tranny serviced [Archive] - LS1 Performance Information

maroca

01-23-2008, 03:43 PM

I had some slipping problems when i would drive it would slip a little when it was supposed to shift so when i was on the freeway doing 60mph the rpms would be at like 35-4000rpms i got it flushed and put some lucas in it and its better it still slips a little when it shifts though any suggestion only 60k mi on the car no major mods

xtremetrans

01-23-2008, 09:48 PM

Sounds like your 3-4 frictions(clutches) are slipping.

performabuilt

01-24-2008, 08:16 PM

May be the 3-4 clutch failing but how does the wot 1-2 shift compare to PT shifts

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maroca

01-26-2008, 01:11 AM

it shifts a little better a wot but never shifts in to 4th

performabuilt

01-26-2008, 10:26 AM

Shift to 4th are disallowed in tuning with the 4l60e unless you have changed the settings.
I would guess you may have a PCS failing tough likley if its been this way long damage has allready occured and you will likey soon need a trans.

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vetteemt

01-30-2008, 12:04 PM

With just headers and a lid for mods my tranny went out at 45K. It started to slip and just got worse. Had a local speed shop street/strip rebuild the trans and have 35K on it with all the new mods and no problems at all.

Also if you have the trans rebuilt I highly recommend installing a aftermarket trans cooler and a better trans pan that holds more fluid and ads in cooling either by fins or tubes. The cooler the transmission is the longer it well last.