I recently (Nov. last year) had my clutch and 2nd gear synchronizer replaced in my '92 Integra GSR. I've been having problems getting into 1st and 2nd gears early in the mornings when it's cold.

I had the fluid checked at a second shop (not the one the did the initial work) and it's clear that the first shop used 90w oil instead of the recommended 30w. I took a sample of my oil to a local Acura and another shop, and it's clearly not 30w, but 90w.

I am concerned that this error has caused unexpected wear to my transmission. Without admitting guilt in this, the first shop has asked to flush and refill with off the shelf Honda fluid.

Whats a person to do when a shop makes a clear error, won't admit it (yet), and I as a layman can't determine if future repairs will be needed due to this neglegence?

I'm open to suggestions and your thoughts to extended damage.

Thanks...Randy