1997 Formula: Which Tranny and which shift kit?

**Zapper2003** · 11-04-2007, 08:04 AM

I'm unsure of which transmission I actually have, its a 1997 Formy LT1 with the A4 trans. Which one is it? the 4l60e? Also, I'm looking on B&M's website and I see there's a Shift Improver kit as well as a Transpak kit (stages 1 and 2). Both are listed as compatible with the 4l60E tranny, and if i were to get one, which would be best? I'm looking for hard shifts, being able to 'shift' my automatic, and 2nd gear tire chirping. If the transpak is what I want vs. the shift improver, do I want to go with stage 2?

**Zapper2003** · 11-05-2007, 01:41 PM

Help?

**performabuilt** · 11-08-2007, 04:55 PM

You have a 4l60e and the shift improver would be what your looking for the transpak is way more involved

**Zapper2003** · 11-09-2007, 03:28 PM

Thanks for the reply...BUT...

I already ordered the Transpak. How much more involved is it? I think I remember reading somewhere about drilling something? I'm not going to tear down or anything until i read and understand the directions of course.

**performabuilt** · 11-09-2007, 08:09 PM

The transpak requires major tear down

**Zapper2003** · 11-10-2007, 01:27 PM

I read through the instructions today. There is definitely that, a lot of tear down. It doesn't seem to be that huge of a job, just a time consuming one that will require patience and carefulness.