I'm going to take the gearbox out after this summer, and try rebuilding it with new sync rings anyhow that seam not so expensive compared to the aftermarket price of a transmission 1500usd - 2000usd and that is not with shipping cost.
Then the car would have a new drivline from front to the rear after i have rebuild the transmission hopefully
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I'm buying Mobile gear oil to use this summer then.
Thank you all for the help