Trans gurus: 1st gear issue on fresh build 4L80e
05-14-2014, 03:06 PM
#1
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Trans gurus: 1st gear issue on fresh build 4L80e Trans can be manually shifted or commanded via efiLive into 1st gear...but it only binds...loading engine...nothing else.
Shift into 2nd...either manually or commanded...and it frees up and works fine.
Dropped pan today...no carnage found...solenoids are clicking when shifts are commanded as well.
Fresh tranny, converter and motor...currently @ 693/623.
Any assistance would be greatly appreciated.
Thanks in advance!
http://www.performancetrucks.net/for...-shift-528797/
Shift into 2nd...either manually or commanded...and it frees up and works fine.
Dropped pan today...no carnage found...solenoids are clicking when shifts are commanded as well.
Fresh tranny, converter and motor...currently @ 693/623.
Any assistance would be greatly appreciated.
Thanks in advance!
http://www.performancetrucks.net/for...-shift-528797/
Last edited by Superado; 05-14-2014 at 05:03 PM.
05-14-2014, 11:21 PM
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Try this:
Put the shifter in manual 1st. Command 1st, 2nd, and 3rd.
Put the shifter in manual 2nd. Command 1st, 2nd, and 3rd.
Put the shifter in manual 3rd. Command 1st, 2nd, and 3rd.
Report back with the results for all 9 scenarios. That will possibly help determine where the issue is coming from.
Put the shifter in manual 1st. Command 1st, 2nd, and 3rd.
Put the shifter in manual 2nd. Command 1st, 2nd, and 3rd.
Put the shifter in manual 3rd. Command 1st, 2nd, and 3rd.
Report back with the results for all 9 scenarios. That will possibly help determine where the issue is coming from.
05-15-2014, 09:51 AM
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If the tranny has had the vac modulator mod since day one w/o issues...which it has...
is there anything in a standard rebuild that could cause issues if this mod isn't taken into consideration when rebuilding the tranny?
is there anything in a standard rebuild that could cause issues if this mod isn't taken into consideration when rebuilding the tranny?
05-15-2014, 01:02 PM
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I have a couple of ideas of what it may be, the tests I mentioned earlier will point us in the right direction.
06-13-2014, 10:42 AM
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Solenoids checked and seem to be fine.
Valve body checked and seems to be fine.
Truck will not shift out of 2nd automatically at all.
Both SOLUS and efiLive can command 2nd and up...but still not 1st.
No metal in pan.
Valve body checked and seems to be fine.
Truck will not shift out of 2nd automatically at all.
Both SOLUS and efiLive can command 2nd and up...but still not 1st.
No metal in pan.
Last edited by Superado; 06-13-2014 at 01:09 PM.
06-13-2014, 10:44 AM
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Try this:
Put the shifter in manual 1st. Command 1st, 2nd, and 3rd.
Put the shifter in manual 2nd. Command 1st, 2nd, and 3rd.
Put the shifter in manual 3rd. Command 1st, 2nd, and 3rd.
Report back with the results for all 9 scenarios. That will possibly help determine where the issue is coming from.
Put the shifter in manual 1st. Command 1st, 2nd, and 3rd.
Put the shifter in manual 2nd. Command 1st, 2nd, and 3rd.
Put the shifter in manual 3rd. Command 1st, 2nd, and 3rd.
Report back with the results for all 9 scenarios. That will possibly help determine where the issue is coming from.
Thanks!
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06-14-2014, 09:44 AM
#8
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Sumbeach!!!
Tranny is working now!
Changed out solenoids just to eliminate them completely from the diagnosis ...tranny is shifting perfect now...even in 1st.
Tranny is working now!
Changed out solenoids just to eliminate them completely from the diagnosis ...tranny is shifting perfect now...even in 1st.