#87021 - 07/14/06 06:18 AM
Cure for 97's mushy shifts
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Registered: 02/08/04
Posts: 3463
Loc: Gonzales Tx.
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Here is a cheap and easy fix for the 4t60e's shifting ,since you have a vacuum modulator to assist shifting you can buy a cheap and adjustable vacuum modulator,the part # at auto zone is mv303 ,if they ca'nt find the part # ask for a trans. vacuum modulator for a 96 GP with a 3.4 ltr.,on the top of the part turn clockwise 3 turns for a firmer shift .Chico.
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#87022 - 07/14/06 08:27 AM
Re: Cure for 97's mushy shifts
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Registered: 06/08/06
Posts: 362
Loc: Topeka, Kansas
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Nice little tid bit of info. How did you figure this out???
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2007 Shadow Gray Metalic GXP K&N Air Filter & More goodies to come. 
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#87023 - 07/14/06 11:10 AM
Re: Cure for 97's mushy shifts
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Registered: 07/15/04
Posts: 3141
Loc: Chicago, IL
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Chico - The Man!
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DHP V1.0, Slotted rotors, S/S Brake Lines, Custom CAI, GMPP Handling Kit, KYB's, Jimmy C DP (U-Bend delete w/ Hi-flow cat), Flowmaster Super 40's, drilled 180° T-Stat, Alt. Rewire & Alt. Voltage Booster Combo, 605's, ZZP Motor Mounts
"The only difference between me and a madman is that I am NOT mad!" - Dali
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#87024 - 07/16/06 01:06 AM
Re: Cure for 97's mushy shifts
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Registered: 07/11/06
Posts: 40
Loc: michigan
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is this just for 97?
and i agree chico da man
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#87025 - 07/16/06 05:19 AM
Re: Cure for 97's mushy shifts
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Registered: 02/08/04
Posts: 3463
Loc: Gonzales Tx.
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Sorry only the 97 gt's used the 4t60e trans. this trans. was partially dependent upon vacuum for upshifts the supsuquent 4t65e was totally electronicaly controlled.Chico.
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#87026 - 07/16/06 08:10 AM
Re: Cure for 97's mushy shifts
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Registered: 07/11/06
Posts: 40
Loc: michigan
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#87027 - 07/16/06 08:17 AM
Re: Cure for 97's mushy shifts
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Registered: 03/02/06
Posts: 1059
Loc: Brooklyn, NY
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Chico, were is the vacumm modulator located?
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---Ray Dawson--- 1997 Grand Prix GT: ZZP SS M90 Kit--P&P Blower and LIM--3.8" Modular pulley--36# injectors--ZZP Wizair CAI--8.5mm MSD Wires--Autolite 103s@ .052--180* drilled T-stat--Tune Time Performance Tune--ZZP 2.5" D/P w/o Cat--ZZP Stage 1 HV TB--ZZP Power Log & Rear PEM--ZZP Poly Motor & Tranny Mounts--Flowmaster 40 Series Delta Flow Mufflers--Auto Meter Z Series Boost & Oil Pressure Gauges--Aeroforce Interceptor Scan Gauge New York Metro Club Grand Prix www.nymcgp.com
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#87028 - 07/16/06 05:23 PM
Re: Cure for 97's mushy shifts
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Registered: 02/08/04
Posts: 3463
Loc: Gonzales Tx.
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Just follow the vacuum line from the throtle body to the top of your trans. your there.Chico.
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#87029 - 06/26/07 09:20 PM
Re: Cure for 97's mushy shifts
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Registered: 12/27/06
Posts: 46
Loc: Colorado Springs
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You said on the top of the part turn clockwise 3 turns for a firmer shift, was that three full clockwise turns?
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Army, Kinder and Gentler
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#87030 - 06/26/07 09:48 PM
Re: Cure for 97's mushy shifts
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Registered: 02/09/07
Posts: 1937
Loc: Pocono, PA
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how do you install that ??
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#87031 - 06/26/07 10:58 PM
Re: Cure for 97's mushy shifts
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Registered: 12/27/06
Posts: 46
Loc: Colorado Springs
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I just bought one and I'll try and take pictures. It is in the Haines manual with pics I believe.
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Army, Kinder and Gentler
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#87032 - 06/26/07 11:11 PM
Re: Cure for 97's mushy shifts
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Registered: 02/03/04
Posts: 1952
Loc: Mexico City
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Define "MUSHY" Sorry 
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 ---------------------------------- My GP went away after more than 5 years of nice driving, good trips all along mexican territory, some mods, stories and headaches, I'm gonna miss it! ----------------------------------
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#87033 - 06/27/07 12:06 AM
Re: Cure for 97's mushy shifts
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Registered: 04/30/06
Posts: 3201
Loc: Groton, CT
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mushy = soft
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 '97 SE with alot of mods
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#87034 - 06/27/07 12:21 AM
Re: Cure for 97's mushy shifts
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Registered: 02/03/04
Posts: 1952
Loc: Mexico City
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Thanks! And this menas more time between gears?, making them harder is because this time is reduced?, or what is the advantage? Sorry to do this, on this topic but have you heard of this? http://www.techvelocity.com/gtp/trans.htm
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---------------------------------- My GP went away after more than 5 years of nice driving, good trips all along mexican territory, some mods, stories and headaches, I'm gonna miss it! ----------------------------------
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#87035 - 06/27/07 12:36 AM
Re: Cure for 97's mushy shifts
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Member
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Registered: 12/27/06
Posts: 46
Loc: Colorado Springs
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Ok so I bought the 96 GP GT trans vacuum modulater and here are some pics. It is different than the the stock one I have on my 97 GT. It fits and is in secure. I just wonder about the 3 turns? The nipple has a slotted (screw?) I turned it three times, i.e. half turns, not a complete 360. So I wonder is it 3 complete 360 degree tunrns? I will post a pic of the container with the part number on it later, I got mine from Checker auto parts.  
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