Pelican Parts Forums

Pelican Parts Forums (http://forums.pelicanparts.com/)
-   Porsche 911 Technical Forum (http://forums.pelicanparts.com/porsche-911-technical-forum/)
-   -   Gearbox noise. (http://forums.pelicanparts.com/porsche-911-technical-forum/660396-gearbox-noise.html)

911scdave 02-23-2012 10:59 AM

Gearbox noise.
 
Got my 915. 83 SC gearbox back from the repairers last week after him repairing all the faults he had found.
2nd synchro had broken up and had done a lot of damage.
The repairer had asked me to sorce the parts for him to fit.
Shift Sleeve (new)
Synchro Hub (new)
1st to 5th Synchro's (new)
Input shaft bearing (new)
2nd gear gear set marked matched pair (used but perfect condition)
3rd gear gear set marked matched pair (used but perfect condition)
Gasket set (new)
Swepco oil (new).
Fitted back engine and box back into car, but before taking car out for a test drive i had her up on axle stands, started her up and put her through all the gears.
In all the gears there is a knocking noise and knocking noise increases as you go up through the box.
The repairer has over 30 years experience in this trade and came highly recomended, i phoned him to tell him the problem and he said everything was fine when he assembled it back and that all the parts i had supplied were correct. he's not being very helpfull now i,ve paid him.
Does anyone have any idears what the noise could be and point me in the right direction of what to check.
Many thanks. Dave.

Porchcar guy 02-23-2012 11:26 AM

Take it back to him and let him hear it ! Before doing that though, you should take it for a short drive to see if the noise happens while the car is under a load.

callard 02-23-2012 02:24 PM

Bad CV joint in droop?

dshepp806 02-23-2012 02:34 PM

on the ground,..go.....! Now, what?

Doyle

Flat Six 02-23-2012 03:41 PM

Quote:

Originally Posted by callard (Post 6578013)
Bad CV joint in droop?

+1 -- good call . . .

911scdave 02-24-2012 12:28 PM

Have done as you guys suggested today, dropped the car down and ran her for a few hundred meters up and down the road, the knocking noise sounded bad and was concerned that i was causing more trouble, got her back up on axle stands and removed the the CV's and the knocking noise is still there with them removed, one thing i hadn't tried up till this afternoon is to run her in reverse gear but it is knocking in that gear aswell.

dshepp806 02-24-2012 01:12 PM

The source of the knocking is "where"? CVs?

Best,

Doyle

DRACO A5OG 02-24-2012 06:02 PM

Check the coupler, adjust/reset it. Mine was set a little off after I installed the Gate Shift Kit. Reset and all is well. While driving I had a bit of knocking but when I moved the stick a bit it went away.

Jim

yelcab1 02-24-2012 06:10 PM

He did something wrong. Take it back.

Evans, Marv 02-24-2012 08:47 PM

+100. Take it back & don't drive it, trailer it.

jrolstin 02-24-2012 09:37 PM

I agree with Marv and yelcab 100%... Sorry :(

Bob Kontak 02-24-2012 11:46 PM

I agree as well.

Did you put the transmission back in the car yourself? You may have to trailer it and have him agree that it is inside the box then he ought to pull the engine and re-install for you.

He will not want to and he will have every excuse not to. You need to determine a game plan before picking up the phone.

j911brick 02-25-2012 02:51 AM

is it knocking while its out of gear, or only when a gear is selected?


All times are GMT -8. The time now is 09:51 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website


DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.