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#1
08-07-2017, 02:36 PM
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drive shaft rubbing floor 64 GTO
I searched for the old threads regarding this issue but couldn't find them. My 64 would rub the drive shaft with a passenger in the car so I finally fixed it. Took out the stock height mounting pad (4 speed car) and installed the 1/4" shorter Energy Suspension unit. Worked like a charm, no more rubbing with a passenger or two. I wonder if I could put enough heavy friends in to squish that 1/4" and rub again?
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#2
08-07-2017, 04:59 PM
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What's the dimension of the energy suspension mount ? My stock one (I think original) is about 1.85 inches
I have same problem mostly caused by the driverside frame cross member mounting location bent up pretty severely; I just want to get it driveable so I can get it to a friends house with a lift so we can address that....I cant get enough leverage with it on jackstands to pull it back down |
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#3
08-07-2017, 05:04 PM
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Look up "short" trans mount on Energy Suspension website, they give dimensions
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#4
08-07-2017, 05:21 PM
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Don't know dimension but it was 1/4" shorter then what I took out. I did just find this mount from NAPA BK6201030 suppose to be 1.5" in height.
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#5
08-07-2017, 08:18 PM
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Quote:
Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#6
08-07-2017, 08:51 PM
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3-1158G
is the short mount he is talking about, 1 5/8 tall as apposed to 1-15/16 tall on normal one. BUT could also magnify driveline vibration is said vehicle as we all know this is an issue and usually want to move trans up and not down. http://www.energysuspensionparts.com/3.1158
__________________
64 Lemans hardtop 4spd, buckets |
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#7
08-07-2017, 09:06 PM
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Yes the 31158 is the short mount. Worked great, did not drop trans far enough to make drive line angle incorrect. Move trans up? can't do that the driveshaft was already hitting the floor brace with weight on body. Common problem. Now that rubber mount I posted from NAPA is supposedly 1.5" but I didn't use that one.
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#8
08-07-2017, 09:06 PM
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Quote:
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#9
08-08-2017, 09:35 AM
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I ordered the 3-1158G from Jegs....I'll give it a shot for $33 to help gain a little clearance until I can address my real problem, which is a badly bent-up frame pad on the driverside where the trans crossmember sits.
http://www.energysuspension.com/parts-search.html http://www.jegs.com/webapp/wcs/store...rsistYmm=false |
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#10
08-08-2017, 09:43 AM
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G is in black, R is for red.
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#11
08-08-2017, 09:45 AM
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Quote:
A side note, you can straighten pothole damage on bent rims this way too.
__________________
Brad Yost 1973 T/A (SOLD) 2005 GTO 1984 Grand Prix 100% Pontiacs in my driveway!!! What's in your driveway? If you don't take some of the RACETRACK home with you, Ya got cheated    
Last edited by Sirrotica; 08-08-2017 at 09:53 AM. |
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#12
08-08-2017, 12:01 PM
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I had a driveshaft clearance issue on one of my '65s after an engine/trans swap and some other work.
Ended up solving it by putting a small piece of 2x on top of jack and using it to jack up car where driveshaft was hitting. Ended up pushing up floor pan in that area just enough so it didn't hit anymore. Probably not the 'best' solution, but it worked and didn't cause any other issues. Sent from my iPhone using Tapatalk |
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#13
08-08-2017, 12:02 PM
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The "normal" pad from them is 1 15/16" tall, the short version 1 5/8". Any one know the height of an actual OEM rubber mount?
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#14
08-08-2017, 12:07 PM
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This one from NAPA is supposedly 1.5" tall but I haven't verified that.
https://www.napaonline.com/en/p/BK_6201030 |
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#15
08-09-2017, 01:37 PM
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Quote:
I blame the interference problem on the bodymen who welded in the new floors. They did not maintain the height needed to clear the driveshaft. The shorter rear trans support is a great idea IF driveshaft alignment is not compromised by lowering the rear of the trans. .
__________________
BONESTOCK GOATS '64 GTO Tripower Hardtop (Wife's Car) '64 GTO Tripower Post Coupe (My Car) '99 Bonneville SE Sedan |
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#16
08-09-2017, 04:49 PM
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Thx for all the great ideas (and all the good ones in previous posts). I am going to try the shorter mount; I tried the 2x4 under the tunnel but it seemed that my floor was "flexing" and returned to it's original shape. Itit's got a bunch of crinkles in it from some previous BFH strikes and a gaping oversized hole under the shifter porch from old mods so I think I'm trying to leave my floor alone.....for now
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#17
08-09-2017, 05:16 PM
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Quote:
This might put it in the correct Yoke Position centerline just a bit farther back now (due to Nash Trans trans mount location Like a Turbo 400 Trans tail stock. Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#18
08-09-2017, 07:10 PM
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Maybe you could remove the rubber insulators at the end of each side of the trans crossmember where it bolts to the frame? Didn't later year gto's eliminate them all together?
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#19
08-09-2017, 07:42 PM
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Quote:
There's probably a few things one can do but if installing a 1/4" shorter pad works then why do all the Rube Goldberg things? |
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#20
08-09-2017, 08:39 PM
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I have seen the rubber isolators on most 64-67 GTOs and always on Convertibles which is all I have owned and actually worked on. Convertibles are pretty filmsy on the frame structure as is without the steel roof and if you put a Bolt On solid frame crossmember in place on the car vs the isolator mount system, you could very well break the transmission crossmember ear off the solid part.
Nope, I am not jerry rigging anything on a convertible chassis. Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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