Transmission Fluid

[tjpops]

My '92 is in midst of a transmission rebuild. When I asked the shop to ensure they used synthetic fluid, I was informed they don't believe in it and will only put in normal petroleum based product. This floored me! Am I missing something here? My impression from all you folks and various other sites is that this is the only way to go! The shop claims synthetics don't clear contaminants as well and allow the transmission to run hotter thereby damaging components. Even claims his fluid supplier, which carries synthetic product, does not recommend them! Also claims Subaru does not recommend them! Can anyone give me or point me to good, sound, technical material that can educate both me and the shop either way? I'm worried they won't warranty there work if I push for synthetic! Actually, some of you have probably been running synthetic for a long time - what's your experience? Thanks to you all for any help!

BTW - this new site is terrific! At last you can follow a thread!