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-   -   Disc Conversion For Your Dana 70 Rear Axle (https://www.dieselbombers.com/5-9l-rotary-performance/39628-disc-conversion-your-dana-70-rear-axle.html)

BC847 01-04-2010 09:54 PM


Originally Posted by Uncle Bubba (Post 464207)
Did ya build this mount or buy it pre-made someplace. Also curious as to what rotor you used for this. I'll take all the details you can give.

I need to move some images to my host. Give me some time and I'll give more details. ;)

tltruckparts 01-05-2010 12:07 AM

when you convert the discs in the rear, sometimes they will want to lock up because of too much brake in the rear, thats when a proportioning valve comes into play.

as for axle tube diameter coming into play, they make the mounts for any axle a ton of different places make them. i got mine from DIY4X: Catering to those who enjoy doing it themselves. i think i paid 65 bucks for them they were worth the money compared to making them myself for that much.

and as ford how many axles you can do it on, any full floating rear axle is pretty close to the same conversion, since they all work the same. whether its a dana 60, 70, 80, sterling, 14 bolt or any other rear end, as long as its a full floater its practically the same

chico_mustangs 01-05-2010 02:31 AM

I was just going to do this disk brake setup and use a line lock for an e-brake, it seems like a much easier and better way to do it to me.

Uncle Bubba 01-05-2010 09:15 AM

A line lock was my first thought until I asked more about it. Seems they don't work well for long term use as in overnight parking and such and for the guy's still usin the stock brake lines, line expansion over time would be a serious issue.

chpmnsws6 01-05-2010 09:46 AM


Originally Posted by chico_mustangs (Post 464616)
I was just going to do this disk brake setup and use a line lock for an e-brake, it seems like a much easier and better way to do it to me.

If you have any leaks, even the smallest one, you could wake up to your truck being at the bottom of the hill, if it doesn't try to run something over before hand :argh:

seandonato73 01-05-2010 09:27 PM

just gonna throw this out there, we have a pettiebone at work an the only thing that keeps it at the top of our hill every night is some sort of line lock thing, flip the leaver stand on the brakes and thats it. thing stays put. so i would allmost be willing to try it.

Uncle Bubba 01-05-2010 09:33 PM


Originally Posted by seandonato73 (Post 465205)
just gonna throw this out there, we have a pettiebone at work an the only thing that keeps it at the top of our hill every night is some sort of line lock thing, flip the leaver stand on the brakes and thats it. thing stays put. so i would allmost be willing to try it.

As it was said above though, one small leak, even the smallest of leaks and overnight you could lose pressure and find your truck in somebody else's driveway by mornin. Try explaining that to your neighbor that comes home in the mornin from workin his night shift and your truck is in his driveway while his wife was home alone. Lot a safety factors there when your talkin about around the public usage.

chico_mustangs 01-05-2010 10:59 PM


Originally Posted by Uncle Bubba (Post 465209)
As it was said above though, one small leak, even the smallest of leaks and overnight you could lose pressure and find your truck in somebody else's driveway by mornin. Try explaining that to your neighbor that comes home in the mornin from workin his night shift and your truck is in his driveway while his wife was home alone. Lot a safety factors there when your talkin about around the public usage.

Ok but the smallest "leak" in a brake line can also make you loose your brakes when driving and rear end someone, anything can fail at anytime. That's like saying your emergency brake cable could break at anytime and do the same thing. Since I have an auto the only time I ever use my e-brake is when I am loading a trailer or are on a serious hill. My Mustang I always leave in gear with the E-Brake on because its a stick. Occasionally I have left it in gear and not used my E-brake and never had her roll away.

Uncle Bubba 01-05-2010 11:07 PM

As long as the good and bad sides of the discussion are shown, that's all that matters. From there each reader can decide for themselves is all I wanted. Like I said, the line lock was my first idea also when i started readin this but with the alternative given to have a parking brake with these other calipers then to me it's a simple decision.

World would be a boring place if we all did it the same way.:tu:

chpmnsws6 01-06-2010 12:05 AM


Originally Posted by chico_mustangs (Post 465288)
Ok but the smallest "leak" in a brake line can also make you loose your brakes when driving and rear end someone, anything can fail at anytime. That's like saying your emergency brake cable could break at anytime and do the same thing. Since I have an auto the only time I ever use my e-brake is when I am loading a trailer or are on a serious hill. My Mustang I always leave in gear with the E-Brake on because its a stick. Occasionally I have left it in gear and not used my E-brake and never had her roll away.

A small leak can go unnoticed in day to day driving. Take a look under the wheel cylinder dust seal in 75% of the cars on the road over 2 years old and tell me what you see. My money is on them leaking. All 4 pistons leak some 1995 Buick, and have leaked for years. It brakes fine. EVERY Jeep I've worked on with drums have had a minor leak in at least one of the 4 pistons. Calipers are the same way, but they are typically more of a pain to check, so everyone just waits until they are leaking out of the dust seal before replacing them.

If you have been into the internals of your automatic, you would use your PARKING brake much more often. The parking pawl's are very small, and should not be put to the task of holding your vehicle in place on a hill.

That being said, please do it and let us know how it works out! I'd be interested in putting the Jamar brake lock on my Miata once its done depending on what calipers I use in the rear (possibly the stock front calipers)


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