Hey new to the scene here
- Thread starter BubbaFJ40
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- Thread starter
- #42
Big plans, did you buy the FJ40 or did they give it to you ?
He gave it to me
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- #43
Next question would be is it worth trying to build up the fj40 axles or should I just buy custom built ones front and rear sonce I'm running such a heavy engine?
- Thread starter
- #44
Bump
IMO the stock axles are plenty strong ... Rebuild is straight forward ... Throw some disc brakes on them and put your $$ in other stuff instead IMHO
Somebody might have a different opinion
Somebody might have a different opinion
- Thread starter
- #47
The only reason Im nervous about that is the fact that the motor and frame are going to be a lot heavier than the stock components. Plus I'm making it like a rolling tank. Would like to link the front and rear and put it on at least 35s with lockers of some sort. Still unsure about how to figure out gearing. The other thing I'd like to do is widen the footprint a little to make it more stable. Not sure about extending the body, I've noticed a lot of you have done this but not everyone. What are the big advantages to doing that?
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- Thread starter
- #49
What kind of financial bind will that put me in? Can you coil over links?
Here's a site you will enjoy, and find very helpful. http://www.grimmjeeper.com/gears.html You can see two different sets of gearing side by side and compare them.
Don
- Thread starter
- #51
That's insane. But I'm still not sure if I did it right. Nv5600 trans, atlas 2 tcase, and 3.83 gears so it can be my dd. At 6k rpm in 6th it says it'll top out at 224mph lmfao
at 6K it says my cruiser can go 144 mph LOL
mostly stock all with 33" tires
at 5K (more realistlic) I can go 120 MPH .... still LOL
mostly stock all with 33" tires
at 5K (more realistlic) I can go 120 MPH .... still LOL
- Thread starter
- #53
It doesn't have a place to plug in your engine though. What do most people run on an entry level build?
The Grimm Jeeper site doesn't have any motors listed. I'm guessing that is because there are far too many different motors, versions of each motor, etc, to be able to list them all. Each transmission, transfer case, and rear end has specific gearing. If you are planning to use more custom gearing you have the option to input that gearing. With motors there are just too many variables.
Before you go very far with that site you need to know what the torque curve of your motor is (the RPM where it runs most efficiently), what your normal highway speeds are, or what other kind of use there will be if that will be more than highway use. Does your motor have good low end torque, or does it run better at higher RPM's, etc. Just what is the full RPM range you expect to normally use? This is especially important to know for diesels as they will run better, more economically, within the top of the torque curve. I'm not as familiar with how the torque curve effects a gasser motor, and it's optimum RPM range. Maybe someone more familiar with that question can chime in on that.
Don
,
Before you go very far with that site you need to know what the torque curve of your motor is (the RPM where it runs most efficiently), what your normal highway speeds are, or what other kind of use there will be if that will be more than highway use. Does your motor have good low end torque, or does it run better at higher RPM's, etc. Just what is the full RPM range you expect to normally use? This is especially important to know for diesels as they will run better, more economically, within the top of the torque curve. I'm not as familiar with how the torque curve effects a gasser motor, and it's optimum RPM range. Maybe someone more familiar with that question can chime in on that.
Don
,
- Thread starter
- #55
Dude I've learned so much since coming to this site it's freaking insane.
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I can't answer the first one, but I believe you can coil over links, though I know very little about from-scratch suspension set-ups.
Anyway, this is IMHO, the definitive thread about 80 series suspension under a 40...
https://forum.ih8mud.com/threads/re...-40-series-axles-with-80-series-coils.173333/
- Thread starter
- #57
Is there a way to figure out how to link a suspension, or figure out axle travel, or what type of cool overs to use?
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I can't help there, maybe some of the guys from the hardcore section might be able to.
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- #59
I appreciate the help nonetheless. I'm hoping that after my wedding I'll be able to buy a welder (looking at a synchrowave 2xx) and get the 40 in my garage instead of my mom's and commence tear down. Is there anything wrong with trying to fix the rust holes that I have in doors and stuff or should I scrap them and get new?
Don't scrap anything if you have the room to store stuff. There is always someone that needs a piece or you might later.