I'm swapping in a newly rebuilt 700R4 over the next week and am ordering a new polyE tranny mount from Jegs when I notice "Secondary Transmission Crossmember Mounts" in the catalog. Where do these go and should I get polyE ones or stock? The reason I'm asking is I can't recall seeing them on my old tranny and was wondering where I missed them.

EDIT: Of course, if they're for a manual transmission that could be the reason for missing them...

Thanks,

Steve

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Steve's Trans Am Temple

[This message has been edited by scauffiel (edited April 17, 2001).]

 

Those were only for the early third-gens. I had called Energy Suspension up to ask about them and they aren't on the '84? and later third-gens.

Cool! 400 posts!

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Greg Westphal
'87 IROC 305TPI/A4

[This message has been edited by GregWestphal (edited April 17, 2001).]

 

Cool, thanks Greg.

Steve

 

I have NEVER been able to figure out what cars these were installed in. My friends '83 Crossfire A4 didn't have it, but my '84 carbureted V6 M5 did.

Same thing with the metal "balance weight" hung off the end of the tranny. This one, at least, I think is a non-V8 engine thing, but I'm not sure of anything else.


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"Beware he who would deny you access to information, for in his heart, he dreams himself your master"

'84 Black Camaro ZZ4 M5 (V-6 in a former life) -- street beast
'91 Medium Blue Metallic Z28 A4 (UB-HSTRY's old ride) -- currently broken
'99 Navy Blue Metallic Firehawk #120 M6 (99.44% stock) -- daily driver

 

My 83 HO Z28 has the extra trans mounts... they're basically just biscuit bushings that isolate a small piece that the trans actually sits on, from the rest of the crossmember and frame.

I've only seen the extra weight thing on 4 & 6 cyl cars. I'm not going to make any claims that they came on those only though.

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"So many Mustangs, so little time..."
ICON Motorsports

 

my 85 Z28 LG4 has them, as does the 84 Z28 LG4 I recently bought for parts. But my 84 Firebird LG4 did not have them

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350, Comp 262, Edelbrock Performer intake 600 cfm carb and exhaust, headers
-JVC, Eclipse, Pioneer, MTX, Phoenix Gold, Planet Audio

 

My 82 Z with 4 speed has them.I thought they only came on manual tranny cars but hey.. I could be wrong.

 

Ressurection in progress....anyone know if this can be retrofitted onto a 4th gen? Do thirdgens and 4th Gens share the same bolt holes? Im thinking if I have to run a poly mount, this may help the vibes.

 

my factory V6/700r4 86 had them... i got rid of them by welding the crossmember into one piece..

 

My 83 has them and we know how cheap G.M. was at the time our cars were being built. So I am thinking they would not of put them there if they didn't have to. IMO

 

My 92 had them, so its not just and early year deal. Probably used to eliminate road noise

 

My 88 has them. But who knows if it came with the car. Was an original v6/5 speed but I bought it already swapped to 5.7/700r4.

In hindsight, Im wondering if this is the source of much of my vibration above 70. I think combined with the ES mount, the tailshaft is way too high.

I really am curious as to why these would have been installed.

 

NVH, plain and simple.