Hi I'd like to upgrade the shifting of my 93 corvette automatic with a shift kit. What's the best way to go, I've bought them before for other cars and not noticed that much improvement[B&M shift plate was one bad one]. Also because it's a 4L60E is there any thing you have to watch out for compared to older transmissions? Thanks Tim

 

The electronic controls were not added until the '94 model.The '93 was called the 4L60 and was basically the same tranny that I think was called the R700.
Keep waving,Ray

 

i installed the b&m one
it didnt impress me at all

 

Transgo is the best for your 4L60 (not E) it is basically a 700R4 with an extra sensor.

 

NO

Stay as far away as possible from TransGo. It just does not mix at all with a 93 Vette trans. I've got the spare ruined case, valve body, and other things to prove it. Thankfully Pete K didn't rape me on the labor.

 

Worked just fine in mine. At light throttle it shifted like stock but would brake them lose in 2nd at WOT. I suspect the tranny guy you used was the problem. With a Transgo you can make it as mild or wild as you like and it takes some skill to install.All a 93 tranny is is a 700r4.I would be interested in what Pete has to say on this. I believe he put a Transgo in his car.

 

There is a TransCo and a TransGo. Are you sure you have the correct one?

Trans-Go has always made decent shift kits. As far as I know anyway. Maybe they screwed up on the 4L60. Which is basically a turbo 350 with a lock-up converter.

There are several ways a shift kit improves shifting. They all divert pressure to the clutch packs for more holding pressure instead of sending fluid to an accumulator. It's tough to say what could have ruined your case without seeing it. A shift kit gives you a few options on how quick of shift time you want. Different spool springs and size holes drilled in the valve body separator plate. About the only thing I know of that will hurt the case is excessive pump pressure and that would require getting at the bypass spring in the front pump. People used to add washers behind the bypass spring to crank up the pressure for more holding pressure. We now know that can wear the case and isn't the best option. Higher pressure is good up to a point. Short shift time....you can build a log splitter out of an automatic transmission. In other words, if you get too carried away with the shift timing or making it shift so hard, there is no slippage at all and it just snaps the drive shaft. It's possible. You can divert all the fluid from the accumulators by plugging holes in the valve body. It's really hard to say what the shift kit was trying to do. I'm not saying it didn't ruin your case. I'm just trying to figure out how.

The newer 4L60E uses servo's as accumulators and I don't understand all there is to know about them. I've read and seen that "some" of the servo pistons are made from plastic and are prone to cracking. The reaction shell has a very sharp bend in a critical splined area and is prone to cracking. The aftermarket makes a nice heavy duty reaction drum. The valve body plates were very soft and the check ***** wore though them. Again, the aftermarket sells a hardened valve body plate. Another strange problem the 4L60E has, a spool in the valve body tends to oscillate and wear the valve body causing excessive leakage around the spool valve. The shift kits include an oversized spool to correct a worn valve body.

 

The transgo does not like the unique, 93 model year.

I have mixed thoughts on the transgo 700-2&3 kit. Most of it I like, some I do not.