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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22898
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Hi, I have a jaguar s type 3.0 v6 the other day i tried to

Customer Question

Hi, I have a jaguar s type 3.0 v6 the other day i tried to start it and the battery was flat,i started it with jump leads,when i drove it up the road the gearbox was making a noise so i put it back on my drive. the car starts ok now but when i engage reverse or forward it makes a noise but wont drive could you please advise,there is no messages on the dashboard that there is a problem ?
Submitted: 3 years ago.
Category: Car
Expert:  Matt replied 3 years ago.

I'd take a look at the colour of the transmission oil it should be a dark red colour if its black then its needs changing together with its oil filter. Also check its level with the gearbox warm and just after you've moved the selector through all the positions leaving it for a few seconds in each one and then back to park.

You can top up the box through the side fill plug if required and make sure you use the correct oil for your car as the fluids are not all the same. Some manufacturers recommended a change of the type of fluid - Speak to the local dealer and parts dept - they will advise you on the updated fluid to use..

If that’s all OK then check all the electrical connections of the gearbox, remove each connector in turn and spray with contact cleaner. Check that the wiring to the gearbox is in good condition with no chafing or frayed wire

If this is OK then check the selector lever linkage / cable under the car for any broken parts and or missing bolts as if this is coming adrift then it can rub on the car body or just bind up

Then - you should top up if low and re try it - or, if its level is ok - and condition is ok - then the next step is to drain it off - open it up and clean the filters inside -- refill and retry it..
Customer: replied 3 years ago.

Hi Matt, i have a record that the fluid and filter was changed less than 12 months ago the car has only done 5000 miles from then, could it be a sensor or something electrical as i read that if the battery was flat or low it could affect the gearbox.?

Expert:  Matt replied 3 years ago.
Hello Anthony

Ok a low battery can effect all sorts of things and yes it could be the problem
you can confirm this by measuring battery voltage with the engine off the voltage should be at least 12V