Hey All,
I have probably seen it here somewhere but at the moment I can't find the thread so I will ask you guys.
I have just gotten back from Korea and I am wanting to put bigger tires o my 90 B2. I got 31's on her now. I got the spicer 35 ifs and 7.5 rear. I just would like some one to tell me how much bigger I can go with tires b4 I got to go with bigger axles.

Thanks in advance

 

> I got the spicer 35 ifs and 7.5 rear.

If you have a stock vehicle the front axle should be a Dana 28, even if a 1990. If it came with a Dana 35 then it should have a 8.8 out back. Some look like a Dana 35 on the outside, but, the guts and axle shafts are a Dana 28.

Supposedly some 1990s that came with a 4.0L (never seen it) which also came with the Dana 35/8.8.

With a Dana 28/7.5 axle 31s would be the biggest I would run.

The biggest I would run on the Dana 35/8.8 would be 35s with the 2.9L, though 33s would be a better size.

 

I have seen the 35 TTB have trouble with 35's. Again depends on how you drive it and what you use it for. What I have seen is the 35's have enough leverage to knock the alignment out on some trails. Not as much of a problem if it's a trailer queen as it would be if it's a daily driver. And your driving style will make a big difference. Alignments can be expensive. I have thought about drilling the points of the adjustment cams and top of the steering knuckle so I could use a pin or set screw to help hold the adjuster in place. Right now I'm running 33's so untill I have a problem I'll wait.

 

Honestly guys....I have the 35 up front. I learned the hard way. I followed the book and got manual locks for the 28 and when I went to put them on...found out I had the 35 by the number of splines on the axle.
Alright then...I was planning on 33 inch tires when I get out to CO and after reading your comments I think thats the way I will go.
Thanks!

 

You won't find a d35/8.8 factory combo but there were an awful lot 90's with a D35/7.5 combo. Actually you won't find an 8.8 at all from the factory in a BII. The hybrid D35/D28 is out there but only found in rangers from what I've seen and read. I know my BII had a true D35 with a 7.5 rear as do most 90 BII's I've seen.

To be honest I've never seen a 90 BII around the parts store that didn't have a D35. I'm sure they're out there but I'm still waiting to see one in my area. The only adjustment you might want to do is call it a "Dana 35".

33's should be no problem for your axles just keep an eye on that stupid CV POS they used as a rear drive shaft.

 

Already got rid of the rear shaft and put one in with all u-joints. Yeah the cv pos didnt last long after I put the 31's on

 

Like everybody else that has posted here, I would say don't go bigger than 33"s on the stock axles (D35 should be fine with bigger, however the 7.5 won't take the offroad abuse of 31"s for long, and 33"s is a no-no offroad unless you're willing to get towed out of there with your rear axle snapped).

So it really depends on what you're going to be doing with your B2.

 

So RomerB2...( or anyone else!)what do you suggest i do about my rear axles? I am up for suggestions. Is there a swap I can do with the axles on my stock rear or should I look into swapping out to a bigger rear from an explorer/ranger? I do want to run 33's and I wasn't aware that they could trash the 7.5 like you say. I am learnin something every time I post here!

 

I would step up to an 8.8 since they're a pretty strong setup, I think you can keep your stock suspension stuff from what I've read about them.. not 100% sure about that, I haven't swapped mine out yet. The 7.5" won't take the abuse of a lot of horsepower or an offroad rig. I would consider an exploder rear swap, and you can usually find them around for decent prices. If you are going to go through this hassle of swapping the rears out, you might look at also putting in some 4.10's or something.

 

Advice taken and already starting the search! BTW...can anyone tell me of any good swap meets/ salvage yards etc. out in Colorado? I will be in the Fort Carson/ Colorado Springs area by late April.
Thanks!

 

Glad to help you out. Sorry, but I don't know of any places. You might look through like a bargain trader or something like that, see if you can find people with 4.0 engines for sale (they're usually from rolled or some other type of injured Explorer or Ranger) and ask if they happen to have any rear axles for something. That's how I found mine (also swapping in a 4.0, so while I was at this guys "personal salvage yard" I asked about the rear end on the Explorer I'm getting my engine from). Kind of funny, from this guy, I'm getting the engine, rear axle, mounting frame for drivers seat (bent) and a fender off of another Bronco II. I'm kind of stoked to tell you the truth.

To clear up any confusion about the D28/D35 questions. The D28 was available from 83-89 Rangers/Bronco II's, and in 90 they switched to the D35 up front for the Bronco II's, and that is from both Ford and from the LMC Truck catalog stating what parts were on what.

 

> I had the 35 by the number of splines on the axle.

That would have been 27?

> that is from both Ford and from the LMC Truck catalog

Actually, I have the 1990 Sales Data catalog for most of the 1990 Ford trucks and Ford lists the 23 spline (6.8 ring gear) Dana 28 for the BII and the 27 spline Dana 35 for the Explorer, though they both have the same 2750 pound rating. They list the drivetrain change from 1989 as "NONE" except some minor EEC-IV connector changes.

Though that means little, I have seen factory "one offs" by both Ford and Chevy to get rid of excess parts, both trim and drivetrain parts where if it fit, it went on.

I have seen very few 1990 BIIs (even less Rangers). Though if they came with a Dana 35 that might make them much more valuable then a 1989. I always avoided the 1990 because the grill/headlamps were the aero style and more expensive to replace if you nuked them with a branch.

Though if it has a Dana 35 that would change :-)

 

Uh... every parts listing I have seen for a '90 BII says that if it has the 23-spline outer axle, that the '89 hubs needed to be purchased .... or "27-spline axle only... yadda yadda yadda":

Warn Standard Manual 4WD Hub
Part Number: 29071
Vehicle: 1990 FORD BRONCO II
Engine: V6 2.9 Liter FI
Standard Manual Set; Early 90 Vehicles With 23 Tooth Axle Spline Require 1989 Model Hubs; Spindle Bearing Conversion Kit {27997}
This product fits the following vehicles
FORD
1990 BRONCO II
1990 - 1997 RANGER
1991 - 1995 EXPLORER

MAZDA
1994 - 1997 B2300
1994 - 1997 B4000
1994 - 1996 B3000
1991 - 1994 NAVAJO
------
LMC Truck: http://www.lmctruck.com/icatalog/fr/0083.asp (Dana 28 info)
http://www.lmctruck.com/icatalog/fr/0084.asp (Dana 35 info)
http://www.lmctruck.com/icatalog/fr/0085.asp (7.5 info)

 

This D35 in a 90 BII thing is 100% true. I owned one and have seen others. This isn't a one off thing, they made quite a few of them this way.

 

> I owned one and have seen others

I'm a believer now ;-)