Is it possible to drive from India to Thailand in own car?

You need special permits to cross from India or China to Myanmar; as the border is not open for free travel.

The crossing point in India is at Moreh (image from NY Times):

It is not possible to cross into Myanmar from Bangladesh (there are no borders).

You need to obtain a visa in advance to cross into Myanmar. You can get this at the Myanmar embassy in Delhi or the consulate in Kolkata.

You will also need a MTT permit, which is only issued by Myanmar travel/tourism companies and is required at the border. Contact Seven Diamonds Travel for the details and requirements.

Keep in mind you need additional permits for your specific vehicle. You will at minimum need to arrange temporary import permits for the countries you will be transiting through; and then a permanent import permit for Thailand (assuming you plan on selling the vehicle there).

Currently it seems to be impossible to enter Thailand by camping car (RV) - which your truck seems to be if it is not considered transporting goods or seeing imported as special machinery.

Overland (vehicle) Travel into Thailand seems to be impossible currently (Fall 2016). To me it seems the people at seabridge put enormous resources into this and negotiationg directly with the Thai government but fail so far.

I personally took 3 cars so far from the U.K. to Thailand. There are ways! However, you can not leave the vehicle in Thailand longer than max. 3 month in a role. I had to cross borders every 30 days, as you will only get a 30 days permit for the vehicle. I mostly drove to Cambodia and back over a weekend. BUT attention: The car will be linked to your passport!!! This means you are responsible for the import-duties, in case the car vanishes somehow. Import-fees are depending on the engine size (ccm) and can be up to 400% of the list-price of the car. - So, you better make sure you take the vehicle out of the country again. Also crossing land borders are possible, if you have the right papers.

By the way: I am planning to drive from Germany to Thailand with my overland 4x4 2019 or 2020. There is the new India-Thailand highway through Myanmar ready. Unfortunately I was not allowed in from Thailand coming. But I heard entering from India is under restrictions already possible. Hope that Myanmar will allow free passage until next year. -Fingers crossed!!