Start with the simple stuff: is the exhaust system fully supported?
Harder stuff: check for ...
* loose rear suspension components (unlikely)
* prop shaft U-joint wear (also unlikely)
* rear transmission support blocks
Without hearing the sound it's kind of hard to give you a good answer but I would start by changing the rear axle fluid and making sure that the axle bearings are not loose you can do this by jacking the wheel up off the ground slightly putting a bar under the wheel pulling up-and-down see if there's any play if there is the bearings are badd. That's a good place to start after that it might be a good idea to take it into a shop and have them run the car with the wheels off the ground see if they notice any strange sounds
SOURCE: selespeed gearbox fault
Hi, it might be worth getting your gear selector checked as these have a nylon/plastic ball at the bottom now if this has worn down then when you try selecting a gear it will cause the problem your having.(its under neath the gearstick before it links to the two selector rods so check this.)
Also worth checking alot of cars where the two rods come from the selector and then their is two rods going to the gear box one of these is fixed and cant be adjusted but the other rod can be adjusted and its often the case that this adjustment can take up the play and solve your problem.
The problem with this is that it can be adjusted forwards and backwards it slides when you undo the bolt that goes through it so make sure you can mark exactly where the selector is where you can adjust it so that you can set it back their if it makes it worse or no differance.
If yours can be adjusted then make sure you mark where it is now then just move it a small bit at a time one way and then give it a try if no differance then move it a bit more if it gets worse then put it back where it was originally then try going the other way see if it makes any differance if not then it wont be adjustment problem.
If neither of these are problem then the chances are the gears have stripped and this would give you the problem your having as the faster you go the harder it is for the teeth to locate on the correct gear in the box.
As for stripping the box it isnt really worth doing as the parts would be expensive and would cost as much as a second hand gear box.
The best option would be a reconditioned gear box as you know that it has be rebuilt with any new parts needed and you should also get some warranty on it which is always a bonus.
Are you sure the clutch is ok test this by having the car running and at a standstill with the hand brake on put car into 2nd gear and with the handbrake on gently let the clutch up slowly and see if it feels like its slipping if the clutch is ok then the car will stall this is what will happen if the clutch is ok.
Let me know how you get on or if you have any problems or questions and ill assist you the best i can ok.
SOURCE: Audi A4 Quattro (2004) bumping/knocking from manual transmission
HI,IT SOUNDS TO ME LIKE THE TORSION DIFFERENTIAL ON THE GEARBOX IS CAUSING THIS,PLEASE TRY THIS,DRIVE THE VEHICLE TO A OPEN AREA,YOU MUST PUT IT IN 2ND GEAR AND DRIVE IN A CIRCLE ONE WAY ABOUT 10-15 TIMES,AND THE SAME THING CHANGING DIRECTION,THE REASON I SAY THIS IS TO LOOSEN UP THE TORSION GEARS,PLEASE LET ME KNOW,ANDY.
SOURCE: 95 gran marchis trany; shifting
The transmission needs to have the filter and fluid replaced.
SOURCE: my 2002 Hyundai Accent goes into 1 gear smoothly,
CHECK ENGINE light??? Whenever the 'CHECK ENGINE' (Service Engine Soon) light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on.
You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE the problem and perhaps eventually fix the problem.
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