History / OriginalityGot a question about 1982-1992 Camaro or Firebird history? Have a question about original parts, options, RPO codes, when something was available, or how to document your car? Those questions, answers, and much more!
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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.
__________________ LT1 headed LG4 305 beast! Comp Solid lifter XS-262-10S, 1.6 Roller Rockers, 10.2:1, Holley 4160 600cfm, modded Weiand 7502 intake to fit LT1 heads____ Custom cylinder head cooling. Weiand 8208 Short Water Pump____TH-350 3 series 3.73 with 2 series posi and spacer____ Hedman Hedders 1 5/8 headers and Y-pipe 3in Exhaust, Dynomax 3" Bullet muffler ____Moroso Ultra 40 Wires ACCEL HEI Super Coil ____Competition Engineering 3120 Bolt-on SFC's____Homemade: Wonderbar, solid tie rod sleeves, Aluminum LCA and Panhard Rod with spherical rod ends, alternator and PS bracket, Strut tower brace, and Decoupling torque arm with telescoping link.
3000lbs
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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.
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?)
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.
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
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!
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
__________________ "There are more things in heaven and earth, Horatio, / Than are dreamt of in your philosophy." Hamlet
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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..
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 !!!
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.
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
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:
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
__________________ IM or text me 217 671 7792 i don't check forums often!! fastr68 on yahoo msngr anytime! 1982 Trans Am HT WS7 - i have no F-body cars any more- i still do have many '82 to 84 AND '85-up bird and camaro parts and parting out 1991 S10 also all pieces blue colorCo-Founder of the Early Bird Club(82-84)
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
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:
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 
