For anyone out there that has ANY input for me......
When I come to a complete stop and began acceleration my car shifts HARD into 2nd. It's not making any noises only shifting really rough. If I take off fast from a complete stop it sounds like my tires jump/skip when I hit 2nd gear. I checked the trans fluid and it's well above the hatched area so it doesn't need fluid.

I have an automatic trans but I often use 1 & 2 on my gear shift when I take off from a complete stop. Usually to show guys that girls like speed too!

Anyway, I'm going to take it to the dealer but still wanted to run it buy you guys to see if there is anything I should keep an eye out for.

1998 Camaro Z28 LS1 Expansion chip auto trans.

 

I don't know whose link this is, but it rocks !!

Thanks !!

Anyway, this kinda sounds like your deal.

See here:

http://web.archive.org/web/200111201...7-30-023A.html


The main link is:

http://web.archive.org/web/200110151...regg/gmsi.html


Good Luck !!

Britt



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'99 T/A
Best 13.071 @ 104.92
Now own '99 SS # 2073 !
12.969 @ 105.44

 

Well i just got my 99 out of the shop because i blew a front and rear seal in the tranny because i played the"1,3,D" on the stick, thats a no no with the A4 you will end up burning the tranny out, anyway thank god for warranty because all i can say is DAMN that would have been a lot of money

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99Z28RS(A4)Navy Blue Metalic
SLP LoudMouth
SLP Air Temp Module
MTI Carbon Fiber Air Lid/K&N
EGR Mod,FRA Mod
-----------------
-Future Plans-
Save my Chee$e till next summer then tear into motor

 

Word of advice, don't shift your car. If anything, put it in D, not over-D. It's faster than shifting and you won't grenade you trans. The only time you should manually shift is in the snow, and only if you have to? 2nd gear start is great for the snow. You'll need it in Chicago.

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2000 Camaro Z28 Monterey Maroon Metallic, A4 ,leather, 323 posi, Monsoon w/CD, T-tops, K&N

 

You might have to eloborate on it for me.

It IS normal for our trannies to shift hard when under part throttle at the 1-2 shift point on many occassions. Under slightly harder throttle, it should feel a little more smooth and crisp.

At WOT (hard launch), more often that not with an A4, the 1-2 shift will cause your tires to definitely chirp. Is that what you mean by skipping/jumping? If it is, it's normal.

Try to never manually shift the car. For one, it is bad for the transmission. Furthermore, believe it or not, the computer is better at shifting than we are. Lastly, you need to be aware that our tachs LAG by about 400-500 rpm under hard throttle - IOWs, you may easy over rev your engine.

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2000 Pewter SS #C161
SLP Dual-Dual, Bilstein suspension, Eibachs, 21mm/35mm swaybars, GMAF
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BMR Boxed LCAs, BMR PHB, BMR SFCs, G2 DSL, Nitto 555R, Heavy Lead Foot...
http://community.webshots.com/user/murlynd

 

Excuse the ignorance....but what is an A4??? And thanks for all the input so far.

 

Automatic 4 speed !

Now, you know.

Britt

 

A4 means automatic 4 speed. All automatic Camaros have them. M6 menas manual 6 speed. Chriss is right. Mine chirps 2nd when I gun it, even with the air conditioning on. When the car upshifts at higher rpm's, it's actually violent to someone not expecting it. It you car is modified, it'll be worse.

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2000 Camaro Z28 Monterey Maroon Metallic, A4 ,leather, 323 posi, Monsoon w/CD, T-tops, K&N

 

Ok so now I know that A4 is what I got and that I should never never do the shifting for the car.:P

I've had this car for over a year and I'm aware of the shifting that occasionally is on the rough side BUT during the last couple of days it has entered the 'violent' shift category. Which is why I looked to all you guys for help. I swear I'm going to be more technical than my boyfriend after chatting with all of you.

Looks like it might be that control valve thing. I'm planning on taking to the dealer just to make sure.

By the way....doesn't SS = super slow???

 

Almost right.. OD is where it should always be all driving... I have found on my 4L60E trannies (6 of them) that D-OD make no difference and its just as well to leave it in OD. The manual states to leave it in OD as well. manually shifting for speed is pointless. That is why Autos can be more consistant and run very decent 1/4s. My auto wasnt shabby.. and no LS1 at the track had beat me to the 1/8th in my auto.

Blueyees, you may want to check out my website.. not a t-n-a site.. its really about women who race and like to race..


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Psycho Cabbage
2002 Camaro Z28
(6 sp) Bone stock
Webmaster for RaceHer.com
Check out the current polls and vote!
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-Traded in- 1995 Camaro Z28 (A4 (#6 I might add!),ES tranny mount and torque arm bushing,SLP CAI,ASP 34% Underdrive,Strange 3.73's (shredded Auburn),1LE alum driveshaft & intake elbow,Yokohamas AVS Intermediates,160-stat,MAF screen removed, HPP+(for shift points only),Borla Y-pipe, Flowmaster Force-II catback, Gutted Cat, Airlift Airbag, !TB Bypass, J&M LCA's, Bosch Platinums, Moroso BlueMax Wires, Free RamAir, Meziere Electric H2O pump, MAC 3point STB, BMR Panhard, SCR SFC's
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best 13.44 @103.26
0-60ft 1.96
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0-60MPH 4.8sec
1987 Porsche 944S (waiting on LT1 mod)

 

At WOT your AC should cut out.. test it sometime.. It comes back on when you let off.

 

If it is a more violent shifting than usual, then I'd say you do have a tranny problem. But I won't guess at the seriousness of it.

I take it no SES lights popping up (sometimes does)? It might not be a bad idea to install a tranny cooler in the future if you like to run hard. A stock driveline/tranny shouldn't really need it, but it sure helps to reduce the temperatures the tranny operates at.

 

Just to throw in my 2 cents. I have driven Automatics my whole life. I had a 87 firebird, 94 camaro and now I am in a 99 Z. I would drop the car into 2nd or 1st and run in 2nd and 1st at events like cruzen and car shows. I never had any problem doing this. The firebird had 197,000 miles on it, (no problems with the tranny), the 94 camaro had 168,000 miles on it when sold no problems and I shifted the car all the time (especially down shifting for a better sound and to brake on people riding my *** with out brake lights. And I will probably do it in this car. So I have driven this cars to more miles then most people drive them and do what everybody is telling to absolutely not do and never had any problems. But on the other hand I am a computer programmer, so I am no expert on cars but I have been in them for many, many miles and know what they can do. Again just my 2 cents. Not meant as fact.

 

Anyone have an idea on what it would cost to replace the valve body ? I just cleared my P1870 code (what this is) after having this problem. The problem/code hasn't come back, but it's only been 1 day. If I have to replace the valve body, I am just wondering what an estimate is ?

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99 Z28; Navy Blue Metallic
3.23 axle; A4;
SS Hood; Dynomax Ultra Weld muffler; Whisper lid
Chrome wheels& badges, red Camaro fills; T-tops; leather
Mohr Softball
Mohr Racing

 

Quote:
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Originally posted by "ZZed"
--------
Word of advice, don't shift your car.
If anything, put it in D, not over-D.
It's faster than shifting and you won't grenade you trans.
The only time you should manually shift is in the snow,
and only if you have to? 2nd gear start is great for the snow.
You'll need it in Chicago.
-----------------------------

This is my first F-Body LS1 and mine also has the A4.
I have wondered about what "ZZed" alluded to with regard
to starting in "D" but not "OD" and have read an official GM
related tech bulletin online which says in part:

Quote:
" In 1999, SGS (Second Gear Start) became standard on all automatic cars as a type of traction-control-like system. It starts the transmission in second gear instead of first to help prevent wheel spin on slippery surfaces. It does hurt the transmission (it heats the fluid more because the torque converter is slipping more) and offers no benefit during everyday driving. The old disc-type limited slip differential (Auburn) was replaced with a Zexel-Torsen torque sensing ip differential. The new differential requires the use of synthetic differential fluid because of its design. The slip-limiting uses metal-to-metal contact inside the case and thus requires the use of the more "slippery" synthetic lubricant."
------------------------------------------

I have only had my '99 Z28 since late July, and have been trying to figure out if that "SGS" is actually the way these cars are programmed to work from a dead stop in "OD". Since reading the above, I have started putting my car in "D" around town in stop & go traffic and it seems to feel like it takes off from a stop in 1st gear this way. Has this issue been discussed in this forum before, and if so, please forgive the repeat, as I am new to the board.

I have learned something new with this Harsh 1-2 upshift problem, and I appreciate the info that I find on the board so far. In this case it would be good to only have facts that have come from GM, rather than anecdotal info.

Thanks for any factual input in advance...



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ChevyGoldfinger

Pewter '99 Z28 LS1
T-Roof coupe A4 3.23:1

GM sport appearance ground effects option, factory tinted side & rear windows.

Chrome GM 5 stars with Yoko 245/50 V rated

MBA Aluminum Pedals & Door sills

SS Stainless rear insert letters

QTEC Cutout, TransGo shift kit, only performance mods so far.

No Time slips yet, just got this car in July '02

Plans for Currie 9" with 3.73 posi, GMMG catback exhaust. LS1 edit.