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518/727 help please #3036236
04/23/22 09:39 AM
04/23/22 09:39 AM
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cincinnati ohio
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mcat4321 Offline OP
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did a search with no luck
3800lb car with 800whp turbo
built WELL 518, full auto valve body
launch fine, 1-2 shift fine, 2-3 had an rpm spike before shifting, didnt feel like a slip. more like brief neutral then drive.. trapped at 148mph.
drove home fine both leaving in drive and shifting manually
any ideas

Last edited by mcat4321; 04/23/22 09:40 AM.
Re: 518/727 help please [Re: mcat4321] #3036253
04/23/22 10:16 AM
04/23/22 10:16 AM
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Michigan
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A727Tflite Offline
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Originally Posted by mcat4321
did a search with no luck
3800lb car with 800whp turbo
built WELL 518, full auto valve body
launch fine, 1-2 shift fine, 2-3 had an rpm spike before shifting, didnt feel like a slip. more like brief neutral then drive.. trapped at 148mph.
drove home fine both leaving in drive and shifting manually
any ideas


Who built the trans.

Re: 518/727 help please [Re: mcat4321] #3036291
04/23/22 12:36 PM
04/23/22 12:36 PM
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Posts: 25,750
Rio Linda, CA
John_Kunkel Offline
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How long since you adjusted the kickdown band?


The INTERNET, the MISinformation superhighway
Re: 518/727 help please [Re: A727Tflite] #3036293
04/23/22 12:43 PM
04/23/22 12:43 PM
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cincinnati ohio
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mcat4321 Offline OP
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cincinnati ohio
Originally Posted by Transman
Originally Posted by mcat4321
did a search with no luck
3800lb car with 800whp turbo
built WELL 518, full auto valve body
launch fine, 1-2 shift fine, 2-3 had an rpm spike before shifting, didnt feel like a slip. more like brief neutral then drive.. trapped at 148mph.
drove home fine both leaving in drive and shifting manually
any ideas


Who built the trans.
russell with all aa parts

Re: 518/727 help please [Re: John_Kunkel] #3036296
04/23/22 12:44 PM
04/23/22 12:44 PM
Joined: Aug 2003
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cincinnati ohio
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mcat4321 Offline OP
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Originally Posted by John_Kunkel
How long since you adjusted the kickdown band?

never, relitively fresh 4 passes 500 street miles

Re: 518/727 help please [Re: John_Kunkel] #3036315
04/23/22 01:46 PM
04/23/22 01:46 PM
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Bend,OR USA
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Cab_Burge Offline
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Originally Posted by John_Kunkel
How long since you adjusted the kickdown band?
scope up twocents
Which valve body are you running? How high RPM are you shifting it at?


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 518/727 help please [Re: Cab_Burge] #3036328
04/23/22 02:21 PM
04/23/22 02:21 PM
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cincinnati ohio
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mcat4321 Offline OP
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Originally Posted by Cab_Burge
Originally Posted by John_Kunkel
How long since you adjusted the kickdown band?
scope up twocents
Which valve body are you running? How high RPM are you shifting it at?

stock VB with kit, shifting 6800ish

Re: 518/727 help please [Re: mcat4321] #3036343
04/23/22 02:52 PM
04/23/22 02:52 PM
Joined: Mar 2011
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Michigan
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A727Tflite Offline
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Call Russell.

He owes you.

Re: 518/727 help please [Re: A727Tflite] #3036356
04/23/22 03:19 PM
04/23/22 03:19 PM
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cincinnati ohio
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mcat4321 Offline OP
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Originally Posted by Transman
Call Russell.

He owes you.

absolutely, but considering this occurred last night, i figured i'd pick some brains until monday.

Re: 518/727 help please [Re: mcat4321] #3036383
04/23/22 04:10 PM
04/23/22 04:10 PM
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Michigan
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Originally Posted by mcat4321
Originally Posted by Transman
Call Russell.

He owes you.

absolutely, but considering this occurred last night, i figured i'd pick some brains until monday.


It’s called 2-3 flare.

Could be something simple or something inside the trans. You will get all kinds of suggestions here - I would trust your trans tech to set you straight.

You owe him the courtesy.







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