My 300SD transmission would frequently flare and not want to go into high gear. The fix was to crank a turn on the pressure adjuster and it then worked fine for 3-4 weeks.
I now have the engine out for a rebuild and am willing to give the transmission a go if the fix isn't too difficult? Is this a simple fix or way too complex for an amateur?

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'76 240D-Sold
'78 240D-Sold
'85 300 SD, 165K-Sold
'88 300 TE, 165K-Sold
'64 Porsche 356C Cabriolet- under restoration
'86 560SL 124K Miles-Sold
'94 320E Wagon, 74K Miles-128K Miles JUNKED
'06 E350 Wagon, 84K Miles
07 SL550, 14K Miles