Front Diff Mount Prototype
Front Diff Mount Prototype
Finally had a bit of time to work on some development projects. First on the short list was a replacement for the front diff mount seeing as how mine needs replacing.
All in all I'm very happy with the results. The polyurethane bushings were a bit challenging to make due to their relatively small size, but ended up better then I expected. I still need to set up a jig to check the dimensions but it should only take minor tweaking to get it perfect.
One of the largest challenges was to make sure that the mount properly isolated the diff from the subframe. If the mount isn't designed right, then when you accel/decel quickly the mount can clunk. When I get time I'll try to remember to post a cross section of the mount so everyone can see what I'm talking about.
It's still missing some washers and the bolts for the subframe but I don't have anything the right size in stock at the moment.
All in all I'm very happy with the results. The polyurethane bushings were a bit challenging to make due to their relatively small size, but ended up better then I expected. I still need to set up a jig to check the dimensions but it should only take minor tweaking to get it perfect.
One of the largest challenges was to make sure that the mount properly isolated the diff from the subframe. If the mount isn't designed right, then when you accel/decel quickly the mount can clunk. When I get time I'll try to remember to post a cross section of the mount so everyone can see what I'm talking about.
It's still missing some washers and the bolts for the subframe but I don't have anything the right size in stock at the moment.
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Been swamped catching up on some parts we have started to run low on. My goal for this weekend is to finally get some work done on my FC, which if it goes well includes fitting the prototype finally.
I will be watching this thread! Ive got literally every bushing bought for my rear emd cept the diff mount.
looks nice but you may want to test it before selling them.
i have seen enough force on the diff nose to shear off the whole thick steel plate mount tab from the subframe. call me skeptical but i see too many wear angles and not enough load bearing surface on the actual mount. i did think the other design would work that was posted up before where the pucks took on direct load instead of transferring it as a torsional load. i just envision it may be rather solid feeling at first but it will wear quickly until the point where the bolts are doing the work and either wear out the aluminum body or shear the bolts off.
hopefully you take no offense, the materials and machining look good.
i have seen enough force on the diff nose to shear off the whole thick steel plate mount tab from the subframe. call me skeptical but i see too many wear angles and not enough load bearing surface on the actual mount. i did think the other design would work that was posted up before where the pucks took on direct load instead of transferring it as a torsional load. i just envision it may be rather solid feeling at first but it will wear quickly until the point where the bolts are doing the work and either wear out the aluminum body or shear the bolts off.
hopefully you take no offense, the materials and machining look good.
Last edited by RotaryEvolution; May 28, 2012 at 02:40 PM.
^I also worry about this design.
The sheering force is always the issue with our stock mount. The bonded rubber was a serious weak point.
I liked that sandwich style that fell through with the AZ guy. It turned the upward force into compression instead of sheering.
The sheering force is always the issue with our stock mount. The bonded rubber was a serious weak point.
I liked that sandwich style that fell through with the AZ guy. It turned the upward force into compression instead of sheering.
looks nice but you may want to test it before selling them.
i have seen enough force on the diff nose to shear off the whole thick steel plate mount tab from the subframe. call me skeptical but i see too many wear angles and not enough load bearing surface on the actual mount. i did think the other design would work that was posted up before where the pucks took on direct load instead of transferring it as a torsional load. i just envision it may be rather solid feeling at first but it will wear quickly until the point where the bolts are doing the work and either wear out the aluminum body or shear the bolts off.
hopefully you take no offense, the materials and machining look good.
i have seen enough force on the diff nose to shear off the whole thick steel plate mount tab from the subframe. call me skeptical but i see too many wear angles and not enough load bearing surface on the actual mount. i did think the other design would work that was posted up before where the pucks took on direct load instead of transferring it as a torsional load. i just envision it may be rather solid feeling at first but it will wear quickly until the point where the bolts are doing the work and either wear out the aluminum body or shear the bolts off.
hopefully you take no offense, the materials and machining look good.
I've included a cross section of the mount so everyone can see how the bushings isolate the plates from each other. One of my primary concerns besides durability, is making sure it doesn't "clunk" under heavy loads. I know I'd personally be very angry if I went through the trouble of installing a diff mount, and it made a unpleasant noise every time I launched hard or was on/off the throttle quickly.
Me too
