Builds FlatRok40 build (2 Viewers)

[GLTHFJ60]

I think rigid will be just fine. That's how the mini's and 4Runners are set up. I'll try to post some pics of the skid plate I'm building so you can have some ideas. Here's a link till then.

https://forum.ih8mud.com/40-55-series-tech/434416-skid-plate-ideas-pictures.html

If the motor mounts aren't rigid then I thought the tranny crossmember shouldn't be rigid either. Think about it, if the motor is allowed to flex its mount but the transmission isn't, then either the transmission or transfercase will be stressed and could crack.

At least that's what I thought...

 

[fjfodee]

If the motor mounts aren't rigid then I thought the tranny crossmember shouldn't be rigid either. Think about it, if the motor is allowed to flex its mount but the transmission isn't, then either the transmission or transfercase will be stressed and could crack.

At least that's what I thought...

He's using a mini truck T-case mount.

 

[chicago]

If the motor mounts aren't rigid then I thought the tranny crossmember shouldn't be rigid either. Think about it, if the motor is allowed to flex its mount but the transmission isn't, then either the transmission or transfercase will be stressed and could crack.

At least that's what I thought...

This is what I had read and is how I set mine up on this premise. Used the AA mount on the motor and a energy suspension flat trans mount for the t case/ x member mount.

 

[chicago]

If going through the frame it's best to sleeve it.

 

[GLTHFJ60]

He's using a mini truck T-case mount.

I understand that. That doesn't make my thoughts any different. Chicago confirmed that I'm not making it up. Besides, a V8 makes a hell of a lot more power than a 22RE or a 3RZ for that matter.

 

[brokenparts]

yes, it is also important to try to use the same mount material. If the motor mounts are rubber then the tranny/transfer case mounts should also be rubber. Some people get away with mixing poly and rubber mounts but it is not recommended. Another ast rule of thumb is that it is better to mount bushings/mounts under the trans/transfer than at the frame unless the frame is very very rigid.

my 2cents....

 

[jefishing]

This is the toybox mount that I am using. The motor mounts are rubber and these are poly. I was thinking that the crossmember should be mounted rigid since there is movement in the bushing. Those crossmembers are nice, thanks for the link.

 

[fjfodee]

Exactly what I was saying. The mount is not rigid.

It will only be rigid at the framerails.

 

[GLTHFJ60]

Exactly what I was saying. The mount is not rigid.

It will only be rigid at the framerails.

Yup, got that now;p For some reason I equated "mini cross member" to mean that it bolted directly to the frame rails and the transfer case.

 

[fjfodee]

Here are some pics of my skid plate. It's not finished, but...
I used 3/4 bolts and sleeved the frame.
1/4 angle for the bottom and inside of the framerails. (sits on the rivets on the bottom of the frame).
The main flat plate is 1/4, and the part that hangs down is 3/8.

 

[fjfodee]

Some more....





The idea here is to have a type of support attached to the frame, something like a driveshaft support bearing, with a short straight shaft coming from the front output to the support. Then the normal driveshaft from there down to the 3rd. I'm trying to keep the front and rear shafts the same length (only have to carry 1 spare).

 

[GLTHFJ60]

That skid plate is mega sexy.

 

[jefishing]

Man that thing is nice. My case sits down farther than that. I belive it sits about 3" below the frame. I spent quite awhile in the shop last night and think I have one figured out. It will not be a full skid plate just a mount for the case. I took Chicago's advise and did'nt hang it from the bottom of the frame which was a good idea. I had to 45 up the ends and attached to a piece of angle. The ps side suched bad they just is not room. Here is a pic of it so far needs cleaned up and the mount will be bolted through the bottom its just tached for position.

 

[fjfodee]

Looking good!

 

[brokenparts]

looks good!

 

[chicago]

Man that thing is nice. My case sits down farther than that. I belive it sits about 3" below the frame. I spent quite awhile in the shop last night and think I have one figured out. It will not be a full skid plate just a mount for the case. I took Chicago's advise and did'nt hang it from the bottom of the frame which was a good idea. I had to 45 up the ends and attached to a piece of angle. The ps side suched bad they just is not room. Here is a pic of it so far needs cleaned up and the mount will be bolted through the bottom its just tached for position.

NNNNNIIIIZZZE!
I think youll be glad that youre keeping the frame rail clear as possible. In the past I had tried to get away with NOT taking that advice and folks here set me straight to do it better.
That is why its nice to do a build thread...mudders will keep you honest and spend LOTS of your money for you.;p

 

[jefishing]

Thanks guys it should work out okay I think. A build thread is nice you get to see various ideas and what to do or not to do. I have no cruiser guys around here so this is the place I learn everthing from. Chicago I have read your thread a ton of times. You can find most everthing in there. It really is alot of fun spending other peoples money.

 

[jefishing]

my computer took a dump on me so all I have is my phone to search with and it sucks. Cant let that get in the way of progress so I am starting the rear SOA and have some questions. I am using the old stock mounts and cutting the rear hanger and flippin it 180. Can I just set the housing on stands and line it up or do I need to put the axle all back together. Not setting pinion angle yet. How far should the hangers be apart center to center about so I have some sort of an idea. YOu do the rear firt right. Any tips to make this go good. Thanks if the typing sucks sorry only see part of the screen. It's going to be a long week with computer. Thanks

 

[chicago]

my computer took a dump on me so all I have is my phone to search with and it sucks. Cant let that get in the way of progress so I am starting the rear SOA and have some questions. I am using the old stock mounts and cutting the rear hanger and flippin it 180. Can I just set the housing on stands and line it up or do I need to put the axle all back together. Not setting pinion angle yet. How far should the hangers be apart center to center about so I have some sort of an idea. YOu do the rear firt right. Any tips to make this go good. Thanks if the typing sucks sorry only see part of the screen. It's going to be a long week with computer. Thanks

All you need is the housing set up, but make sure its centered. As far as the perch width...did you do a 60 series axle or a 40 axle? The springs need to be centered with the perches, or vice versa.

Donno if that helps or not.

 

[jefishing]

yea I went with 60 housings. I was having a problem setting the rear shackle angle. I thought I could rotate the rear hanger but the shackle bar hit the hanger. % ended up measuring 44.5 from center hanger to center hanger. I have about 36 degree on dr and 39 degree on ppass. It took me forever to get that far. I sure there is a way to set it up besides guessing and reguessing. Does anybody have a good way to figure the angle? I am going to try and tackle the front tomorrow so I know how long to make rear hanger. I will set front and adjust rear to level it out. Sound right