TheSamba.com :: View topic - Noise comes and goes at top speeds, tranny?

Tue Oct 20, 2009 8:36 pm

Hey my 71 super is making a humming type loud vibration at top speed but goes away as I accelerate, but gets real loud if I put her in neutral at around 50mph. checked trans fluid level: ok, hardly any play in cv's(although on side had more action than the other?) any ideas??

Tue Oct 20, 2009 9:02 pm

Well I'm driving(gassin) at 55mph and I let off the gas and I hear and feel a loud vibrating hollow thud........ until I give it more gas and goes away, but if I put in neutral at 55 that noise is back and louder

Tue Oct 20, 2009 9:17 pm

Zupercar wrote: a loud vibrating hollow thud........

does it just happen a 55 mph? long shot guess, glandnut not torqued correctly and the flywheel is coming loose and hitting the bell housing. happened to me.

Tue Oct 20, 2009 9:23 pm

By 55mph, I mean in 4th gear going 45-60 mph.
It doesn't make this noise at lower speeds. thx for reply, I did not install this flywheel,po did.

Wed Oct 21, 2009 1:24 am

Do you feel it too (in the motion of the car) or just hear it?

Wed Oct 21, 2009 4:22 am

Check for a rear hub with play(rock back and forth) where it fits on the axle splines,a result of axle nut not tight enuf and if loose have to get another hub.

Wed Oct 21, 2009 5:34 am

Also check the front trans mount. The hollow thud could be the front of the trans flopping around.

Wed Oct 21, 2009 10:06 am

Coasting at high speed is the loudest.
Its speed related
I'll check hubs and trans mounts
Thanks
I will take a drive to see if I can come up with any more details

Fri Oct 23, 2009 7:16 pm

ok , so there is play in hub and the axel spline.
It's vertical play (12&6 oclock) not horizontal, is this normal?

Sun Oct 25, 2009 5:36 pm

Anybody??????????

Sun Oct 25, 2009 9:37 pm

mine had exactly the same symptoms you describe. the left rear axle nut was not fully tight. i removed the cotter pin and tightened the nut per the bentley manual. no more noise or play. while i was at it, i did the right one too. it was about as tight as the left one, but no play at the axle. weird.

Sun Oct 25, 2009 10:34 pm

Yeh, the axel play has me worried,
Isn't the axel bolted in?

Sun Oct 25, 2009 10:39 pm

Zupercar wrote: Yeh, the axel play has me worried,
Isn't the axel bolted in?

are you talking about the axle going from the transmission to the stub axle with the cv joints on both end? or you talk about the brake drum being loose on the stub axle?

Mon Oct 26, 2009 1:33 pm

The end of the axel with spline and threads moves up and down

Mon Oct 26, 2009 3:32 pm

the center nut on the drum holds the splinde in tight if torqued down correctly. if the nut is torqued correctly and you still have movement then the bearings inside are bad. if it is not torqued correctly then you should look at the bearing and also the splines on the drum and stub axle for wear.

Wed Nov 18, 2009 8:24 pm

i am having the same issue i think!! it makes a loud noise when i am driving and i push the clutch in any gear or in N it making a loud thud sound like (thud, thud, thud) the faster i go the fast it gets and the slower i get the louder and slower it goes. and the axle slides left to right from the tranny to the hub/wheel. but when i pull on the wheel it solid no movement. please help me find out whats wrong!!!! :roll:

Thanks you and god bless

Wed Nov 18, 2009 8:24 pm

i am having the same issue i think!! it makes a loud noise when i am driving and i push the clutch in any gear or in N it making a loud thud sound like (thud, thud, thud) the faster i go the fast it gets and the slower i get the louder and slower it goes. and the axle slides left to right from the tranny to the hub/wheel. but when i pull on the wheel it solid no movement. please help me find out whats wrong!!!! :roll:

Thanks you and god bless

Wed Nov 18, 2009 9:04 pm

cubanjoe wrote: i am having the same issue i think!! it makes a loud noise when i am driving and i push the clutch in any gear or in N it making a loud thud sound like (thud, thud, thud) the faster i go the fast it gets and the slower i get the louder and slower it goes. and the axle slides left to right from the tranny to the hub/wheel. but when i pull on the wheel it solid no movement. please help me find out whats wrong!!!! :roll:

Thanks you and god bless

did you check the wheel/stub axle for being tight with the wheel off the ground? if it still is tight then it could be a CV joint or stub axle bearing going bad.

Tue Nov 24, 2009 4:49 pm

so it ended up being the seal was bad and the bearing didnt have much grease so i replaced the seal packed it all up with fresh grease it drives great. thank you for all your help.