When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I blew up my original 10 bolt the first drive I did after swapping my lt1 in (surprise) and now I am swapping in a 4th gen rear end from a 1994 Firebird Formula.
My car is a 1989 and it was equipped with drum brakes in the rear. My issue is that the hose that bolts to the axle with the "T" to go to each caliper was cut from the previous owner (to remove the axle I believe) and I was going to reuse the one from my third gen but the fittings look different. See pics below
This is the line from my third gen. The fitting is slightly different compared to the one from the 4th gen. 3rd gen line from the top. This is the hole where it bolts to the axle 4th gen line. Again notice the difference from the 3rd gen one. 4th gen top view.
What should I do? These lines look different and I don't want them to leak. Also, if I just buy a 4th gen one, will it thread into the main hardline that comes from the brake booster? I have no way of telling since the end was cut off.
If I do need that 4th gen brake hose, what is it called? I can't seem to find a part number and the guys at oriellys and autozone don't have it either. Thanks!
While I'm at it, what do I need to make my emergency brake cable work?
The 3rd gen line is SAE inverted flare. The 4th gen one is metric bubble flare. Prob 6mm.
You'll have to look at what's on the car, where the steel line screws into the rubber one, to see what it is.
IMO probably the easiest thing to do would be to make the rear match the car totally. If the car is SAE there, then get an early rubber hose, and replace the lines on the rear with sticks of line you can buy at the parts store, and use SAE -> bubble flare adapters at the calipers. If the car is metric bubble then you should be able to just buy the right rubber hose for the 4th gen and use the bubble flare lines that are on the rear.
The 3rd gen line is SAE inverted flare. The 4th gen one is metric bubble flare. Prob 6mm.
You'll have to look at what's on the car, where the steel line screws into the rubber one, to see what it is.
IMO probably the easiest thing to do would be to make the rear match the car totally. If the car is SAE there, then get an early rubber hose, and replace the lines on the rear with sticks of line you can buy at the parts store, and use SAE -> bubble flare adapters at the calipers. If the car is metric bubble then you should be able to just buy the right rubber hose for the 4th gen and use the bubble flare lines that are on the rear.
Ok, so what I ended up doing was I bought a 4th gen hose from Ebay. This will solve my problem at the junction end. The next question is what I should do where the rubber hose screws onto the hardline.
This is the hardline on my car. Is this SAE inverted flair too? How should I go about connecting my new 4th gen hose to this hardline? If there is a way to convert one or the other, what should I be looking for? Thanks!!
Just to be clear, the hardline I sent a picture of is where the softline screws into. The hose I bought solves my issue with the calipers, I just need to mate the car to the center brake hose now.
OK, the hard line on the car is metric bubble flare.
The hose you bought is SAE inverted flare, at least, where the steel lines on the axle go into it. Not compatible.
If your new rear still has its original steel lines on it, you can probably buy the 4th gen hose, and it will hook up to all of what you've got, and work. The hose you bought, won't.
OK, the hard line on the car is metric bubble flare.
The hose you bought is SAE inverted flare, at least, where the steel lines on the axle go into it. Not compatible.
If your new rear still has its original steel lines on it, you can probably buy the 4th gen hose, and it will hook up to all of what you've got, and work. The hose you bought, won't.
This hose that I bought will work at the junction end, where the original steel lines connect to it. I am unsure what the other end has. I ordered the hose and I figure I can buy an adapter to make it work. Do you happen to know the size adapter I would need?
