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T5 vs. AW71

sloopy said:
The center support bearing is already isolated by a big rubber donut. Are you saying you added additional isolation between the center support bearing bracket and the frame? I don't see how that would help.
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I think they are referring to the actual transmission mount crossmember. The M47 one has oversized holes wherein you install rubber bushings.
 
VB242 said:
I've said this in other threads, if you can isolate the cross member better the T5 nvh goes away. I used an M47 cross member and added 1/4" thick rubber shims to between the cm and the body.
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I did it. Helped, but not much in my case.
 
spock345 said:
That M47 cross member with a plate welded to it seems like the best option.

What do you know? They used rubber in places for a reason.
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I don't doubt it. Had that crossmember for a bit, but my exhaust clearance situation is not ideal with it.
 
GeorgiaTechFan12 said:
So just drove my fresh T5 swap for the first time last night. I did not experience any dash rattling or vibrations that made me question the swap at all. It was great to drive with the exception of my needing to figure out my shifter bezel. I did get a slight vibration in the shift knob around 2,700 rpm on deacceleration. This seemed to be nothing like what everyone has reported that drives them crazy.

I tried to use as much rubber as possible
  • STS lighted flywheel
  • Yoshifab Stage 2 clutch/pp
  • Yoshifab rubber t5 mount
  • Yoshifab 2 Piece front driveshaft
  • Yoshifab T5 crossmember
    • May change this out for the STS one as my T5 output shaft doesn't line up 100% straight on with the center carrier
    • Driveline angles were pretty spot on with this, -1 degree on trans and +1 degree on carrier
  • Volvo rubber center carrier bushing
  • 3 sheets of 1/4 50 durometer rubber sandwiched in between the crossmember and frame rails
  • Stock rubber rear suspension
  • Refreshed T5z with deeworks adapter kit
The t5 swap definitely added some NVH, but I think a lot of it is coming from the fact the I'm trying to shift higher than the auto the T5 replaced.

I may play around with cross member and angles, but so far very happy with the swap.
Click to expand...
Are you using sleeves on the cross member hardware so they achieve proper torque? Notice that the M47 cross member donuts have a sleeve in them.
 
GeorgiaTechFan12 said:
So just drove my fresh T5 swap for the first time last night. I did not experience any dash rattling or vibrations that made me question the swap at all. It was great to drive with the exception of my needing to figure out my shifter bezel. I did get a slight vibration in the shift knob around 2,700 rpm on deacceleration. This seemed to be nothing like what everyone has reported that drives them crazy.

I tried to use as much rubber as possible
  • STS lighted flywheel
  • Yoshifab Stage 2 clutch/pp
  • Yoshifab rubber t5 mount
  • Yoshifab 2 Piece front driveshaft
  • Yoshifab T5 crossmember
    • May change this out for the STS one as my T5 output shaft doesn't line up 100% straight on with the center carrier
    • Driveline angles were pretty spot on with this, -1 degree on trans and +1 degree on carrier
  • Volvo rubber center carrier bushing
  • 3 sheets of 1/4 50 durometer rubber sandwiched in between the crossmember and frame rails
  • Stock rubber rear suspension
  • Refreshed T5z with deeworks adapter kit
The t5 swap definitely added some NVH, but I think a lot of it is coming from the fact the I'm trying to shift higher than the auto the T5 replaced.

I may play around with cross member and angles, but so far very happy with the swap.
Click to expand...

Where did you get the T5Z from, which car did it come out of and what input shaft did you have to put in it?
 
hessam69 said:
Where did you get the T5Z from, which car did it come out of and what input shaft did you have to put in it?
Click to expand...
So T5zs never came in a production car. They were Tremecs aftermarket "upgraded" T5 after they bought it from Borg Warner. The guy I got mine off of bout it a couple years from Summit racing. I got pretty lucky as they are harder to find second hand.

Mine has the standard Foxbody style input shaft, so worked great with the Deeworks adapter kit and just a M47 style throw out bearing setup.

2manyturbos said:
Are you using sleeves on the cross member hardware so they achieve proper torque? Notice that the M47 cross member donuts have a sleeve in them.
Click to expand...
So this is definitely something I need to change about my current install.
I'm going to try out some 6061 aluminum for crossmember to frame spacers and then something like these, for an OEM like rubber isolation.
 
NVH ? I've done a lot of engine, trans, and fab work, built race cars, made parts from scratch. Was hired to restore a racecar that they made one of, that took 3 years from a bare shell to a finished car,[A story in itself]. Retired now after 53 years of working on cars. I guess I'm a little behind the times as to what NVH means.
 
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