TCC releasing at crusing speeds with light throttle

[HellKnightHicks]

Zeroing tables eliminates Adaptive Shifting.

Dexron 6 atf.

peace
Hog

Redline D6 ATF

Opinions?

[HellKnightHicks]

Whats teh deal with TCC lockup during shift

Not real happy about having to redo my shift pressures... spent alot of time on them getting them where i wanted... better safe than sorry though.

[joecar]

I'm happy using M1 and Valvoline synthetics, but that is purely subjective.

[joecar]

WOT shifting with stock TCC applied typically damages the TCC.

Aftermarket multi-plate TCC's can handle this ok.

But, either way, unlocking during an upshift allows the torque converter to help the engine (allows engine RPM to stay up in the cam's torque range, and multiplies torque going into the trans).

[joecar]

Post screenshots of your shift pressure tables.

[HellKnightHicks]

The performance ones are what i used to have... the blue lines are the new values from the Stock Camero tune

[joecar]

You should use the blue ones.

[Taz]

+1 on Joecar's comments.

The high pressure settings were to assist with diagnosing the issue with the previous transmission rebuild, and could contribute to harsh shifts in a properly operating transmission.

[HellKnightHicks]

Nice ive returned those tables to stock...

Re worked my 3rd gear TCC using the spread sheet provided here on the forum... If you could have a look and see what you guys think.

97 Auto Shift.xls

Thanks.

I'll likeldy be picking up the tranny sometime next week.... hopefully be installing it by the weekend.

[joecar]

The basic rule is: the curves cannot cross.

i.e.:
- the shift curves (upshift and downshift collectively) cannot cross,
- the TCC curves (apply and release collectectively) cannot cross;

in the xls you posted, these do not follow the basic rule:
- the 4->3 downshift curve crosses under the 2->3 upshift curve,
- the 3->2 downshift curve crosses under the 1->2 upshift curve,
- the TCC 4th release curve crosses above the TCC 4th apply curve;

If you un-cross those your upshifts/downshifts and TCC apply/release will be more predictable.