6L80/90e's How they work

[The Alchemist]

while I've got you here GMPX how do you reduce the horrible torque spark retard function on each gear change with the A6? Is it in the PCm or TCM? pulls almost 20 deg.
Cheers,
Mike

[vetteboy2k]

while I've got you here GMPX how do you reduce the horrible torque spark retard function on each gear change with the A6? Is it in the PCm or TCM? pulls almost 20 deg.
Cheers,
Mike

TCM has those controls

[The Alchemist]

under what heading mate?

[XLR8NSS]

I got rid of all that spark retard on the upshift by turning off torque management. It's in the TCM and they make it very easy to turn off.

[joecar]

Click on the CLICK HERE>> link under Vehicle Owner, Do It Yourself, Professionals in the upper left;

then select GM Powertrain in the dropdown and click Submit;

then look for HM-6-Speed-RWD-TG in the next dropdown and click Search;

that gets you to here: http://www.helminc.com/helm/Result.a...LPKG2QEFQP640C

[MN C5]

Beautiful instructions for a guy with internet ADD like me. lol Hopefully they will get the documentation up soon.

Click on the CLICK HERE>> link under Vehicle Owner, Do It Yourself, Professionals in the upper left;

then select GM Powertrain in the dropdown and click Submit;

then look for HM-6-Speed-RWD-TG in the next dropdown and click Search;

that gets you to here: http://www.helminc.com/helm/Result.a...LPKG2QEFQP640C

[joecar]

Oh, I didn't pay attention enough to see that they are doing inventory... they should be back up in a few days.

[joecar]

These tech guides contain the "theory of operation" specifically for the 6L80 and 6T75.

They show in very great detail (using very good artwork) how all the internal hard-parts and clutches fit together and interact as the PCM shifts from gear to gear... they show how each component performs it's function, and how each component is electronically/hydraulically applied and released.

They show all the hydraulic passages, all the checkballs, all the solenoids and the valvetrains they control, all the other valves, the pump, the torque converter...

they are not repair manuals, they do not contain any repair information (other than some mild diagnostic information such as "if checkball X is missing then the xyz clutch will not apply")...

if you want to know extensively how these transmissions function, then these are the books
(if only the actual hard parts were painted the same colour... ...)

See the 4 speed RWD section of the forum for some examples from the 4L60E/4L80E tech guides.

Oh, I didn't get promoted... ...I demoted myself from "In Charge of Lost Bolts" (plural) to "Lost Bolt Moderator" (singular)...

Cheers,
Joe

[gmh308]

Thanks Joe,

Looks like an interesting book. Many pages?

So now you are dealing with bolts on a one by one basis right? Much simpler but the salary is lower!

Cheers.

These tech guides contain the "theory of operation" specifically for the 6L80 and 6T75.

They show in very great detail (using very good artwork) how all the internal hard-parts and clutches fit together and interact as the PCM shifts from gear to gear... they show how each component performs it's function, and how each component is electronically/hydraulically applied and released.

They show all the hydraulic passages, all the checkballs, all the solenoids and the valvetrains they control, all the other valves, the pump, the torque converter...

they are not repair manuals, they do not contain any repair information (other than some mild diagnostic information such as "if checkball X is missing then the xyz clutch will not apply")...

if you want to know extensively how these transmissions function, then these are the books
(if only the actual hard parts were painted the same colour... ...)

See the 4 speed RWD section of the forum for some examples from the 4L60E/4L80E tech guides.

Oh, I didn't get promoted... ...I demoted myself from "In Charge of Lost Bolts" (plural) to "Lost Bolt Moderator" (singular)...

Cheers,
Joe

[joecar]

lol...

bolts can be managed collectively in a single group, collectively in multiple groups (which are mutually exclusive), or singly (a special case of "collectively in multiple groups")... but lost bolts are lost (their state is "not present") so there is no thing (collective or single) to manage...