[97woodwarddream]

I have been looking through previous threads and i see that most people say to get a jmod. Which helps the transmission in some way, i am not sure how. Can someone please tell me what a jmod is and why it is helpful for a transmission. if it involves drilling larger holes, wouldn't that be bad for a trans?

[mbhmustang1998]

The jmod is a modification to the 4r70w valve body. THat being your automatic transmission. It involves removing certain springs and drilling bigger holes in the seperator plate allowing fluid to move more quickly making shifts faster and firmer. This reduces the heat that the stock settings create because of more friction due to the longer delay which makes the stock settings shift soft and slow. I had it done to my car along with an sct tune and tranny cooler and let me tell u it makes the auto a WHOLE lot more fun. Shifts as fast as a manual. I have beaten cars that should have taken me due to the fact they messed up shifting and my auto shifted hard and fast as the right time everytime! Highly recommend it.

[97woodwarddream]

How much does a Jmod Cost? How bout the trans cooler? And would i just go to a local trans shop to do this?

[Jakes]

You'll find a detailed tech article on the j mod here http://www.tccoa.com/articles/tranny/index.html#

You can also buy modified valve bodies in the aftermarket for installation in your tranny.

[GT02]

Definitely a world of info on auto trannys on that site. The only thing I didn't like was they used paper towels to wipe internal parts. They do say to make sure that any lint is removed. Easier said than done; I never do that. I use only a new small parts brush and Brakleen to clean and light air pressure to dry. Has worked to perfection for me.