Its in, and I'm not to impressed. Whats all the hype about? Sure, it firmed up the 1-2 shift, but had I known what little difference it would have made, I probably would have spent the money on some air freshners or something.

I won't totally knock it untill I install the new pressure regulator spring and TV boost valve, but I thought for sure it would at least chirp in second.

Would anybody with a Vette servo care to defend?

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Ported Plenum,
TB Coolant Bypass,
SSM SFC,
Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks

'97 Bonneville SSE

 

I cannot defend, but I appreciate the info. Personally, I always thought my SRTA always had a nice firm 1-2 shift. It's that 2-3 shift that leaves something to be desired. Any thoughts on that one?

 

The 2-3 shift can be a tricky one to "tune" because it is a "synchronized" shift. Meaning that the 2-4 must release fully, the exact same time the 3-4 clutches apply. So to keep the tranny from doing some crazy stuff, you have to do alot of trial and error, more than most people want to play with.

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Ported Plenum,
TB Coolant Bypass,
SSM SFC,
Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks

'97 Bonneville SSE

 

Thanks for the advice. Trannies have always been the one aspect of cars that I have considered a "mysterious black box" best left to the gods and magicians.

Given that I am not inclined to "mess with mother nature" I will live with the "lack of firmness" from 2-3. It is only noticeable when I manually upshift from 2-3 at 5,000+ rpm, which is really rare. I generally just let it shift on its own and it does this at 5,000 rpm...which after many "tests" is the perfect shift point as my car is currently modded.

 

Hey there, ya know Im puzzeled by trannys my self, I have a billet servo that has a very hard firm shift from all shifts except first to second, I was told that the clip on the servo may have broken, because the first to second use to be as firm as the rest...I was also told that that clip can be replaced by a washer and that fixes the problem...
go figure...Black magic = 700r4

------------------
(Kill the headlights, and put it in neutral)

--George
92 RS 25th Aniv.
350 Goodwrench (NEW LO5)
700R4 Raptor: high performance intermediate billet servo, high performance overdrive billet servo,Mega Valve,13 vane high performance pump,1800 heavy-duty stall converter and a 29 element heavy-duty forward input sprag.

 

I have a vette servo and mine chirps in second almost all the time


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1984 Camaro Z28

Crate 350
Edelbrock Intake
Edelbrock TES Headers
Hooker 3" Catback
ASP Underdrive Pullies
Corvette Shift Servo

JBL 150watt Amp
JL Audio 12" sub

 

I installed the servo, boost valve, the whole shabang but it didn't make that much differance.

 

anyone know what the differences are in the different servos???



------------------
(Kill the headlights, and put it in neutral)

--George
92 RS 25th Aniv.
350 Goodwrench (NEW LO5)
700R4 Raptor: high performance intermediate billet servo, high performance overdrive billet servo,Mega Valve,13 vane high performance pump,1800 heavy-duty stall converter and a 29 element heavy-duty forward input sprag.

 

What do you mean "different servos"? What different servos are you refering to?

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Ported Plenum,
TB Coolant Bypass,
SSM SFC,
Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks

'97 Bonneville SSE

 

more surface area on the vette servo for the trans fluid to push on and engage third or some crap like that. I was very impressed with my servo, got rid of the 2-3 flare and barks 2nd every shift

------------------
91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 280 grind. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, ****ty stock converter
13.24@104

 

Im sorry u cant get a "chirp" with your now modded tranny. I could Blow Up the tires with my old stock tranny..

Maybe its not your tranny.. maybe you should like before that..

 

just curious but how many times have u race a corvette (older) and heard them snag a 2nd gear scratch??

 

Tf0r1, maybe your TV cable's slipped out of adjustment. Give that a check... as soon as I notice I get a softer shift, I know it's time to reset the TV cable. The "washer" idea might've been the idea to put a washer under the 1-2 accumulator spring. I found one under there from the Lee Myles guys.

Bernard, thanks for that servo info! That web page is great, by the way. Good to know that servo doesn't help as much as everyone says it does. I was considering diving in there to fix the 2-4 apply pin, but maybe the hell with it. What do you think? Is it worth my time? I figured if I had the servo out anyway to change the pin, I could put the 'Vette one in.


------------------
-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

were all real impressed tommy lee, Ive noticed you havent had an itellegent thing to say on any of the boards youve posted on. Am I wrong?

 

Actually vortecfcar, its the opposite. The piston surface is smaller on the Vette servo. The theory of hydrualics says that a piston with 2" squared will apply twice as fast as a piston with 4" squared. If you look at the tech article I did, you can see the Vette servo has almost half as much piston surface. servo

I don't think its the tranny either, I think its the lack of nuts under the hood (15.4@94MPH).

It really firmed up(with the valve/spring upgrade also) the 1-2 shift, and at WOT, it bumps hard into 3rd, wich should prolong the life of my 3-4 clutches (hopefully)

TomP, yeah, thats the best time to fix whatever is wrong with the apply pin, but whats wrong with it? If you are replaceing it, there are three different lenghts.

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
JET AFPR,
Ported Plenum,
TB Coolant Bypass,
SSM SFC,
Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks

'97 Bonneville SSE

 

That's kind of an odd time to run. That trap speed is that of a 14.4-14.7 second car. Was there a lot of wheelspin on that run?



[This message has been edited by MrJ (edited November 20, 2000).]

 

Some, it doesn't help being a peg-leg, even with 255 BF Goodrich's.

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
JET AFPR,
Ported Plenum,
TB Coolant Bypass,
SSM SFC,
Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks

'97 Bonneville SSE

 

GM tech, do ou have any sort of shift kit OR valve body OR seperator plate mods??? If you just go with the servo, you won't get much but combined with the PROPER other mods (honestly, not sure which ones) you can have a better OR worse tranny. Ie, if the vette servo applies (faster/harder) before the release of the previous gear, premature wear occurs on the bands/clutches... I am not the proper consultant but there is a web page somewhere on this and ProBuilt trans forum guy can probably answer you better.

I have never used the vette servo and have mainly used the B&M transpak (not cheapo shift improver kit) with great results. Also, B&M has a page with the instructions as a .PDF file that you can download and review. You can modify your tranny pretty much for free up to a point with those directions. Also, they will show you the absolute amount of tranny work needed to get good shifts. The street/strip version for the 700R is pretty awesome. (I will be honest state that I have no experience with the TransGo kit that many are fond of here...)

 

I also installed the TV Boost valve and pressure regulator spring.

It won't cause any problems with the 1-2 shift, becuase 2nd is a derivitive of first. 2-3 won't matter because the vette servo effects the apply rate, not the release rate, the only problem I could see would be the 3-2 downshift, but hadn't had any problems there.

I may eventually do a TransGo kit, but I wanted to see what all the "hype" was about on the Vette servo.

And really, this is what GM reccomends to firm up the shifts, check out GMPP 2000 Catalog for the LG4/L69 - 350 HO conversion. Those four tranny parts come with the kit "thats where I got the Part #'s from)

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
JET AFPR,
Ported Plenum,
TB Coolant Bypass,
SSM SFC,
Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks

'97 Bonneville SSE

 

is the vette servo itself a hard install? what must be done and is there good risk of screwing up tranny? last, can it be done with tranny on the car while car is on ramps?

------------------
1988 IROC 305TPI MINT!!
Mods= Accell SuperCoil, MSD 6A, Ported Plenum, No MAF Screans , K & N, 160 Thermostat+ Temp Switch, Relocated MAT, Cold Air

 

Once again I will post this link. All your questions are answered here. SERVO

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
JET AFPR,
Ported Plenum,
TB Coolant Bypass,
SSM SFC,
Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks

'97 Bonneville SSE

 

This 2-3 flare you speak of, i think i have it. i did the B&M stage 2 Transpak, and after i did, the revs "Jump" when i shift from 2 to 3.

Also, at part throttle, the 1-2 shift is hard as a rock, but a W.O.T. the 1-2 shift is barely quicker thar stock. what do you thnk this is.

------------------
1987 Trans Am
"Tired, old 305"
4 barrel
700R4 + B&M stage 2 Transpack
Thinkin' 'bout a 355

 

I have the SLP kit in mine.(comes with corvette servo)and it "chirps" with only 1/2throttle.Full throttle it "roasts"second,I couldn't be happier with the way it shifts.

------------------
1990 Trans Am GTA
Bosch plat+4 plugs,SLP plug wires,Hypertech coil kit,Fastchip PROM,SLP 160 therm,T-body bypass,SLP crankpulley,Breathless AFPR,,ported plenum,SLP runners,SLP flowbooster,SLP cold air,K&N,SLP 3"catback,SLP torqueconverter,SLP shiftkit,Mobil 1
14.3@96 stock
13.5@102 w/mods

 

sorry Gmtech, i soaw that link after i sent the reply, btw nice tech article

-Stell

 

GMTech, remember my trans would slip? It slipped in 2nd if I had the stick in D or OD, but it holds second fine when the stick's in 2. We thought the 2-4 band apply pin wasn't the correct length.

And FastBroker, I went there a while ago for that PDF, but it looks like B&M scanned in the instructions for the Shift Improver Kit. The instructions are the exact same as my $20 kit instructions! What else comes in the Transpak besides:

accumulator spacers, pressure regulator springs & snap rings, another spacer, drill bits, and plate gaskets?


------------------
-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

There are two different Transpak directions. Or two files, that is, on the site. Download the larger file, 565kb. It is the correct one. Sweet.

 

The on-line version (not sure what catalog you were looking at) lists 8642079 as the p/n for both the piston and housing. I assume the tech link you referenced had the right p/n for each.

 

the 8642079 is for the piston, but you NEED the housing to, or it will be like using a Geo metro piston in a 502 BB. The housing is 8673039. You also want the parts guy to look up the housing O-ring and the cover O-ring, sorry I don't have the numbers for those.

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
JET AFPR,
Ported Plenum,
TB Coolant Bypass,
SSM SFC,
Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks

'97 Bonneville SSE

 

The different servos I mentioned are the billet servos (in my above post)..
I am simply wondering what the difference is between them and the vette servo... Yeah I know what the sales pitch is but Im curious what the real deal is...
Thanks

------------------
(Kill the headlights, and put it in neutral)

--George
92 RS 25th Aniv.
350 Goodwrench (NEW LO5)
700R4 Raptor: high performance intermediate billet servo, high performance overdrive billet servo,Mega Valve,13 vane high performance pump,1800 heavy-duty stall converter and a 29 element heavy-duty forward input sprag.