Secondary Cross Member
#2
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
The long one? All of them, The short piece is probaly just the M5 cars as a spacer.
John
John
#5
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
The piece was stock on my 85 IROC with T5.
JamesC
JamesC
Last edited by JamesC; 11-07-2005 at 03:20 PM.
#6
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Posts: 3,852
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
It could just be the manual trannys. My car has one but i have a conglomeration of an 82 th200 and 83 t5 car. It not sits under a th350 though.
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#9
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
I've only had one reply to the poll I placed in the trans forum--82-85 auto. Go figure.
JamesC
JamesC
Last edited by JamesC; 10-26-2005 at 02:09 PM.
#11
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Joined: Jul 1999
Posts: 1,335
Likes: 2
From: Tucson, AZ, USA
Car: '92 Z28; Dk Teal; Her Pkg
Engine: 305
Transmission: Richmond 6 Spd
Axle/Gears: Moser 9", Detroit Locker, 3.70
Both my '84 Berlys had that cross member - one was an LG4 auto & the other was an LC1 auto.
#12
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Joined: Mar 2001
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Originally posted by Firebreed
my 83 berly DOES not have that, i have the stock 3 speed auto
my 83 berly DOES not have that, i have the stock 3 speed auto
John
#14
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Joined: Mar 2005
Posts: 1,539
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From: Honolulu, HI
Car: 2011 SS/RS
Engine: LS3
Transmission: Tremic6060
Axle/Gears: good enough
It was an option, One i wish i had along with t-tops *sigh* btw i can prove it with that dealer window sticker if you need me to
#15
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Posts: 6,775
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From: So.west IN
Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
That's an automatic trans x-member from all the one's I've seen.
Every car in the j-y here is an auto.. made is impossible to get a spare standard x-member when I hacked mine up for dual exhaust on my bird.
Every car in the j-y here is an auto.. made is impossible to get a spare standard x-member when I hacked mine up for dual exhaust on my bird.
#16
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
According to the Parts & Illustration Manual:
All LQ9s had a secondary crossmember with all transmissions.
All LH0s had it with the MD8.
LB8s had it from 82-89 with the MD8 and 82-86 with the MV9, MK5 and MK6.
LG4s and LB9s had it from 82-86 with the MV9, MD8, MK5 and MK6.
In all cases, the MV9 used 14019296, the MD8 used 14059976, the MV9 used 14019296, and the MK5 and MK6 used 14050111.
All LQ9s had a secondary crossmember with all transmissions.
All LH0s had it with the MD8.
LB8s had it from 82-89 with the MD8 and 82-86 with the MV9, MK5 and MK6.
LG4s and LB9s had it from 82-86 with the MV9, MD8, MK5 and MK6.
In all cases, the MV9 used 14019296, the MD8 used 14059976, the MV9 used 14019296, and the MK5 and MK6 used 14050111.
#17
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From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
My 86 Trans Am LG4 5 speed had the one piece x-member.
It also worked with the 4L60E I had in there with the LT1 temporarily.
My 88 Formula has the one piece x-member as well and that one worked with my 700R4 and with my T5.
It also worked with the 4L60E I had in there with the LT1 temporarily.
My 88 Formula has the one piece x-member as well and that one worked with my 700R4 and with my T5.
#20
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Van Nuys vs Norwood???
John
John
#21
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From: MA, USA
Car: 83 bird
Engine: 305/383
Transmission: WC T5
Axle/Gears: 3:42
Not sure how to figure out where they were made, but my VIN is 1G1AP87G7EN159148 for the 1984 Z28 (the VIN decoder said it was a Chevy Pontiac made in the USA in Canada... is it broken?)
I'll have to dig out my 88 Iroc VIN.
I'll have to dig out my 88 Iroc VIN.
#22
Norwood, the last digit before the build sequence will be N or L, N=Norwood, L=Van Nuys
I'll get back to you on mine being Van Nuys or Norwood, I am assuming Van Nuys as it is a West Coast car, but I'll check when I get home.
I'll get back to you on mine being Van Nuys or Norwood, I am assuming Van Nuys as it is a West Coast car, but I'll check when I get home.
#26
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Why is that weird? I have 3 87 Formula's 2 are from Van Nuys and I live about 5 hours from Norwood. Granted the 2 van nuys cars, 1 was purchased originally in Flordia, and the other in Arizona, the car that was originally purchased in Indiana was an Norwood car.
John
John
#27
I figured that it had to do a lot with area as to which assembly plant the car would come from. I can deffinately see Arizona being a L car, Florida would suprise me a little. However, I guess it is a much more random distribution then I expected
#29
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From: Orange County,NY
Car: 1982 Z28
Engine: 355
Transmission: T56
Axle/Gears: 12 Bolt
My factory Super T10 car has...err had it.I jus sold that and the trans today after yanking them out.
1982 Z28 LG4 with T10.Had the seconday mounts!
1982 Z28 LG4 with T10.Had the seconday mounts!
#30
Joined: Jun 2002
Posts: 13,572
Likes: 26
From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
all 3 of my camaros had that style. they were all originally v6 auto cars. 87, 89, and 90. i found a 1 pc one in a j/y and grabbed it cause i never saw one before and wondered if it worked the same...it does...and weighs like 3 or 4 pounds less!
#32
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Well, I guess that I'm as confused as I was before--pretty much a natural state, however. Is the piece designed as a vibration dampener (when I replaced the rotting rubber donuts, the difference was significant even with poly)?
JamesC
JamesC
#33
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Joined: Mar 2001
Posts: 14,242
Likes: 171
From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Yes, it helps with vibration transferring into the chasis, its the 3rd engine mount.
John
John
#34
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Joined: Mar 2005
Posts: 1,121
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From: Spicer, MN
Car: '83 Berli, '84 Berli, '84 Z28 HO
Engine: L69, LG4, L69
Transmission: TH700-R4, TH700-R4, T-5
Axle/Gears: 3.08, 3.08, 3.73 Posi
83 Berlinetta -700r4 -v8
84 berlinetta - 700r4 - v8
84 28 - T5 - v8
All of mine have that mount x-member. and that is all stock as far as the x-member goes. I finally found a place that sells the secondary transmission mounts (those donut looking things on that one below the trans mount) I need to order a set up for my cars.. supposed to reduce vibration even more..
84 berlinetta - 700r4 - v8
84 28 - T5 - v8
All of mine have that mount x-member. and that is all stock as far as the x-member goes. I finally found a place that sells the secondary transmission mounts (those donut looking things on that one below the trans mount) I need to order a set up for my cars.. supposed to reduce vibration even more..
#37
Joined: Aug 1999
Posts: 5,074
Likes: 374
From: RI
Car: 1984 Camaro Berlinetta
Engine: LT1
Transmission: T56 6-speed
Axle/Gears: 4.11 LS1 Rear End
I've owned over 25 Camaros and Firebirds since 92 and most of them were 84-86 cars of various types (mostly Camaros). With one exceptions all the automatics used the 2 piece X-member and the manuals used the 1 piece.
Almost all the 87+ cars I've worked with were autos and used the 2 piece X-member. The 87 5-speed Coupe I own right now has a 2 piece and it's the only time I've ever seen one on a 5-speed.
I'm re-building an 86 5-speed and just pulled a 1 piece out of it !!!! After reading this post It seems as if there was little rhyme or reason for the use of the x-members. The 2 piece will obviously give the tranny more cushion and they are interchangeable from tranny to tranny for the 84 and up years.
P.S. If your using Poly Bushings than you may as well install metal spacers cause you are going to feel EVERYTHING !!!
Almost all the 87+ cars I've worked with were autos and used the 2 piece X-member. The 87 5-speed Coupe I own right now has a 2 piece and it's the only time I've ever seen one on a 5-speed.
I'm re-building an 86 5-speed and just pulled a 1 piece out of it !!!! After reading this post It seems as if there was little rhyme or reason for the use of the x-members. The 2 piece will obviously give the tranny more cushion and they are interchangeable from tranny to tranny for the 84 and up years.
P.S. If your using Poly Bushings than you may as well install metal spacers cause you are going to feel EVERYTHING !!!
#38
Let's see now...
83 LG4/auto, 86 LG4/auto, 86 LB9/auto, 86 LB9/auto, 87 L98/auto, 89 L03/auto, 91 L98/auto, 91 L03/auto, all have/had the single piece crossmember.
84 2.8/5spd, 91 LH0/auto, had/have the 2-piece.
In my experience, based on my own cars, others I've worked on or gotten parts from, the 2 piece crossmember was early V8/auto and most 6 cylinders. Physically they both interchange. I personally wouldn't use the 2-piece crossmember on anything. All it will do is allow more movement in the drivetrain, which is exactly what we don't want... Unless of course you want the transmission mounting to flex instead of transfering the power to the ground.
83 LG4/auto, 86 LG4/auto, 86 LB9/auto, 86 LB9/auto, 87 L98/auto, 89 L03/auto, 91 L98/auto, 91 L03/auto, all have/had the single piece crossmember.
84 2.8/5spd, 91 LH0/auto, had/have the 2-piece.
In my experience, based on my own cars, others I've worked on or gotten parts from, the 2 piece crossmember was early V8/auto and most 6 cylinders. Physically they both interchange. I personally wouldn't use the 2-piece crossmember on anything. All it will do is allow more movement in the drivetrain, which is exactly what we don't want... Unless of course you want the transmission mounting to flex instead of transfering the power to the ground.
#39
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Wacky, i've never seen that bit before.
I have the '82 TA with T-10, and unless it was removed by a PO (doubt it), then I didn't have it.
I have the '82 TA with T-10, and unless it was removed by a PO (doubt it), then I didn't have it.
#40
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Posts: 14,242
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
ok, I decided to do some research in the PArts & Illustration catalogs
APEIRON stated this before.
The following used the "Trans Support Upper"
I4: 82-86
82 & 83 A3 MV9 14019296
84 - 86 A4 MD8 14059976
82 - 86 M5 14050111
V6: 87-92
87 - 92 A4 MD8 14059976
V8: LG4, LC0, L69, LB9 & L98
82 - 83 A3 MV9 14019296
83 - 86 A4 MD8 14059976
82 - 83 M4 MK5 14050111
83 - 86 M5 MK6 14050111
The other cars, such as the 87-92 V8 cars used the other type mount without the upper support. I could not find info on the 82-86 V6 cars, or the CFI, or L69, I would assume they are the same as the other V8 cars. The LC0 (TTA) is completely different.
It should be noted that the LOWER support has the following part numbers:
L4
82-86 MT 14050112
82-83 A3 14019297
83-86 A4 10029108
V6
87-92 A4 14050112
87-92 M5 14094483
V8
82-86 Not listed
87-92 14050110
APEIRON stated this before.
The following used the "Trans Support Upper"
I4: 82-86
82 & 83 A3 MV9 14019296
84 - 86 A4 MD8 14059976
82 - 86 M5 14050111
V6: 87-92
87 - 92 A4 MD8 14059976
V8: LG4, LC0, L69, LB9 & L98
82 - 83 A3 MV9 14019296
83 - 86 A4 MD8 14059976
82 - 83 M4 MK5 14050111
83 - 86 M5 MK6 14050111
The other cars, such as the 87-92 V8 cars used the other type mount without the upper support. I could not find info on the 82-86 V6 cars, or the CFI, or L69, I would assume they are the same as the other V8 cars. The LC0 (TTA) is completely different.
It should be noted that the LOWER support has the following part numbers:
L4
82-86 MT 14050112
82-83 A3 14019297
83-86 A4 10029108
V6
87-92 A4 14050112
87-92 M5 14094483
V8
82-86 Not listed
87-92 14050110
Last edited by okfoz; 10-17-2006 at 08:23 AM.
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#41
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From: Orange County,NY
Car: 1982 Z28
Engine: 355
Transmission: T56
Axle/Gears: 12 Bolt
Can anyone get an accurate weight reading of the crossmember with the secondary still attached for me? Please!
I sold mine with the original trans last year but want the weight of what it was for comparison to the new CM I made for the car with the T56.
I sold mine with the original trans last year but want the weight of what it was for comparison to the new CM I made for the car with the T56.
#42
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Joined: Mar 2004
Posts: 388
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From: Kansas, where the wind howls
Car: 84 Z28 H.O. w/Megasquirt II
Engine: semi-stock L69
Transmission: T-5 non W/C
Axle/Gears: 3.73 open
Not to add more confusion, but my 84 Z28 L69 has the secondary piece
Wait, thats what the chart says. Okay, so chalk one up to okfoz's chart.
Wait, thats what the chart says. Okay, so chalk one up to okfoz's chart.
#43
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Joined: Mar 2002
Posts: 4,812
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
Re: Secondary Cross Member
ok this is an old threadi know but i was always curious about this secondary crossmember ever since i had the 82 Z28 LG4 4 speed that had one of these secondary ones under it(converted to th350, clutch pedal still in car)
my 82 trans Am LG4 th200c has the single crossmember and it was all stock original untouched
i cant remembr on others, such as the 84 s/e 2.8 5 speed or the 85 trans am L69 700r4 or the 84 z28 same as the 85 drivetrain or the 83 z28 also L69 and 700r4, i think all of them were single xmember im about 90% sure, as i dont recall ever seeing a secondary type crossmember until the 82 z28 last fall, i was pretty surprised to see such a thing
good thread here
my 82 trans Am LG4 th200c has the single crossmember and it was all stock original untouched
i cant remembr on others, such as the 84 s/e 2.8 5 speed or the 85 trans am L69 700r4 or the 84 z28 same as the 85 drivetrain or the 83 z28 also L69 and 700r4, i think all of them were single xmember im about 90% sure, as i dont recall ever seeing a secondary type crossmember until the 82 z28 last fall, i was pretty surprised to see such a thing
good thread here
#44
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Re: Secondary Cross Member
ok, I decided to do some research in the PArts & Illustration catalogs
APEIRON stated this before.
The following used the "Trans Support Upper"
I4: 82-86
82 & 83 A3 MV9 14019296
84 - 86 A4 MD8 14059976
82 - 86 M5 14050111
V6: 87-92
87 - 92 A4 MD8 14059976
V8: LG4, LC0, L69, LB9 & L98
82 - 83 A3 MV9 14019296
83 - 86 A4 MD8 14059976
82 - 83 M4 MK5 14050111
83 - 86 M5 MK6 14050111
The other cars, such as the 87-92 V8 cars used the other type mount without the upper support. I could not find info on the 82-86 V6 cars, or the CFI, or L69, I would assume they are the same as the other V8 cars. The LC0 (TTA) is completely different.
It should be noted that the LOWER support has the following part numbers:
L4
82-86 MT 14050112
82-83 A3 14019297
83-86 A4 10029108
V6
87-92 A4 14050112
87-92 M5 14094483
V8
82-86 Not listed
87-92 14050110
APEIRON stated this before.
The following used the "Trans Support Upper"
I4: 82-86
82 & 83 A3 MV9 14019296
84 - 86 A4 MD8 14059976
82 - 86 M5 14050111
V6: 87-92
87 - 92 A4 MD8 14059976
V8: LG4, LC0, L69, LB9 & L98
82 - 83 A3 MV9 14019296
83 - 86 A4 MD8 14059976
82 - 83 M4 MK5 14050111
83 - 86 M5 MK6 14050111
The other cars, such as the 87-92 V8 cars used the other type mount without the upper support. I could not find info on the 82-86 V6 cars, or the CFI, or L69, I would assume they are the same as the other V8 cars. The LC0 (TTA) is completely different.
It should be noted that the LOWER support has the following part numbers:
L4
82-86 MT 14050112
82-83 A3 14019297
83-86 A4 10029108
V6
87-92 A4 14050112
87-92 M5 14094483
V8
82-86 Not listed
87-92 14050110
#45
Thread Starter
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Joined: Aug 1999
Posts: 19,282
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Secondary Cross Member
Just as general info. Here's the TTA version of the cross member from W72:
https://www.thirdgen.org/forums/atta...t-ttatrans.jpg
JamesC
https://www.thirdgen.org/forums/atta...t-ttatrans.jpg
JamesC
#47
Re: Secondary Cross Member
The rubber in mine has broken and i'm trying to find a fix if anyone can help let me know
https://www.thirdgen.org/forums/hist...91-camaro.html
https://www.thirdgen.org/forums/hist...91-camaro.html
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