your thoughts on this shift kit, from
personal experience.
thumbs up or down???

 

I think its good but there are better ones out there

 

Definitely better than the Trans-Go.

Frank

 

There is a difference between the B&M "shift improver" and "trans-pak" kits though, right? AFAIK, the "shift improver" is just a different plate with larger holes for some of the passage ways, and probably a new pan gasket? I got the "trans-pak" for mine, which also has new springs and bushings for the accumulator and other parts (sorry I don't know the specifics on this stuff!) but I know that the trans-pak was more money than the shift improver kit, so I figured it was a more thorough kit?

 

I would imagine your referring to the one for the 4L60E. This connects to the pcm under the firewall. I am going to change the fluid in the spring and pan gasket.If this restores the shift i had when i did this 40 K ago i won,t need this part anymore! Btw it has 2 stages on it. I also had one in a turbo 350 TRANS.(stage 2) but it shifted too hard for my liking and i put a stage 1(trans-go) and i like it much better.

 

I don't know much about the shift kits like this B&M you guy's mentioned that hook up to the PCM but I would think other than shift timing {in which effective adjustment is limited in the PCM programming}, they use hydrualic 'pressure' more than anything to firm-up the shifts. That may be OK to an extent, but the factory pressure settings are capable of supporting very firm shifts without over-pressurizing the hydraulic circuit and all the seals that are designed to hold that pressure at factory apply pressures. Shift firmness is regulated by accumulator spring tension and valve timing from the factory, not by pressure adjustment via PCM {I made several changes in my PCM via LT1_Edit, but changed nothing with pressure}.
Sure the pressure can be increased some over factory specs, but usually in order to get more hold with the apply pistons on the clutch packs, and to keep from cavitating the circuit as a result of 'fast' shift timing for a high performance valve timing configurations.
The key to quick, firm shifts that will let the hydraulic system live and not overstress the pump and seals is in the hard parts of that circuit.
There are many many hard parts available that can be used to dial-in just about any degree of performance shift feel that you could need.
Frank, I don't dissagree with you about TransGo not being the way to go, and I assume you are refering to the shift kits readily available to the public for a ridiculous cost. But I found a TransGo shift correction kit that is so much better than any shift reprogramming kit of any type I have ever used, and, as you know I've posted the part # ect. before.
TransGo # SK 4L60E Shift improvement / correction kit 93-2004 Code: T74165E
Price: $38.95
Although this kit contains some parts that will require a bit more mechanical skill to install than the mass produced and sold reprogramming kit's, it is very do-able by less than a professional builder, and addresses much more in the area of shift timing than the much more expensive standard kits. And I am a firm believer that an automatic tranny will tear itself up in a short time if it is allowed to shift in a fashoin that applys forces of one section against another.
Of course all this is just my opinion.