OBS convertor lockup - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 17 (permalink) Old 08-20-2007, 04:20 AM Thread Starter
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OBS convertor lockup

What controls the firmness of the convertor lockup in the E4OD transmission? I have a BTS if that makes a difference. I am thinking it is in the pump but not really sure.

Tom

1996 F250 Powerstroke 4X4 AUTO
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post #2 of 17 (permalink) Old 08-20-2007, 05:07 AM
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Re: OBS convertor lockup

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Originally Posted by Tom S View Post
What controls the firmness of the convertor lockup in the E4OD transmission? I have a BTS if that makes a difference. I am thinking it is in the pump but not really sure.

Tom
The tune, and the V.B. the way it is set up I beleive.

97 crew cab shorty-4x4 Lots of mods .
Tuned by T Wildman
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post #3 of 17 (permalink) Old 08-20-2007, 12:10 PM
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Re: OBS convertor lockup

size of the dump hole in the pump controls firmness.
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post #4 of 17 (permalink) Old 08-20-2007, 04:01 PM Thread Starter
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Re: OBS convertor lockup

Jon thank for the reply. So is the firmness variable with engine power output rpm or something along those lines or does it hit the same way every time and has to be fairly stiff to prevent slipping at higher engine power output?


Tom

1996 F250 Powerstroke 4X4 AUTO
DP-Tuner F-6 chip live tuned, BTS Transmission, Garrett 38R Turbo, Swamps Injectors 150cc, electric fuel,
Banks Intercooler, Reflexxions Cowl Hood, 17 degree HPOP, 4" Stainless Magnaflow &
Aeroturbine exhaust, Aeroforce OBD Scan Gauge, Truxedo tonneau cover
Dana 60 Precision Metal Fab RSK and SD Springs
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post #5 of 17 (permalink) Old 08-20-2007, 05:17 PM
 
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Re: OBS convertor lockup

Is the E4OD a PW modulated lockup like the 4R100?

I know Jody changed my extreme tune to a on/off lockup via programming.
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post #6 of 17 (permalink) Old 08-20-2007, 05:36 PM
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Re: OBS convertor lockup

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Is the E4OD a PW modulated lockup like the 4R100?

I know Jody changed my extreme tune to a on/off lockup via programming.

no the e4od's are not pwm. No matter what (e4od's), the tc will unlock on the shifts unless a tc lockup switch is used. Jon did something to my built trans where it wont flare on the shifts at all even without using the tc lockup switch, maybe he'll chime in and enlighten us. Infact several times while racing i forgot to use my tc lockup switch and it made very little difference in my times.

My ford reman (in my 97) flares on the shifts even with Jons valve body, if the trans ever has to come out i'll let him do his magic to that one aswell.

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Last edited by Short Bus; 08-20-2007 at 08:48 PM.
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post #7 of 17 (permalink) Old 08-20-2007, 07:27 PM Thread Starter
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Re: OBS convertor lockup

So are you saying it does that electrically or mechanically? I don't think I have any shift flare.

Tom

1996 F250 Powerstroke 4X4 AUTO
DP-Tuner F-6 chip live tuned, BTS Transmission, Garrett 38R Turbo, Swamps Injectors 150cc, electric fuel,
Banks Intercooler, Reflexxions Cowl Hood, 17 degree HPOP, 4" Stainless Magnaflow &
Aeroturbine exhaust, Aeroforce OBD Scan Gauge, Truxedo tonneau cover
Dana 60 Precision Metal Fab RSK and SD Springs
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post #8 of 17 (permalink) Old 08-20-2007, 08:48 PM
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Re: OBS convertor lockup

jon did something mechanically in the trans to minimize the flair and/ or eliminate the tc unlock during shifts. Hopefully he'll see this post, cause i dont know crap about transmissions lol.

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post #9 of 17 (permalink) Old 08-20-2007, 10:57 PM
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Re: OBS convertor lockup

What issues are you having Tom?
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post #10 of 17 (permalink) Old 08-21-2007, 02:53 AM Thread Starter
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Re: OBS convertor lockup

No major issues really Jon other then the convertor locks up a little harder then I would like at light throttle esp in lower chip settings. The regular shifts were that way as well but I had those tuned out for the light acceleration stuff. It is not enought to warrant pulling the transmission by any means but it is enough that I wanted to learn some more and get some knowledgeable input. I have noticed this in other transmission as well and maybe it is partially the characteristic of the beast. I am also guessing that I am more particular about it then most as I know at lot of guys like snappy shifting stuff esp barking tires at WOT

Tom

1996 F250 Powerstroke 4X4 AUTO
DP-Tuner F-6 chip live tuned, BTS Transmission, Garrett 38R Turbo, Swamps Injectors 150cc, electric fuel,
Banks Intercooler, Reflexxions Cowl Hood, 17 degree HPOP, 4" Stainless Magnaflow &
Aeroturbine exhaust, Aeroforce OBD Scan Gauge, Truxedo tonneau cover
Dana 60 Precision Metal Fab RSK and SD Springs
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