mini birf compatable - Pirate4x4.Com : 4x4 and Off-Road Forum

ranger · 10-31-2002, 01:00 PM

Question is: Will mini birfields work in a later model (79)FJ front axle as a direct replacement?

wngrog · 10-31-2002, 01:37 PM

Quote:

Originally posted by ranger
Question is: Will mini birfields work in a later model (79)FJ front axle as a direct replacement?

Yes.

fish · 10-31-2002, 02:30 PM

Yup I run them in mine for now, hope to get LONGFIELDS soon.

morgan · 10-31-2002, 04:07 PM

My '76 front axle is running minitruck knuckles, birfields and locking hubs. I believe they're all the same as J6 stuff.

Morgan

Gunmetalcruz · 10-31-2002, 06:32 PM

My fj40 is a 79 and they fit but it far more of a pain then it forth. carbide bur the inside of the axle housing and then they fit like a champ. Not such a big deal getting them in but when you smoke a inner cage on a birf and they are all covered in grease and you can't ge them out and you have have to take off the knuckle wipers etc. you will definetlly appreciate that you ground them.
Just my 2cents.Tom

design311 · 11-01-2002, 06:21 AM

Excuse my ignorance please...are you saying that the birfields and axles are a direct replacement? I thought you had to separate the birfs from the mini axles and put the cruiser axles back in. It's also early...the coffee hasn't kicked in yet

Eskimo · 11-01-2002, 06:36 AM

Quote:

Originally posted by design311
Excuse my ignorance please...are you saying that the birfields and axles are a direct replacement? I thought you had to separate the birfs from the mini axles and put the cruiser axles back in. It's also early...the coffee hasn't kicked in yet

I hear ya on the coffee...

You still have to use your cruiser inner axles, but the birfs fit...that's what he was saying.

morgan · 11-01-2002, 07:52 AM

Yeah, you have to use the cruiser inner axle shafts.

And like Gunmetalcruz said, you also have to grind the top and bottom lip of the axle housing, where the birfield goes in, so that there's room for the larger minitruck birfield.

Morgan

JasonH · 11-01-2002, 08:02 AM

If it is a 79 axle (1/79 or later) you won't have to grind. The stock birfs are the same as the mini truck birfs.

Jason M · 11-01-2002, 08:11 AM

In my dec 78 cruiser there was no need for grinding.
However I have heard of 12/78's that did need grinding. Stick it in and find out.

JasonH · 11-01-2002, 08:34 AM

Quote:

Originally posted by Jason M
Stick it in and find out.

That's sound advice for any situation!

ranger · 11-01-2002, 09:02 AM

Thanks for the input, I think.....(pun)

fish · 11-01-2002, 08:13 PM

I think you only have to do any grinding if you are useing a drum brake axle. I had to grind my 74.

smalltimewheeler · 11-01-2002, 08:49 PM

Quote:

Originally posted by fish
I think you only have to do any grinding if you are useing a drum brake axle. I had to grind my 74.

The only grinding that should be done is grind the u-bolts off and drop that housing for something else,sorry changed to many of those things, hate drawbacks.

morgan · 11-01-2002, 09:29 PM

Quote:

Originally posted by fish
I think you only have to do any grinding if you are useing a drum brake axle. I had to grind my 74.

Nope, my '76 had disc brakes from the factory, and the housing needed grinding for the mini birfields to fit.

Someone else said it's '79 and up cruiser axles that fit the minitruck birfields. That sounds right.

Morgan

Eskimo · 11-02-2002, 07:21 AM

Quote:

Originally posted by smalltimewheeler

The only grinding that should be done is grind the u-bolts off and drop that housing for something else,sorry changed to many of those things, hate drawbacks.

Yeah, you're right... Every single one of Bobby Long's customers are idiots for not changing their axles.

I'm saving up for a 60/70 myself... but For many, a birfield works just fine. ESPECIALLY a Longfield.

smalltimewheeler · 11-02-2002, 08:49 AM

Quote:

Originally posted by Eskimo

Yeah, you're right... Every single one of Bobby Long's customers are idiots for not changing their axles.

I'm saving up for a 60/70 myself... but For many, a birfield works just fine. ESPECIALLY a Longfield.

Let me have set of those for 1 day, it wont be good. I know where all you are coming from, i ran those for about 4 years couldn't afford to switch. But if you can try to stay around the stock width, it helps. There wasn't any of those longfields out there, I was testing that cv unlimited crap thats why i switched, those dand 44s with the chrome moly shafts and ctms are very impressive though.

Eskimo · 11-02-2002, 12:04 PM

Yes, we all know CVU's birf aren't as strong as Bobby's... They're also on gen 4 or 5 now, and they are getting more and more similar, with Bobby's being a little softer still.

10-31-2002, 01:00 PM	#1 (permalink)
ranger Registered User Join Date: Jul 2000 Member # 1282 Location: Boise, Idaho Posts: 4,819	mini birf compatable Question is: Will mini birfields work in a later model (79)FJ front axle as a direct replacement?

10-31-2002, 04:07 PM	#4 (permalink)
morgan Registered User Join Date: Feb 2000 Member # 228 Location: Oakland, CA, USA Posts: 1,380	My '76 front axle is running minitruck knuckles, birfields and locking hubs. I believe they're all the same as J6 stuff. Morgan __________________ Morgan Fletcher, Oakland, CA - 76 FJ55, 94 FJ80 - TLCA #5973 Ad Astra Per Alia Porci! - [url="http://www.birfield.com/~morgan"]http://www.birfield.com/~morgan[/url]

10-31-2002, 06:32 PM	#5 (permalink)
Gunmetalcruz Registered User Join Date: Aug 2001 Member # 6569 Location: Tahoe City,Ca. Posts: 4,029	My fj40 is a 79 and they fit but it far more of a pain then it forth. carbide bur the inside of the axle housing and then they fit like a champ. Not such a big deal getting them in but when you smoke a inner cage on a birf and they are all covered in grease and you can't ge them out and you have have to take off the knuckle wipers etc. you will definetlly appreciate that you ground them. Just my 2cents.Tom __________________ Team FOH# 321 Thanks to the people making it happen Weathertight,Polyperformance,CTM Racing Products,Levrett Transmission,BFGoodrich Tires,Kickass Offroad,Reid Racing,West Coast Differentials,Wide Open Design

11-01-2002, 06:21 AM	#6 (permalink)
design311 Registered User Join Date: Mar 2001 Member # 3809 Location: R-can-saw Posts: 325	Huh? Excuse my ignorance please...are you saying that the birfields and axles are a direct replacement? I thought you had to separate the birfs from the mini axles and put the cruiser axles back in. It's also early...the coffee hasn't kicked in yet __________________ Firefighter/EMT - 9/11 NEVER FORGET the 343!!!!!! 05 Rubicon, 09 JK X

11-01-2002, 07:52 AM	#8 (permalink)
morgan Registered User Join Date: Feb 2000 Member # 228 Location: Oakland, CA, USA Posts: 1,380	Yeah, you have to use the cruiser inner axle shafts. And like Gunmetalcruz said, you also have to grind the top and bottom lip of the axle housing, where the birfield goes in, so that there's room for the larger minitruck birfield. Morgan __________________ Morgan Fletcher, Oakland, CA - 76 FJ55, 94 FJ80 - TLCA #5973 Ad Astra Per Alia Porci! - [url="http://www.birfield.com/~morgan"]http://www.birfield.com/~morgan[/url]

10-31-2002, 02:30 PM	#3 (permalink)
fish Wheeler Join Date: Aug 2002 Member # 13463 Location: Fairfield Ohio Posts: 483	Yup I run them in mine for now, hope to get LONGFIELDS soon.

11-01-2002, 08:02 AM	#9 (permalink)
JasonH Registered User Join Date: Sep 2000 Member # 1767 Location: McKinney, Texas Posts: 765	If it is a 79 axle (1/79 or later) you won't have to grind. The stock birfs are the same as the mini truck birfs. __________________ TLCA #8123 Lone Star Land Cruisers - 79 FJ40

11-01-2002, 08:11 AM	#10 (permalink)
Jason M Registered User Join Date: Jun 2001 Member # 5286 Location: Vegas Posts: 9,827	In my dec 78 cruiser there was no need for grinding. However I have heard of 12/78's that did need grinding. Stick it in and find out. __________________ DEAR MADAM: THANK YOU FOR YOUR RECENT ORDER FROM OUR SEX TOYS WEBSITE. YOU'VE REQUESTED THE LARGE RED VIBRATOR AS FEATURED ON OUR WALL DISPLAY. PLEASE SELECT ANOTHER ITEM. THAT'S OUR FIRE EXTINGUISHER

11-01-2002, 09:02 AM	#12 (permalink)
ranger Registered User Join Date: Jul 2000 Member # 1282 Location: Boise, Idaho Posts: 4,819	Thanks for the input, I think.....(pun)

11-01-2002, 08:13 PM	#13 (permalink)
fish Wheeler Join Date: Aug 2002 Member # 13463 Location: Fairfield Ohio Posts: 483	I think you only have to do any grinding if you are useing a drum brake axle. I had to grind my 74.

11-02-2002, 12:04 PM	#18 (permalink)
Eskimo Registered User Join Date: Mar 2002 Member # 10429 Location: Danville, PA Posts: 4,456	Yes, we all know CVU's birf aren't as strong as Bobby's... They're also on gen 4 or 5 now, and they are getting more and more similar, with Bobby's being a little softer still. __________________ Rich Q. FJ-40 Cruggy - tuned 5.3/4WS rockwells/linked/ORI's/42's

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