Volkswagen Sharan My car is Bucking like a mule, changing from 3rd-4th gear

2001 Volkswagen Sharan Problem

CarVolkswagen Sharan 2.8 v6 carat auto
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Hi Everyone,
I am looking for some serious help here.
I adore my Sharan, but at the moment I could quite easily put it in a compactor.
OK, It has been diagnosed now 4 times in 4 months, as the camshaft sensor position 2.
The camshaft sensor has been replaced.
The spark plugs have been replaced, the ignition coils have been replaced, you get the picture.
The problem is, when the car is cold she runs like a dream, after 15 minutes changing from 3rd to 4th gear on the automatic transmission, the rev counter shoots up to 4000-5000 revs and wont change gear. She Bucks her back end and feels like you are doing an emergency stop.Bonnet grinds down. The oil in the auto gearbox has not been changed. I have had at least 10 different suggestions from changing oil and filter in the gearbox, ABS sensor, New ECU unit, stripping the engine and gearbox down to see if a chain link is damaged.
The are no nasty noises, no nasty exhaust fumes, and when the faults are cleared she runs perfect for 15 minutes.Refaults as Camshaft sensor position 2
Please advise.
Many Thanks in advance
Problem Category
Engine, Cooling System & Drivetrain

Gearbox & Clutch

Electrics, ECU, Warnings & Lights

Steering, Suspension, Brakes, Wheels & Tyres

Running Rough, Starting & Power Loss

Solution 1
rizzo | Driver | Since: Nov 2009 | Posts: 2 | Fixes: 386 | View Garage
Suggested Solution

By what you describe the gearbox is not changing gear as it should between 3rd 4th, reving out would indicate a fault in the gearbox if the oil has not yet been changed i would suggest changing it, however if it was an oil issue you generally get faults in other gears aswel but its worth a try.
as regards the camshaft sensor has the cambelt/chain been checked as a slack belt chain will cause timing issues and could flag up faults in this area.

Posted on Thursday 22nd of December 2011
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Solution 2
whittingehame | Legend | Since: Oct 2009 | Posts: 444 | Fixes: 11619 | View Garage
Suggested Solution

Has the car been checked by VW garage using Vag-Com ? Could check wiring to camshaft sensor .Depends on mileage of car and colour / codition of ATF whether it would be worth changing it and filter .

Posted on Thursday 22nd of December 2011
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