Manual Q5 Gearbox /clutch conundrum

[Porkerholic]

Audi Q5 2009 MANUAL 6 gear 107,000 miles FSH. I have had this car for 12 years with no real problem however this one recently came up and i must admit even with my engineering background it has me beaten.

First thing in the morning start car, on the button as usual. Will absolutely NOT go into gear, none of them,,,,,,, Let idle for 3/4 of an hour and hey presto all gears work perfectly! and do so for as long as you want for the rest of the day!!

BUT park up for the night, come back in the morning.....same problem.....let idle for 3/4 hour, and off we go. Weird

I must admit it has been getting progressively worse over the last year I thought it was old oil so I got it changed,(seemed to be better in warmer weather). And that's it really, took it to a garage and they said new clutch, yea right.

I suspect it has something to do with servo/vacuum/clutch slave, works on the same system as brakes I believe, but no fluid leaks, any suggestions?

James

[cliffcoggin]

James.

Can we assume that with your engineering background you have done the obvious things like changing the clutch fluid on schedule, checked for free play in the pedal linkage, and ensured the servo is operating correctly? (I am surprised it is a vacuum servo rather than an electric one.)

[Stevey Y]

2 hours ago, Porkerholic said:

Audi Q5 2009 MANUAL 6 gear 107,000 miles FSH. I have had this car for 12 years with no real problem however this one recently came up and i must admit even with my engineering background it has me beaten.

First thing in the morning start car, on the button as usual. Will absolutely NOT go into gear, none of them,,,,,,, Let idle for 3/4 of an hour and hey presto all gears work perfectly! and do so for as long as you want for the rest of the day!!

BUT park up for the night, come back in the morning.....same problem.....let idle for 3/4 hour, and off we go. Weird

I must admit it has been getting progressively worse over the last year I thought it was old oil so I got it changed,(seemed to be better in warmer weather). And that's it really, took it to a garage and they said new clutch, yea right.

I suspect it has something to do with servo/vacuum/clutch slave, works on the same system as brakes I believe, but no fluid leaks, any suggestions?

James

Hi its air getting into the clutch system via either the master cylinder on the clutch or the slave cylinder on the gearbox, do you have any solid information on when the clutch was last changed, if not it probably needs a clutch as the slave cylinders are in the box and are famous for letting in air, my daughters Q3 did it back in the summer and I had put a new clutch in at about 40k before, she had the same problem at first no gears and that soon developed in to pedal loss, the gearbox was removed clutch checked and a new slave cylinder fitted with new top hat connectors that solved the problem.

Steve.