late crossflow type clutch with the extender on the release bearing supplied from 105E speed.

Anyone any ideas?

Thanks
Terry
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PostPost by: elanfan1 » Wed Oct 31, 2018 9:18 am

Driveline Creek? - that?s in Arizona isn?t it? :D

I think I?ve experienced a similar sound on another car and it was the brakes binding before letting go. Does it feel as if the car is being held back a little.. if not then forget my suggestion your creak lies elsewhere (maybe Texas).
Steve

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PostPost by: terryp » Wed Oct 31, 2018 9:21 am

Steve
Thanks for the reply, it is that sort of noise, but no it doesn't feel its being held back.
Its driving me round the bend!
I know we are up sh*t creek but this is ridiculous. :-)
Terry
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PostPost by: EPA » Wed Oct 31, 2018 2:23 pm

What type of springs are you using?
My rear springs used to make a noise when setting off which was the coil over spring rattling against the damper tube. I fitted cable ties at points around the spring to prevent contact.
Ed
Last edited by EPA on Wed Oct 31, 2018 8:19 pm, edited 1 time in total.
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PostPost by: terryp » Wed Oct 31, 2018 2:32 pm

Ed, I do have coil overs, definately something to check
Thanks
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PostPost by: Mick6186 » Wed Oct 31, 2018 5:35 pm

Could it be a dry uj joint that binds when movement is slow but then frees up once it has momentum?
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PostPost by: terryp » Thu Nov 01, 2018 9:11 am

Thanks Mick , will check that as well at the weekend.

Cheers
Terry
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PostPost by: Bigbaldybloke » Fri Nov 02, 2018 5:27 pm

+1 for the prop shaft u/j?s
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PostPost by: terryp » Fri Nov 02, 2018 5:53 pm

The thing is the prop is new, but the gearbox does point upwards towards the back slightly, so it maybe binding.
Any ideas how I can stop this?
Cheers
Terry
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PostPost by: alan.barker » Sat Nov 03, 2018 8:11 am

Change ujs on prop an you can at least tick that off the list. Sometmes you cannot detect any play but when you dismantle you see they a shot
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PostPost by: terryp » Sat Nov 03, 2018 8:30 am

Alan
Its a new prop, ujs are brand new.
Terry
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PostPost by: alan.barker » Sat Nov 03, 2018 9:02 am

Are you sure the needle bearings in the ujs were fitted correctly. Sometimes during assembly they move and get damaged. Do you know how they were assembled. If assembled using a drift and Hammer the shock can make them move. It's best to assemble using a clamping action and no shocks :oops:
Sorry if i am telling you how to suck eggs :wink:
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PostPost by: alan.barker » Sat Nov 03, 2018 9:02 am

Are you sure the needle bearings in the ujs were fitted correctly. Sometimes during assembly they move and get damaged. Do you know how they were assembled. If assembled using a drift and Hammer the shock can make them move. It's best to assemble using a clamping action and no shocks :oops:
Sorry if i am telling you how to suck eggs :wink:
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PostPost by: terryp » Sat Nov 03, 2018 9:25 am

Assembled by the prop shaft company,but I will check for smooth operation.
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PostPost by: Bigbaldybloke » Sat Nov 03, 2018 9:50 am

Other things that can creek are metallastic bushes especially if they are failing. I remember my uncles TR4 suffered from this especially in dry weather. A quick squirt of WD40 worked wonders
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