which transmission do I have? [Archive] - GrandAmGT.com Forum


View Full Version : which transmission do I have?

06-09-2009, 03:15 AM
I was going to do a filter, and fluid change. I called autozone to see if they had the parts in stock, and the guy started asking if I had the 4t40e, or 4t45e? How do I know which one I have? Does it even make a difference?

06-09-2009, 06:58 AM
You have the 4T45E. All GT's came with the 45E, and there should be a MN5 somewhere on the RPO code sticker under your spare tire cover to verify... but no I don't think it really matters much since they are almost exactly the same transmission except for the final drive ratio and a few other small internal differences. They use the same outer case and take the same amount of fluid and I think they use the same filter too.

06-09-2009, 02:06 PM
What Aaron said.

06-09-2009, 03:35 PM

06-09-2009, 03:48 PM
Ok thanks alot guys. I don't know why the guy at autozone asked me this then. I told him it was a gt.

06-09-2009, 03:49 PM
Unfortunately many people that work at parts stores know little about cars. They only know what the screen infront of them says...

And even at that he could have simply looked at the part # for both to see if they were different which means he probably knows very little about the screen infront of him as well :(