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'82 Brat: Solid Axle Build *** DONE! :) ***


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457 replies to this topic

#101 bratman18

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Posted 29 January 2009 - 12:21 PM

Those tires are huge!!!! That's gonna be insane on a Brat! Can't wait to see it when it's done, and in action. So does that mean the rear is being held up by itself now?

#102 BlueJeep

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Posted 29 January 2009 - 12:28 PM

Yes, if I push down on the rear it will bounce (no shocks yet). The tire used for mock up is a Q78-15 Swamper on a very bent beadlocked rim, so not that huge (35").:)

This should be very streetworthy when it's done, there's no reason it shouldn't be. With 8 degrees of caster and the link angles that are built into it the drive should actually be pretty good. The increased width will help with the added height, and the almost 10" stretch on the wheelbase will make it more stable on rough roads. Tires have a lot to do with it, and with the BFG's it will do fine....but it won't be a sports car.... :)

#103 bratman18

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Posted 29 January 2009 - 12:32 PM

Sweet! The tires are HUGE for a Brat or any subaru for that matter! You have tom remember that the stock tire is a 185 70 13! So having a 35 inch tire is insane!! Hopefully the gearing will work really well with the amount power it puts out. If so than it should drive ok. Cool project

#104 BlueJeep

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Posted 29 January 2009 - 12:43 PM

Yeah, I know. When Mick rolled into the shop he had 5" of lift to clear the 27" SSR's.

Mick has calculated the final ratios, and taking into account everything except the increased weight, it should be comparable to the original brat gearing on 23's in street mode. The really good thing about the way he chose his parts, is that there are countless options of things he can upgrade if he needs to. Transfer case gears all the way down to 8:1, ring and pinion gears down to 5.xx:1. His only limitation will be the number of RPM's his engine can take...:banana:

#105 bratman18

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Posted 29 January 2009 - 12:45 PM

Yeah that's cool and very smart! If he ever need more gearing, he can just swap out a few parts!!!!! I'm jealous!:grin:

#106 monstaru

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Posted 29 January 2009 - 12:52 PM

yep, its all gearing.the monster crawlers are even utilizing four bangers now sometimes.granted, they are "built" 4 bangers,but none the less.....if those zookies you see at the ORV park are able to get around like that on 35's i see noo reaso0n why the brat should not.cheers, brain

#107 VaporTrail

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Posted 29 January 2009 - 01:00 PM

You mentioned earlier that this will be on/off road rig. Think it'll still be freeway legal...what kinda top speed you hoping for? Amazing build, guys!!!


Top Speed? yeah right :) even with the 27's I always drove it floored...

really no idea what it will be :) if I can get the sammy speedo cable to work on my speedo, then I'll do some test with GPS, and make a new dial to register the right speed....

#108 SoobieDoo

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Posted 29 January 2009 - 01:16 PM

Top Speed? yeah right :) even with the 27's I always drove it floored...

really no idea what it will be :) if I can get the sammy speedo cable to work on my speedo, then I'll do some test with GPS, and make a new dial to register the right speed....


Kinda what I figured. Here in Wa, freeway speed is 70 in spots, which I think my weberized EA82 can [I]just[I] manage with 27's. Yours won't need roads at all! :banana:

#109 bheinen74

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Posted 29 January 2009 - 02:22 PM

something tells me McBrat's rig will end up in some magazine article.

#110 Numbchux

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Posted 29 January 2009 - 02:38 PM

yep, its all gearing.the monster crawlers are even utilizing four bangers now sometimes


oh yea, seen a couple '80s Toyotas up at the ORV park here in MN crawling with stock motors and 200+:1 crawl ratios. it's something else to see a rig going to through some gnarly rock crawl with his left foot hanging out the door (gearing is so low....don't even need to touch the clutch pedal).

#111 VaporTrail

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Posted 30 January 2009 - 11:53 AM

Sweet! The tires are HUGE for a Brat or any subaru for that matter! You have tom remember that the stock tire is a 185 70 13! So having a 35 inch tire is insane!! Hopefully the gearing will work really well with the amount power it puts out. If so than it should drive ok. Cool project


in looking at the gear calcs, when going from a 23" tire to a 35" tire, with original 3.9 gearing, the new gears needed to make up for the tire size would be 5.935...

with the new 4.10 axles, and the sammy high range reduction of 1.409:1, it takes me to equiv of 5.777 gears. and that's still running the soob in high range.

#112 bratman18

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Posted 30 January 2009 - 11:54 AM

in looking at the gear calcs, when going from a 23" tire to a 35" tire, with original 3.9 gearing, the new gears needed to make up for the tire size would be 5.935...

with the new 4.10 axles, and the sammy high range reduction of 1.409:1, it takes me to equiv of 5.777 gears. and that's still running the soob in high range.


Sweet! So with it in lo range it will be well below the stock gearing. It should go quite nicely

#113 VaporTrail

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Posted 31 January 2009 - 12:44 AM

got some additional shots tonight...

t-case/cradle and TT disconnect
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Rear axle
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steering
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front
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tire shots
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#114 brumbyrunner

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Posted 31 January 2009 - 03:01 AM

Great pics.
Whats the TT disconect? Is it an aftermarket rear drive disconnect or something? Why? Front digs?
Like what you've done with the lower links on the rear axle. Nice and clean instead of hanging down. Not a lot of leverage but should be fine with your HP.
Also like what you've done with the engine crossmember. Cleaned up that area nicely. Radius plates gone cleans it up even more.
Great work.

#115 Scott in Bellingham

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Posted 31 January 2009 - 07:29 AM

I want one!

#116 VaporTrail

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Posted 31 January 2009 - 10:25 AM

and there's actually a bolt on piece! the rear upper spring mounts bolted right into one of the diff hanger holes. (rearward one I assume)

#117 3eyedwagon

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Posted 31 January 2009 - 10:49 AM

Is that all dual shield?

#118 TeamCF

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Posted 31 January 2009 - 04:51 PM

:slobber: :slobber: :slobber: :slobber:
(wait, there is not enough drool in the world to cover this build)

I can't wait to see a shot of this on the trails. :)

#119 VaporTrail

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Posted 03 February 2009 - 10:20 AM

I missed a pic....

Posted Image

#120 BlueJeep

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Posted 03 February 2009 - 10:58 AM

All welding to-date has been MIG with 75/25 gas and .035 wire on the tubing and brackets, and .023 wire where sheetmetal was involved. Once it is determined how much oil pan mods are needed, any work there will be done with the TIG.

#121 kodiak1232003

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Posted 03 February 2009 - 11:28 AM

hi,
could you explain the rear drive disconnect? is that to be able to use the brat in FWD like stock?

To further clarify, is that what my 81GL does? the tranny has axles on the front that drive it 95% of the time. When i shift into 4wd it engages the rear axle...is that all correct?

are you duplicating the same thing, but doing it AFTER the sammy box?


thanks,
Brian

p.s. I really love this build and would consider it for my GL. good stuff.

#122 VaporTrail

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Posted 03 February 2009 - 11:38 AM

hi,
could you explain the rear drive disconnect? is that to be able to use the brat in FWD like stock?

To further clarify, is that what my 81GL does? the tranny has axles on the front that drive it 95% of the time. When i shift into 4wd it engages the rear axle...is that all correct?

are you duplicating the same thing, but doing it AFTER the sammy box?


thanks,
Brian

p.s. I really love this build and would consider it for my GL. good stuff.


Yes, it disconnects the rear driveshaft from the t-case, which would in effect make it able to be driven in front wheel drive, just like a stock Brat, but with all the gearing options....

http://www.trailtoug...emart&Itemid=53

Yes, the stock subaru 4WD system is FWD, then it engages the rear when put into 4WD.

#123 kodiak1232003

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Posted 03 February 2009 - 03:27 PM

very cool :banana:

#124 monstaru

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Posted 03 February 2009 - 06:44 PM

have you had any issues with the sammi t-case lever shifting into gears after the case being clocked,and (i am assuming here) the shifter rod massaged,bent and or both?cheers, brian

#125 The Dude Abides

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Posted 04 February 2009 - 03:07 AM

:popcorn:

:banghead: just waiting for this to be done.




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