Bamato

iTrader: (6)

Anyone just weld their broken front diff mounts and make them solid? Bad idea? Good idea? Obviously its going to transfer more noise...

Bamato

iTrader: (6)

Read a bit more. Seems like a bad idea. Metal fatigue is not your friend...

dwb87

iTrader: (22)

Flex is necessary.

Install a new front differential mount, along with a pinion snubber. Problem solved.

How to: Pinion Snubber Install

https://www.rx7club.com/showthread.p...Pinion+snubber
Good reference pics. ^

Landon303

iTrader: (25)

Mine broke & was welded (previous owner). Definitely a bad idea

John631

iTrader: (2)

It hasent been said yet but its fine to do if you have solid diff and subframe mounts... and it wouldnt be a bad idea to run a bead along the sides where the dif mount mounts to the subframe that seems to be the weak spot... so in conclusion its fine with solid mounts

beefhole

iTrader: (29)

I used to hear a thump I figured it was the rear diff mount, so when I went to install a "new" one I noticed this. Previous owner welded a long, bent bolt to the mount and then to the subframe. This can't be good...


it also turns out the thumping I was hearing was a bad trans mount. My thump is gone but what about this odd welded bolt?

Landon303

iTrader: (25)

haha that looks like a rotary engine tension bolt!

RotaryEvolution

iTrader: (30)

some drifters do similar to keep the diff mount from constantly ripping, but i can't envision that bolt lasting indefinitely.

beefhole

iTrader: (29)

I plan to track the car (not drifting) should I cut it?

RotaryEvolution

iTrader: (30)

i would, it's going to eventually break anyways. install a pinion snubber and be sure the mount is in decent condition.

MaczPayne

iTrader: (5)

Running new rear diff mounts (the ones that press into the 'ears') will help reduce the energy transferred to the front diff mount. Running delrin mounts in the ears will reduce it even further.

The only downside is those that have the center camber adjusting link will find it useless since flex is nearly eliminated by the delrin mounts.

RotaryEvolution

iTrader: (30)

meh, the competition mount and snubber is fine for moderate to even highly abused cars, launches and snap traction are what generally kill the subframe mount ears before that gives it up.

BLUE TII

iTrader: (9)

+1 pinion snubber!

Cut the threads short and droop the subframe- easy. There is even a divot to tell you where to drill on the body.

Bamato

iTrader: (6)

I had already planned on doing the pinion snubber.

I'm still interested in trying the semi-solid mounts that (Brandon?) is making, but have had little contact with him :-/.

dwb87

iTrader: (22)

Yeah, I think Br4and0n is in Mesa... Or at least somewhere around there.

I'm interested to see how one of his mounts holds up.