Diff clunk
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Discussion

gsd2000

Original Poster:

11,515 posts

214 months

Sunday 7th March 2010
quotequote all
Is a clunky diff when pulling away sometimes caused by the play in the drivetrain?

The rear end is polybushed so i was thinking, in theory if i fitted a poly gearbox mount and poly engine mounts or an ingalls stiffy damper, would this reduce/eliminate the clunk as it would reduce/eliminate excessive play in the drivetrain?

I am aware that poly engine and gearbox mount will increase vibration which is why i was thinking of a torque damper instead of engine mounts.

I am also going to change the diff oil to see if that helps.

ferb

3,112 posts

241 months

Sunday 7th March 2010
quotequote all
gsd2000 said:
Is a clunky diff when pulling away sometimes caused by the play in the drivetrain?

The rear end is polybushed so i was thinking, in theory if i fitted a poly gearbox mount and poly engine mounts or an ingalls stiffy damper, would this reduce/eliminate the clunk as it would reduce/eliminate excessive play in the drivetrain?

I am aware that poly engine and gearbox mount will increase vibration which is why i was thinking of a torque damper instead of engine mounts.

I am also going to change the diff oil to see if that helps.

Probaly diff oil and slippery stuff.
I think the extra noise's are because of the coilovers and bushes making it more solid so you hear and feel everything a lot more.

gsd2000

Original Poster:

11,515 posts

214 months

Sunday 7th March 2010
quotequote all
thats what i was thinking with the oil, which i why i plan to change it before thunder road smile

I just thought if i stiffened the engine and box up would the general clunkynuss be reduced. scratchchin

The diff doesn't clunk alot just sometimes when i pull away from standstill and sometimes changing into second at a slow speed.

SimonV8ster

13,029 posts

259 months

Sunday 7th March 2010
quotequote all
Not just a top up of friction modifier required ?

I had the odd clunk and it started to get worse so I got it topped up and it was fine after that.

ringram

14,702 posts

279 months

Sunday 7th March 2010
quotequote all
In my old gts the source of play/clunk was 80% due to half shaft cv joints. You can check that easy enough.
I got a replacement set from oz.

monkfish1

12,504 posts

255 months

Monday 8th March 2010
quotequote all
gsd2000 said:
Is a clunky diff when pulling away sometimes caused by the play in the drivetrain?

The rear end is polybushed so i was thinking, in theory if i fitted a poly gearbox mount and poly engine mounts or an ingalls stiffy damper, would this reduce/eliminate the clunk as it would reduce/eliminate excessive play in the drivetrain?

I am aware that poly engine and gearbox mount will increase vibration which is why i was thinking of a torque damper instead of engine mounts.

I am also going to change the diff oil to see if that helps.


you have the additional shims in your rear subframe dont you? If so, this is why. What you are hearing is normal mechanical noise. You just couldn't hear it before. Changing the engine mounts will make it worse, not better.

gsd2000

Original Poster:

11,515 posts

214 months

Monday 8th March 2010
quotequote all
Thanks for that roger, yeah i do have the extra shims. It was just a thought about the engine mounts