bluecmaro96

if you floor your car what mph should it kick into last gear? mine doesnt seem to kick in last gear it seems like it stays geared low for a long while.

blkZ28spt

3.23 or 2.73?? With my 3.23 it didn't shift into fourth gear until an indicated ~140 mph almost.

Use this: http://www.f-body.org/gears/

FYI: It took me 30 seconds to find that through searching. Entered gearing calculator and searched, first thread i clicked on i scrolled down till I saw a website......boom there it was.

bluecmaro96

3.23 gears, ok because i had mine up to 130 a few times and when i let off it was pretty loud because it didnt shift into 4th, thanks

blkZ28spt

No problem. I love the way that they sound when you hang it in the upper RPM range of a gear......usually get it in the 70's at the top of second gear.

SmokingWS6

iTrader: (1)

It'll shift, it sounds louder b/c its taking longer to run through 3rd, few more mph and it'll shift into 4th

If you have a converter it'll shift at a few mph lower due to the looseness of the stall. With my 3.42's and vig 3200 i think it hits 4th around 125, i can't say for sure, who's looking at the dash when doing 125?

K9Kev

iTrader: (28)

I look..... I'm pacing the guy in front of me...lol

Anyway, as our car is not actually a B4C, I have heard a few people say that the B4C package is tuned differently and the PCM lets the car shift earlier (around 120) to achieve more MPH?? I don't know if this is true or not but my car never seems to get out of 3rd. I have the 3:42 gear, and it's a pain when I get up around 160 MPH...cars at 4500-5000 RPM

Anyone have insight on changing this?

98boxer

iTrader: (7)

K9KEV, that's a mean, looking Camaro in the photo signature, glad to see we got relatives within law enforcement, now, how about a, free from speeding tickets, card? J/K.

SmokingWS6

iTrader: (1)

K9, your simply out of gear 5000 rpm's at 160 sounds about right, thats definately in 4th gear. I'm really not sure how I know this officer

John_D.

iTrader: (2)

At 100% tps, the stock shift point table says don't upshift from 3 to 4.

Here is a table I used for building/checking my shift points with 3.42 gears.
I ran it on up to 6700 rpms to match my limiter, but 6200 is the stock limit.
6700 is good for 201.8 mph in overdrive...


---- Tranny Gear ratio
RPM 3.059 1.625 1.000 0.696
---- ----- ----- ----- -----
0700 004.8 009.0 014.7 021.1
0800 005.5 010.3 016.8 024.1
0900 006.2 011.6 018.9 027.1
1000 006.9 012.9 021.0 030.1
1200 008.2 015.5 025.2 036.1
1500 010.3 019.3 031.4 045.2
2000 013.7 025.8 041.9 060.2
2500 017.1 032.2 052.4 075.3
3000 020.6 038.7 062.9 090.4
3500 024.0 045.1 073.4 105.4
4000 027.4 051.6 083.8 120.5
4500 030.8 058.0 094.3 135.5
5000 034.3 064.5 104.8 150.6
5500 037.7 070.9 115.3 165.6
6000 041.1 077.4 125.8 180.7
6100 041.8 078.7 127.9 183.7
6200 042.5 080.0 130.0 186.7

12secSS

iTrader: (30)

Hmm, maybe the older LS1 F-bodies had that, no 3-->4 shift. My 2001 SS used to shift into 4th at 135 with the stock converter, I have had my SS upto 160, just before the limiter. It was in 4th, the rpms came down after 135. Plus with my HPTuners program I verified the 3-->4 shift point, it is at 135MPH. I am not sure how my higher stall converter have affected this, since I have not made any top speed passes lately. K9KEV, look into HPTuners to adjust your shift points to where ever you want. This is a great software package at an affordable price!

HPTuners

K9Kev

iTrader: (28)

Smokin, you crack me up

But seriously, I'm thinkin that the 98-00 may not have been able to shift 3-4 without tuning.

I'm gonna look into the HP Tuner
Thanks

blkZ28spt

Stock plus loudmouth, mine shifted into fourth at about 140 mph.

WAHUSKER

iTrader: (4)

Mine would shift into 4th at 145mph @ 6300rpm with 3.23s. I haven't tried it since the gear swap, but I figure it's around 120 now since I'm turning ~ 6k ! 113 mph at the track (and I can take it up to 6500 rpm now).

Sky042

iTrader: (1)

On the off chance you haven't read this
http://www.ls1.com/forums/showthread.php?t=423690

Straight from the horses mouth.