Automatic Shift Points Too High?

Started by jheiv, January 06, 2004, 02:06:18 PM

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jheiv

Hey all, I saw on the W-Body message board about the tranny shifting at something that seemed ridiculously low to me.  Mine shifts anywhere from... around 6K to 8K.  Is that about right?  If not, how can I adjust that?  Sometimes to shift too, I'll have to ease off the gas.  That can really be rough when the kid in the tinted civic wants to show off for his girlfriend.  Thanks everyone.
1989 Red TGP
Mods: KYB-GR2 Struts and Mounts, Prior PMIII, K&N Filter, K&N Breather, 8.5 mm Wires
Upcoming: TopGun Chip, Coils, X-Over

turby

It should never come close to 8K. Either your tach is messed up or something else is wrong. Pull your vacuum modulator out and see if there is fluid in it. That may be part of the problem.

jheiv

It might be a little lower, but the tach def goes past the numbers past the orange and redline.
1989 Red TGP
Mods: KYB-GR2 Struts and Mounts, Prior PMIII, K&N Filter, K&N Breather, 8.5 mm Wires
Upcoming: TopGun Chip, Coils, X-Over

tyroelite

mine seems to do something like that also.  On my old N/A GP it did the same thing and pretty soon after the tranny really stopped working... as in, its in gear but revs like its in nuterual and then all of the sudden grabs the gear and skips the front tires from grabbing unless i ease off the gas as soon as it happens and shift to park then back to drive.  The TGP is sort of doing the same thing, it seems under WOT it doesn't shift where it should or as quickly as it should. I'm not as worried about it because I am planning a tranny swap to a 5speed this summer but it would be nice to know what the problem is... perhaps some sort of lightened or performance flywheel would help?

jheiv

That might be my alternative-- I was planning on diving into a 282 swap sometime, but if my tranny is going why not just get into it this summer??  :D

I'm thinking I can do all the wrench work, but did you guys with the 5-speeds have to do any kinda of fabrication.  I read somewhere something about converting axels to deal with the abs... Not real sure, couldn't find it again.  Thanks
1989 Red TGP
Mods: KYB-GR2 Struts and Mounts, Prior PMIII, K&N Filter, K&N Breather, 8.5 mm Wires
Upcoming: TopGun Chip, Coils, X-Over

ugotturbo?

8k???? yeah i would say that is a little high!  :shock:
89TGP: Bored 30 over, Head Work, J/E Pistons, Lunati Cam,NO CAT, Performance muffs, Top Gun, TT Supra Intercooler, K&N Short Ram Intake, ARP Rod Bolts. 15 PSI....Plenty more stuff on the way!!!

Tooky

May want to hook up a scan tool / datalogger and verify the actual RPM...  on mine it looked like it was hitting 6100 but in reality only was 5500 tops.  The stock TGP gauges are just heinously inaccurate.  My spedometer is also the worst of any vehicle I've ever rode in... (the HUD however is accurate).
Josh Straub
1990 Pontiac Turbo Grand Prix, GT2871R 475HP-capacity turbo, built 4T60, 28# Injectors, DIY Ostrich realtime chip tune, JeffM Crossover, Cold A/C, BoostValve.com manual controller @ 14 PSI.  200,000 mi factory original motor.  Best time on T25 @ 11 PSI: 14.78 @ 93 MPH.
1991 GMC Syclone: 11.79 @ 114 MPH. Stock with PT51 turbo plus SMC alcohol injection and tuning, 24 PSI

jheiv

the RPMS were a little higher on the gauges than in actuality-- but the clogged CAT made the engine rev more to get up to the speed to allow the tranny to shift

thanks everyone
1989 Red TGP
Mods: KYB-GR2 Struts and Mounts, Prior PMIII, K&N Filter, K&N Breather, 8.5 mm Wires
Upcoming: TopGun Chip, Coils, X-Over

dbtk2

Before I replaced the dash in my TSTE the speedo read a little over 20% fast, and the tach read like 25-30% high.  With the new dash the speedo is right on, and it appears that, if anything, the tach reads a little low.  I was told the rev limiter is set to 6212rpm, and the car looks to hit the limiter at like 6100, so the tach is probably very accurate as well.  However, in the 2 door tgp the speedo and tach appear to be about 7% fast...but the HUD is right on.

So the gauges being off is something that you should really expect with these cars.

Shawn
90 Maroon GP STE 3.1 I/C Turbo - SOLD!  :(
14.695 @ 94.49 w/2.228 60'
99 Green GP GT
9.75:1|K&N|160 tstat|no cat/ubend/res|ALT UD|Shift Kit|XPZ cam|Ported M90/TB/LIM/Heads|Powertuned|Pacesetters|42lb/hr|Stg 2 I/C|MPS|2.45"|ELEC WP|Zex 75/100/125|Walbro|ZZP IS|15/16"|AR103|Rollmaster|8 rib|MLS .052|ARP Head Studs|Billet FP|Alum Cradle
11.9912 @ 112.99 w/1.729 60', 347whp/417wtq on 93 octane/mustang dyno.

GangstGP

perhaps a TV cable would have helped this guy?
daily driver: 1990 Turbo Grand Prix 180k miles
backup car: 1990 Turbo Grand Prix 118k miles
spare parts: TGP motor and tranny from a red '89

z284pwr

You engine would have many many small little pieces scattered everywhere if it was reving to 8,000 RPM, anything after about 6400 stock can do bad things.  I have seen the Tach definitely high.  The higher it gets the worse it seems to, its kinda hard to get a nice good shift when you want shifting manually when you don't have a clue what its turning.

SpeedDemon

Quote from: dbtk2Before I replaced the dash in my TSTE the speedo read a little over 20% fast, and the tach read like 25-30% high.  With the new dash the speedo is right on, and it appears that, if anything, the tach reads a little low.  I was told the rev limiter is set to 6212rpm, and the car looks to hit the limiter at like 6100, so the tach is probably very accurate as well.  However, in the 2 door tgp the speedo and tach appear to be about 7% fast...but the HUD is right on.

So the gauges being off is something that you should really expect with these cars.

Shawn

I did the exact same thing and now mine is dead on too. My tach said the car was idling at 1200 RPM (after it was completely warmed up) but it sounded to much like 600 RPM to me. And the speedo was 20 MPH high but my HUD was correct. After I got My cluster back from GM the speedo is right on with my HUD and my car registers 500-600 RPM idle. But well worth every penny to get it fixed.
1990 TGP: stock minus the K&N air filter and high flow cat
1999 Oldsmobile Aurora: What a step up from my 95 Monte Carlo
1967 Plymouth Belvedere II: 318 c.i., Flowmaster Exhaust, and in deserate need of new rear tires.

TGPilot

Who is fixing clusters? I know I saw it way back when...but I wouldn't mind sending mine in for a once over... 8)

twinturbosedan

mine is wayyyy off too.  i've heard of some people resoldering it themselves and fixing things like this, but i didn't own a TGP back then and didn't pay much attention to what actually was done.

has anyone here fixed their own cluster?

2000 Audi A6 Quattro - 2.7T/6-speed
1998 Buick Regal GS - L67/HM-4T65E

Prospeeder

only thing i fixed was the CHECK GAUGES light on my cluster by sodering, i dont think any ammount of resodering will held, but if some1 has alot of time, go for it and see if it helps
1990 TGP Chipped RU-1390 K&N
2001 Audi S4 Stage 2
1999 VW Beetle
1997 BMW 740iL