here is the post
This year I have put a lot of bucks into my 1st Gen. The biggest was a new Tranny & TC and a rear end rebuild.
I upgraded the tranny / TC to a heavy duty one only because I wanted the extended 3-yr. warranty. What I didn't know was how much it will cost me over the years in added fuel cost.
It seems the heavy duty setup uses a lockup TC (unlike the stock setup). This has dropped my mpg from 22 city/26 hwy to barely 18 city and only 20 hwy. For me this is totally unacceptable as I drive this thing A LOT!
So in talking with the dealer yesterday and he assured me that there was no possible way they could have changed the gearing in the diff as it would have involved a different pumpkin...ok then what caused my mpg drop I asked. That's when he told me about the difference between a lockup and non-lockup TC. He said told me that when I had the tranny changed out the with a heavy duty one instead of Stock that they probably put in a Lockup TC.
Ok...now I need to figure out a different way to get that back.
So I think the easiest place to start would be to install a 4" exhaust system.
Maybe after that a set of 40hp injectors?
I hate removing a perfectly good exhaust system though...and the injectors are ORIGINAL.
oct 13 2012