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Old February 20th, 2014, 12:14 PM   #861
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What is this crazzieness about separation at the trans mount?
Long story short, you need to use a single bushing in the center with rigid mounts at the frame, not a crossmember ridgid mounted to the trans with bushings on the outer ends where it mounts to the frame. Outboarded bushings put lots of stress on important things like the transmission case.
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Old February 20th, 2014, 12:15 PM   #862
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Roger. Never knew that.

:)

Sent from my Galaxy S4
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Old February 20th, 2014, 12:57 PM   #863
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Long story short, you need to use a single bushing in the center with rigid mounts at the frame, not a crossmember ridgid mounted to the trans with bushings on the outer ends where it mounts to the frame. Outboarded bushings put lots of stress on important things like the transmission case.
In this case, his engine is mounted damn near rigid so the center bushing will allow more twist than the engine itself. The idea is for them to be able to twist together so one is not fighting the other.
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Old February 20th, 2014, 01:54 PM   #864
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In this case, his engine is mounted damn near rigid so the center bushing will allow more twist than the engine itself. The idea is for them to be able to twist together so one is not fighting the other.
3 points form a plane, 4 points add an extra constraint that will in turn add extra stress where it's not intended. The motor mounts are there to prevent twist, the trans mount is there to support it along the length of the vehicle, just like every stock application.
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Old February 20th, 2014, 02:01 PM   #865
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3 points form a plane, 4 points add an extra constraint that will in turn add extra stress where it's not intended. The motor mounts are there to prevent twist, the trans mount is there to support it along the length of the vehicle, just like every stock application.
Thanks for the lesson. If the engine doesn't move but the back end is allowed to move where does the twist end up?
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Old February 20th, 2014, 02:30 PM   #866
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Thanks for the lesson. If the engine doesn't move but the back end is allowed to move where does the twist end up?
The engine will still move, so will everything else unless you hard mount it all and prevent any chassis twist. There will always be stress on these parts and will pretty much always be movement. Will it fail catastrophically by mounting the trans bushings outboard? Probably not. Will it add unnecessary stress to the system? Yep. That's the only point I'm trying to make. It can work fine and has for many people, but it's not the "right" way to do it.
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Old February 20th, 2014, 02:37 PM   #867
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The engine will still move, so will everything else unless you hard mount it all and prevent any chassis twist. There will always be stress on these parts and will pretty much always be movement. Will it fail catastrophically by mounting the trans bushings outboard? Probably not. Will it add unnecessary stress to the system? Yep. That's the only point I'm trying to make. It can work fine and has for many people, but it's not the "right" way to do it.
I don't disagree with what your saying, all I'm saying is that he's running poly bushings 14" or so away from the engine, that bitch isn't going to move.
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Old February 20th, 2014, 02:46 PM   #868
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From what I've seen of Beefy's driving, EVERYTHING moves
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Old February 20th, 2014, 02:47 PM   #869
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From what I've seen of Beefy's driving, EVERYTHING moves
I can't wait to actually get some real travel outta the shocks I got from you.

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Old February 20th, 2014, 03:39 PM   #870
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From what I've seen of Beefy's driving, EVERYTHING BREAKS
fixered
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Old February 20th, 2014, 05:15 PM   #871
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His motor mount bolts at the block are in double sheer.
This is unlike what most of us are used to seeing on our projects.
There is a huge boss on the block the bolts pass though and the mount straddles this boss.
I am not sure his original design is that bad.
I would put the frame end mounting points inside the frame if it was me.
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Old February 20th, 2014, 05:52 PM   #872
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You should just build a buggy. No one would gripe at you then.
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Old February 20th, 2014, 05:52 PM   #873
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sounds like a part out
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Old February 20th, 2014, 06:18 PM   #874
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FWIW, the engine in my truggy used solid mounts to the frame. I then made cross braces between the frame rails under the trans and t-case. I then used a factory style rubber trans mount and used a poly bushing at the t-case. Transmission and t-case mounts were as close to the center line of the power train as possible so they were a supporting pivot point. Worked great for my rig, I also had the frame rails boxed. My cross members were bolt in at the frame, but were rigid mounted and both ends of the frame had welded rectangular tubing instead of the factory riveted style. The frame was very rigid.
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Old February 20th, 2014, 07:53 PM   #875
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sounds like a part out
I'll take what's left of the cab...
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Old February 21st, 2014, 07:12 AM   #876
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Got nothing done on it last night

But the diesel is fixed
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Old February 21st, 2014, 07:37 AM   #877
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buy a rzr
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Old February 21st, 2014, 07:45 AM   #878
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That's my plan
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every circle needs a pivot man
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Old February 21st, 2014, 08:03 AM   #879
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I like golf carts
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Old February 21st, 2014, 08:03 AM   #880
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With roll cages
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