Do stock Lb9/2.73 cars chirp tires at 1-2 shift?
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Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Do stock Lb9/2.73 cars chirp tires at 1-2 shift?
Cuz mine does all the time w/o fail and the tires have decent tread left. Because it has 2.73 gears I wouldn't think that is possible w/o a shift kit.
Joined: Feb 2001
Posts: 13,756
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Do stock Lb9/2.73 cars chirp tires at 1-2 shift?
Originally posted by BigWhiteGTP
Cuz mine does all the time w/o fail and the tires have decent tread left. Because it has 2.73 gears I wouldn't think that is possible w/o a shift kit.
Cuz mine does all the time w/o fail and the tires have decent tread left. Because it has 2.73 gears I wouldn't think that is possible w/o a shift kit.
Senior Member
Joined: Jul 2004
Posts: 742
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From: Victorville, CA
Car: 85 Trans Am
Engine: 350 (CCC QJet)
Transmission: 700R4
Axle/Gears: 3.08 9 bolt
Low weight rear end
Moisture on pavement/tires
Tranny pressure ?
Lots of variables, if it runs good, so be it
Moisture on pavement/tires
Tranny pressure ?
Lots of variables, if it runs good, so be it
Joined: Mar 2004
Posts: 1,643
Likes: 50
From: Manitoba
Car: '91 GTA
Engine: 421sbc
Transmission: Powerglide
Axle/Gears: Ford 9" with 3.89
My original gears(2.73) used to chirp the tires as well.
Now with the 3.42's, it's even better.
LB9GTA
Now with the 3.42's, it's even better.
LB9GTA
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Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Re: Re: Do stock Lb9/2.73 cars chirp tires at 1-2 shift?
Originally posted by ShiftyCapone
Well if yours does isn't your question answered? It doesn't mean you have a shift kit though.
Well if yours does isn't your question answered? It doesn't mean you have a shift kit though.
But what did you mean by "It doesn't mean you have a shift kit though"? Could it be a cam or torque converter?
Joined: Mar 2004
Posts: 1,643
Likes: 50
From: Manitoba
Car: '91 GTA
Engine: 421sbc
Transmission: Powerglide
Axle/Gears: Ford 9" with 3.89
When I added my shift kit (after the gear swap) made the chirping even easier.
The shift kit makes the shift instantaneaous(sp) instead of a smooth drawn out shift.
LB9GTA
The shift kit makes the shift instantaneaous(sp) instead of a smooth drawn out shift.
LB9GTA
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Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
My L98 and 2.77 rear does not chirp second with the stock tranny. It shifts pretty damn firm at WOT but not tire breaking hard.
Joined: Feb 2001
Posts: 8,494
Likes: 411
From: Sophia, NC
Car: 2016 Camaro SS + 1986 Z28
My L98 and 2.77 rear does not chirp second with the stock tranny. It shifts pretty damn firm at WOT but not tire breaking hard.
Less power, slightly taller gear (basically the same), identical trans.....I'd say a Lb9 would NOT chirp into 2.
.....but I've heard it ALL here on TGO
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Supreme Member

Joined: Jan 2003
Posts: 2,043
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From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
If I were to look inside the tranny pan, would it be obvious that there is a shift kit? Would it say Trans-Go right there or do the shift kits look like the GM peice?
Joined: Feb 2001
Posts: 13,756
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Re: Re: Do stock Lb9/2.73 cars chirp tires at 1-2 shift?
Originally posted by BigWhiteGTP
But what did you mean by "It doesn't mean you have a shift kit though"? Could it be a cam or torque converter?
But what did you mean by "It doesn't mean you have a shift kit though"? Could it be a cam or torque converter?
Originally posted by BigWhiteGTP
If I were to look inside the tranny pan, would it be obvious that there is a shift kit? Would it say Trans-Go right there or do the shift kits look like the GM peice?
If I were to look inside the tranny pan, would it be obvious that there is a shift kit? Would it say Trans-Go right there or do the shift kits look like the GM peice?
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Joined: Oct 2002
Posts: 9,067
Likes: 1
From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
I have 3.73s and a 5-speed.... I've nearly turned it around going into 2nd gear... more than once too!
Member
Joined: Aug 2001
Posts: 483
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From: Dallas, Tx
Car: 88 Trans Am
Engine: lt1 intaked 355 makin 277 on 25 psi of fuel pressure and stock timing :)
Transmission: A4 stock... that moved a mobile dyno a foot shifting into 2nd :)
hey man my bone stock lb9(blown head gasket as well) with a stock a4 and a stock 2.73 rear would break the tires all the time hitting 2nd and its got like 156k on the clock.. just installed 3.73;s and damn.... does it even better lol and its not the tires... 275/40/17's fusion zri's brand new almost... but hardly any miles on them....so
Joined: Dec 1999
Posts: 3,544
Likes: 19
From: WI,USA
Car: 89 FORMULA 350, 91 Z28 Convertible
Engine: ls1, LB9
Transmission: t56, Auto
Axle/Gears: S60/ 3.73
depends on the tires too but, if you guys with l98 cars arn't getting that firm of a shift perhaps your trans was swaped out? weak acumulator spring, these cars are very old now. and any number of reasons
keep in mind it is a chirp not a big bark into second like a standard trans does
a broken acumulator spring will give a very firm shift too (like a shift kit)
keep in mind it is a chirp not a big bark into second like a standard trans does
a broken acumulator spring will give a very firm shift too (like a shift kit)
Last edited by 88 350 tpi formula; Mar 7, 2005 at 01:19 PM.
Member
Joined: Aug 2001
Posts: 483
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From: Dallas, Tx
Car: 88 Trans Am
Engine: lt1 intaked 355 makin 277 on 25 psi of fuel pressure and stock timing :)
Transmission: A4 stock... that moved a mobile dyno a foot shifting into 2nd :)
yea mine will break them lose like its a stick now with the gear change... and as far as i can tell its the stock unit....
Joined: Feb 2001
Posts: 8,494
Likes: 411
From: Sophia, NC
Car: 2016 Camaro SS + 1986 Z28
I can't count the number of stock L98 i've driven, and I've never seen one chirp 2.
I'm not saying what will or won't happen, and I'm not there, so I can't speak for anyone elses car, but the guy asked a general question. TGO is NOTORIOUS for this kind of thing.
Does your car chirp second? Maybe it does, but I think it's fair to say that most won't.
I'm not saying what will or won't happen, and I'm not there, so I can't speak for anyone elses car, but the guy asked a general question. TGO is NOTORIOUS for this kind of thing.
Does your car chirp second? Maybe it does, but I think it's fair to say that most won't.
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Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Originally posted by Abubaca
I can't count the number of stock L98 i've driven, and I've never seen one chirp 2.
I can't count the number of stock L98 i've driven, and I've never seen one chirp 2.
Ive driven in three other L98's (one was a G92 also) and the only one to bark second had a shift kit.
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Joined: Jan 2003
Posts: 1,786
Likes: 1
From: Paxton, MA
Car: 1987 Camaro Z28
Engine: 335 TPI Stroker
Transmission: Tremec TKO 500
Axle/Gears: 10 bolt / 3.42
I've driven a stock L98 car with 3.73's, had to play with the throttle right to get it to bark 2nd if you know what i mean.
Joined: Jun 2002
Posts: 13,576
Likes: 30
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
my stocker tranny used to chirp second going around turns alot (creeping) but i have a locker. did it with the 3.73's as well as the 4.10's. 700r4's were notorious for having a ridiculously frim part throttle 1-2 shift.
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