AUTO shift kit?
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
I've never been a big believer in the really harsh shift kits. If done wrong they can lock the clutch or band for the next gear before the previous one has released - can't be good on the transmission to momentarily be in 2 gears at the same time.
One spot that can help is making sure the clutch packs and bands are at the low side of their tolerances so that less fluid has to move to engage the gear. Basically, paying attention to the build.
Peter
One spot that can help is making sure the clutch packs and bands are at the low side of their tolerances so that less fluid has to move to engage the gear. Basically, paying attention to the build.
Peter
Safety Car
Joined: May 2008
Posts: 4,237
Likes: 11
From: Lacombe Louisiana
"Slamming" only breaks parts and looses traction.The old mech shift kits only raised main line pressure and changed shift points and quickened shifts.This can all be done with a tune on a modern electronically controlled trans.
Racer
Joined: Aug 2009
Posts: 388
Likes: 0
Yep.
Let's say you're stopped in a parking lot. Veryyyyyyyyyyyyyyyyy light throttle. As soon as you hit the shift point, it will SLAM into 2nd.
Parking lots were not fun for that reason - i would be leaving like 2ft of rubber behind every time it would up or downshift (e.g., coming to speedbumps, etc..), and it only got funner when you really got on it
Let's say you're stopped in a parking lot. Veryyyyyyyyyyyyyyyyy light throttle. As soon as you hit the shift point, it will SLAM into 2nd.
Parking lots were not fun for that reason - i would be leaving like 2ft of rubber behind every time it would up or downshift (e.g., coming to speedbumps, etc..), and it only got funner when you really got on it
Team Owner
Joined: Nov 2001
Posts: 45,000
Likes: 586
There is a piston with a spring behind it that absorbs the rate of fluid a bit to allow the shift to be softer. In the full on performance kit, that spring is replaced with a metal rod. There is NO cushion. BANG, next gear.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
No comment about torque management (I thought that was only in C6s?), but unless you've driven a full out shift kit you can't begin to compare. When it slams into gear it SLAMS into gear. There's NO programming that will mimic that. It will harden the shifts, yes, but there's a big difference between shifts being hardened and SLAMMING into every gear.
And you think C5's with auto trans don't have TM ????
Like I tried to suggest earlier - there's no need to guess here on CF. There's too many here that have "been there - done that"... and can give exacts and specifics.
Race Director
Joined: Jul 2007
Posts: 18,681
Likes: 47
From: Reno is so close to Hell you can see Sparks , State Of Confusion
St. Jude Donor '12-'13-'14
Yep.
Let's say you're stopped in a parking lot. Veryyyyyyyyyyyyyyyyy light throttle. As soon as you hit the shift point, it will SLAM into 2nd.
Parking lots were not fun for that reason - i would be leaving like 2ft of rubber behind every time it would up or downshift (e.g., coming to speedbumps, etc..), and it only got funner when you really got on it
Let's say you're stopped in a parking lot. Veryyyyyyyyyyyyyyyyy light throttle. As soon as you hit the shift point, it will SLAM into 2nd.
Parking lots were not fun for that reason - i would be leaving like 2ft of rubber behind every time it would up or downshift (e.g., coming to speedbumps, etc..), and it only got funner when you really got on it
Instructor
Joined: Feb 2005
Posts: 151
Likes: 140
I had a dyno tune on my 2001 auto the shift pressures were increased, and the only time my transmission shifts firmer is at low rpms. At WOT the 1-2nd shift feels much softer than stock. 
I am considering a shift kit.
I am considering a shift kit.
