[MIDSHIP89]

I’m swapping out the S54 trans for an E153 finally, 8 years post gen4 swap. I noticed the rear bracket from the S54 doesn’t bolt up to the E153, so I’ll have to get that bracket. But what about the rubber side?

Are the front mount parts compatible? The bolt holes line up from the bracket to the transmission, but will there be an alignment issue with S54 hardware on the front of the E153?

 

[JimKing]

The U-shaped bracket that bolts to the front of the transmission is the same part number NA or turbo.

The front and rear chassis side mounts (with the rubber in them) are different part numbers, but I think the only difference is the amount of rubber in the mount - the turbo mounts are more fully filled to provide better torque damping. So try your NA mounts on the front. If they don't line up, then you'll know the difference between the turbo and NA chassis side mounts is more than just the rubber insert.

 

[MIDSHIP89]

The U-shaped bracket that bolts to the front of the transmission is the same part number NA or turbo.

The front and rear chassis side mounts (with the rubber in them) are different part numbers, but I think the only difference is the amount of rubber in the mount - the turbo mounts are more fully filled to provide better torque damping. So try your NA mounts on the front. If they don't line up, then you'll know the difference between the turbo and NA chassis side mounts is more than just the rubber insert.

Im trying to avoid finding out when I’m installing it, but that's encouraging information. I ordered poly inserts for NA mount, so I’m really hoping I can keep the chassis side parts. They do specify NA/turbo for the poly inserts, like they’re different diameters or something.

 

[JimKing]

The drop-in inserts that Kirkosarus used to sell - they just filled the air gaps in the OEM rubber - were different because the NA and turbo had different amounts of rubber.
What kind of inserts are you thinking of? I thought the only ones available now are ones that fully replace the OEM rubber part and the metal bushing.

 

[tabKola]

Rear rubber mounts are different between S54 and E153 as are the brackets. Left side rubber is different but they are interchangeable. Left side brackets are different. Front rubber mounts are different but interchangeable. Front brackets are the same.

 

[MIDSHIP89]

The drop-in inserts that Kirkosarus used to sell - they just filled the air gaps in the OEM rubber - were different because the NA and turbo had different amounts of rubber.
What kind of inserts are you thinking of? I thought the only ones available now are ones that fully replace the OEM rubber part and the metal bushing.

These are what I got

Engine Poly Mount Inserts

Speed Source Engine Poly Motor Mounts. Are your motor mounts all worn out and split? If so, install these poly engine mounts inserts which fully replace the old rubber. These mounts will replace the front and rear engine mounts. PLEASE NOTE: You need to order the mount inserts based on the...

primemr2.com

 

[JimKing]

Those are ones "which fully replace the old rubber." Expect more NVH transmitted into the chassis.

 

[02341360]

I use a front turbo mount and front s54 bracket with my s54 if that helps. The rears are visually obviously different side by side.

 

[mingtauw]

Curious as to why you're swapping out the S54.

Sent from my SM-G973U using Tapatalk

 

[Jeromesr]

I’m swapping out the S54 trans for an E153 finally, 8 years post gen4 swap. I noticed the rear bracket from the S54 doesn’t bolt up to the E153, so I’ll have to get that bracket. But what about the rubber side?

Are the front mount parts compatible? The bolt holes line up from the bracket to the transmission, but will there be an alignment issue with S54 hardware on the front of the E153?

Give it a try. It might fit. Good luck.

 

[ztarchitecht]

The U-shaped bracket that bolts to the front of the transmission is the same part number NA or turbo.

The front and rear chassis side mounts (with the rubber in them) are different part numbers, but I think the only difference is the amount of rubber in the mount - the turbo mounts are more fully filled to provide better torque damping. So try your NA mounts on the front. If they don't line up, then you'll know the difference between the turbo and NA chassis side mounts is more than just the rubber insert.

rear mount the bolt hole sits about 6mm higher on the turbo than the NA

 

[MIDSHIP89]

Those are ones "which fully replace the old rubber." Expect more NVH transmitted into the chassis.

Yes I’m prepared for that. Soft/worn NA mounts with my gen4 swap have caused enough damage lol chewed up the flex section on the down pipe and broke a mounting tab off the intercooler. I’ll also be adding an X brace, so I’d like to avoid as much unnecessary movement as possible.