Thought I would inject a comment in regard to my L83/8L90 swap. The 8L90 trans fluid, Dexron HP, is impossible to find locally at a reasonable cost and the local retail parts houses do not stock. Dealerships want about $17 a quart and considering I don't know how much I will need due to trans being drained before shipment I opted to purchase at the most reasonable online vendor I could find after hours of research. One Amsoil online dealer claims their ATF is an acceptable substitute but could not verify through Amsoil so I passed. The 8L90 seems to be very particular about its fluid so I'm using Mobil 1 LV ATF HP to play it safe as the dealerships, through part #19353429, use it exclusively. TheLubricantStore simply had the best price so I went with them. Swap going good and will be working out a few instrument light issues with Motech after trans is filled and road tested.
Last edited by WNbirdman; 04-16-2018 at 08:37 AM.