Adjusting a billet servo
07-31-2002, 07:32 PM
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Adjusting a billet servo
I got a billet servo for free, not sure if I'm going to use it or not. Is there any special procedure for getting this set up in the trans? I know how to change a stock servo, just not familiar with where to put the washers and how to check for proper apply pin length.
07-31-2002, 08:28 PM
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Car: 88 Firebird WS6
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.42
08-01-2002, 12:29 AM
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I have a billet servo and a vette servo, I actually have a 554 servo in the truck right now, maybe I'll just leave it alone, it shifts fine as is. Thanks for the links.
08-03-2002, 07:05 AM
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The 554 Servo should only be used in a low output V6 or 4 cyl. I like the 553 for most applications. This is not the 'Vette Servo but what would be considered a V8.
08-03-2002, 12:38 PM
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Sorry about that it is a 553, it shifts fine so I guess I'll leave it alone. It's in an s-10 so the tires spin all the way through third, a vette or billet servo would probably make tire spin worse. Thanks for the replies.
08-03-2002, 03:57 PM
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actually if you do not have a 2-4 band with the stronger band struts on it the billet servo will probably tear the struts off.
Or it will break the strut where the round strut pin holds the band. That would be the pin that is under the valve body separator plate.
The billet 2nd gear servos 'hit' quite hard.
The only billet servo I use is the unit from Sonnax for the OD gear holding power.
I have about 27k miles on my Silverado with the Billet OD servo. I tried the vette servo in the truck but 'torque management' in the PCM really caused a weird 1-2 shift at hard throttle.
You will not have the trouble of torque management in your S-10 conversion obviously.
Or it will break the strut where the round strut pin holds the band. That would be the pin that is under the valve body separator plate.
The billet 2nd gear servos 'hit' quite hard.
The only billet servo I use is the unit from Sonnax for the OD gear holding power.
I have about 27k miles on my Silverado with the Billet OD servo. I tried the vette servo in the truck but 'torque management' in the PCM really caused a weird 1-2 shift at hard throttle.
You will not have the trouble of torque management in your S-10 conversion obviously.
08-03-2002, 05:28 PM
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Hi Crosley4,
What year is your truck with the torque management. I am guessing '98-up but am curious. Most of the early 4L60E's came with the 'Vette Servo but I think that in part to deal with the side affect of failsafe (often broken Sun Shell) that they decided to tone things down. What other mods do you have to the Tranny or did you just install the Servo and it started acting up?
What year is your truck with the torque management. I am guessing '98-up but am curious. Most of the early 4L60E's came with the 'Vette Servo but I think that in part to deal with the side affect of failsafe (often broken Sun Shell) that they decided to tone things down. What other mods do you have to the Tranny or did you just install the Servo and it started acting up?
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08-03-2002, 11:21 PM
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It's funny you mention the vette servo being in the truck trannys. I've had a few ppl think I was nuts when I say GM installed the vette servo into some truck 4L60E applications from the factory.
My truck is a 2000, 5.3 2x4 unit. It has the standard 553 servo in it from the factory. Only other mods I have done to the tranny is the addition of the TransGo spring and blocking sleeve into the Forward accumilator. The lazy engagement into "D" was driving me crazy.
You are obviously aware of the torque management system. I have run my truck with my laptop hooked into the PCM with scanning software from Ease Diagnostics(sp?).
The trucks computer kills the engine timing to zero under a WOT 1-2 shift. Interesting thing is after you start the truck up(warm or cold) you will get one good WOT 1-2 shift. The Tm system seems to be asleep a bit and the timing is only cut back to 5-10 degrees advanced. After that the TM is in full force and I have seen a minus 4 degrees timing a couple of times.
The vette servo increases the feel of the engine power cut back during the 1-2 shift at WOT. It almost feels like you have cut the ignition key to the off position for a split second.
With the vette servo and the tranny in the "tow/haul" mode the light throttle shifts were quite firm.
So I re-installed the 553 piston setup.
Tony
My truck is a 2000, 5.3 2x4 unit. It has the standard 553 servo in it from the factory. Only other mods I have done to the tranny is the addition of the TransGo spring and blocking sleeve into the Forward accumilator. The lazy engagement into "D" was driving me crazy.
You are obviously aware of the torque management system. I have run my truck with my laptop hooked into the PCM with scanning software from Ease Diagnostics(sp?).
The trucks computer kills the engine timing to zero under a WOT 1-2 shift. Interesting thing is after you start the truck up(warm or cold) you will get one good WOT 1-2 shift. The Tm system seems to be asleep a bit and the timing is only cut back to 5-10 degrees advanced. After that the TM is in full force and I have seen a minus 4 degrees timing a couple of times.
The vette servo increases the feel of the engine power cut back during the 1-2 shift at WOT. It almost feels like you have cut the ignition key to the off position for a split second.
With the vette servo and the tranny in the "tow/haul" mode the light throttle shifts were quite firm.
So I re-installed the 553 piston setup.
Tony
Last edited by Crosley4; 08-04-2002 at 08:15 AM.
08-05-2002, 04:16 AM
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EASE software? I am impressed! My old Snap-On is showing it's weaknesses. Some of the Software and not just Snappy's by the way have a lot of glitches and give bogus info or won't show codes W/O using generic OBDII. I may go to the EASE down the road too.
I am guessing you work in a Dealership if you are even aware of the TM Sytsem. On some other boards with later cars I posted leading questions to see if anyone noticed the symptoms you list and never got a response! This is why TransGo does not recommend going wild on the late model units. You can use their Vacuum Control System on the ones that drop line pressure to smooth shifts but that won't do anything for the timing cutback. If someone uses a custom chip then they can get around that portion though. If you want the 'Vette Servo you might get away with changing either the Accumulator Valve Spring or the Accumulator Valve itself to a lower rate one. Personnally I like the 553. I WOULD suggest the TransGo Shift Kit though for the VB wear prevention/correction. I have done 2000's that the TCC Reg Valve just flopped in the bore, same as a '95 or '96 would do. The kit will also tighten up the shifts a little W/O kicking in the TM System.
I am guessing you work in a Dealership if you are even aware of the TM Sytsem. On some other boards with later cars I posted leading questions to see if anyone noticed the symptoms you list and never got a response! This is why TransGo does not recommend going wild on the late model units. You can use their Vacuum Control System on the ones that drop line pressure to smooth shifts but that won't do anything for the timing cutback. If someone uses a custom chip then they can get around that portion though. If you want the 'Vette Servo you might get away with changing either the Accumulator Valve Spring or the Accumulator Valve itself to a lower rate one. Personnally I like the 553. I WOULD suggest the TransGo Shift Kit though for the VB wear prevention/correction. I have done 2000's that the TCC Reg Valve just flopped in the bore, same as a '95 or '96 would do. The kit will also tighten up the shifts a little W/O kicking in the TM System.
08-05-2002, 07:14 AM
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I work for Hughes Performance in Phoenix, I've never done that dealer thing in the 27 years I have fooled with automatics. We have connections with the Gm proving grounds in Mesa and TransGo.
TM is listed under the Emissions headings in the programing, hence some of the aftermarket reluctance to maniplulate the settings. I am sure you know TM's main function is too avoid the breakage of parts.
Emissions stuff is protected under federal law is probably why GM listed it there.
Tony
TM is listed under the Emissions headings in the programing, hence some of the aftermarket reluctance to maniplulate the settings. I am sure you know TM's main function is too avoid the breakage of parts.
Emissions stuff is protected under federal law is probably why GM listed it there.
Tony
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