Mr Slob is going to tell you to get the UJs of your propshafts checked right away.
CharlesY
i understand that but do u rekon there is a reason why it only happens in 2nd and third gear at whatever speed and the low ratio box works fine
Are you saying it doesn't happen in 1st, 4th and 5th?
CharlesY
no it only happens in 3rd and 4th
So if you get it happening in say 3rd at 40 mph, and still at 40 mph change to 4th and drive on holding 40, does the noise/vibes stop or keep on?
You see where we're heading here?
Like .... inside the gearbox ....
But check those UJs FIRST no matter what.
CharlesY
it keeps on going any speed and i am pretty confident its gearbox but am living in hope its something else lol
AHA!
10 to 1 you say sorry to Mr Slob for disbelieving him!
The noise is probably being CREATED in the prop shaft(s) UJs, but being transmitted through the transmission which is where you hear it from. Your ears deceive you!
Park car on the level.
Put a brick at each wheel (behind the rears, ahead of the fronts) so the car can't roll over you.
Put a big carpet under the car and side under with a torch. Safety specs stop the crap from dropping in your eyes. There are FOUR UJs, and check them all.
Working close to the UJs, push and pull the shaft UP AND DOWN and then SIDEWAYS.
There should be NO perceptible movement between the two Yokes. If you try to tun one half the otyher MUST move without ANY free paly. If there is any movement, the UJ is knakkkkkered. No fix is possible - too late for grease - fit a new UJ kit. Haddocks job.
And check all four of them.
I bet you find one of them is moving HEAPS.
Greasing once in a while makes them last almost for ever.
CharlesY
The UJ kits cost a fiver each if you know where to get them, and might take a couple of hours to fit one.
If you intend to do it yourself, my STRONGEST POSSIBLE ADVICE is to find someone who has already done a few, and watch him do it.
Have you told Slob "Sorry" yet ! ?
He was right all along.
But you did good to find it quickly.
CharlesY