Front disc brakes

[REDROCKER652002]

My son has a 1969 half ton that he is trying to get on the road. Today was brake day. The front are disc brakes, and seem to be in good shape. Rotors need to be turned, but other than that, all looks ok. My question this time is simple, did the 1969 come with disc brakes? If not, I have the part number printed on the back of one of the pads, but have not been able to find it using a google search. But, I am computer stupid, so any help would be most appreciated. The part letters printer on the back of the pad are ARHPTCF. Any help would be most appreciated. Thanks in advance. D

[Steeveedee]

Don't know about the part number, but disc brakes were first on Chevy trucks in late '70 just before the changeover in '71. That's according to some people here who have a '70 truck with disc brakes. How about some pictures?

[custom10nut]

Six lug or five? Five would mean that someone has done a conversion to 71-72 discs. If it’s Six lug, someone has done the aftermarket conversion.

[REDROCKER652002]

Originally Posted by custom10nut

Six lug or five? Five would mean that someone has done a conversion to 71-72 discs. If it’s Six lug, someone has done the aftermarket conversion.

Thanks so much, it is a five lug rotor. Sure looks like it is a stock setup, but that could be that it is just very dirty from sitting around so long. Gonna do a bit more checking, but thanks for the info. I have not had a chance to put any pics up, but will try. I am hopeful the numbers printed on the back of the pad will get me some info. Gonna do a google search and see what I can find. I am holding onto the info for now, I want my son to do his own legwork. Thanks again.

In looking at the conversion kit at Brothers Trucks, it is not that. The stock A arms and all the suspension seems to be there. The truck has been dropped though, so I am not sure if it is just lower springs on the front, or a drop spindle. I have not taken the backing plate off. But all the suspension seems to be stock.

RR

[REDROCKER652002]

OK. Finally getting back to this. The rear seal on the back of the Rotor has a part number of 19753, does this help? . It is a 5 lug bolt pattern. Any help here would be most appreciated.

RR

[michael bustamante]

most likely parts were used from a 73 on up as theyre always available. and the brake pads are all the same. id look up 78 chevy truck front brake pads on the autozone website and see if the look like yours. most likely they'll match.
71-72 pads might be the same aas well. im not sure but they do look very similar

[lolife99]

What a-arm bushings?
Steel or rubber?
Steel is 71-72
Rubber is 73-87

[GMCPaul]

All 1969 were originally drum brake front and rear so someone's converted it to disc brake front. When converting it they've either used aftermarket spindles, or stock 71-72 spindles, or stock 73-87 spindles. No matter what spindle year group they used they all use the same brake pads as 1971-87 brake pads are the same for all 1/2tons with 1 1/4" thick rotors or 1" thick rotor.
1973-80 trucks all used 1 1/4" thick rotors & 1981-87 1/2tons could be either 1 1/4" thick or 1" thick rotors as in 1981 they began offering light duty rotors that were 1" thick. But the brake pad used is still the same.
So buy any front brake pad for any 1/2 ton 2 wheel drive from 1971-87 and you will have the correct brake pads.
If you see a part # that is numbers only on the spindles its GM, if you see a part # on spindles that's letters & numbers its aftermarket conversion spindles.
I believe I covered all your questions so time to get packaging todays out going orders.
Paul Jr @ GMCPauls

[REDROCKER652002]

Originally Posted by GMCPaul

All 1969 were originally drum brake front and rear so someone's converted it to disc brake front. When converting it they've either used aftermarket spindles, or stock 71-72 spindles, or stock 73-87 spindles. No matter what spindle year group they used they all use the same brake pads as 1971-87 brake pads are the same for all 1/2tons with 1 1/4" thick rotors or 1" thick rotor.
1973-80 trucks all used 1 1/4" thick rotors & 1981-87 1/2tons could be either 1 1/4" thick or 1" thick rotors as in 1981 they began offering light duty rotors that were 1" thick. But the brake pad used is still the same.
So buy any front brake pad for any 1/2 ton 2 wheel drive from 1971-87 and you will have the correct brake pads.
If you see a part # that is numbers only on the spindles its GM, if you see a part # on spindles that's letters & numbers its aftermarket conversion spindles.
I believe I covered all your questions so time to get packaging todays out going orders.
Paul Jr @ GMCPauls

Awesome, thank you kind sir. That is exactly what I was looking for.

[REDROCKER652002]

And thanks to all who replied. All info is good info.

[REDROCKER652002]

As a follow up, I took what rotors I had to my mechanic to get turned. He found that one was not turnable, and the other was so rusted he was not sure. So, he took the seal number and other info and found me replacement rotors, pads and seals. Here is what I have. Rotors are from a 1972 C10 pickup, part number 18A2A from ACDelco. Pads are from a Mid 70's GM Pickup, part number 17D52MH ACDelco. I hope this may help somebody else who is doing what I have had to do, but I still have not put any of it on, but he said he matched it to what I had and it was the same.

[REDROCKER652002]

Some numbers off the spindle are: on the front is 283GM and LH28N and on the back is 6274265. Any idea what year the spindles might have come from? I searched the last number and came up empty. Thanks guys.

[REDROCKER652002]

And of course I spoke to soon. Seems the brake pads are way too thick to fit around the rotor. I am going to go back to the mechanic next week and see what's up. Any ideas? Thx

[Andy4639]

71 C10 was the first year for 5 lug factory front disc brakes on 1/2 ton trucks.

71 disc brakes are just a little odd from the 72 up brakes. Most people use the 72 up disc brakes because of this. The brake lines for the 71 want work on the 72 up caliper.
72 up brakes all interchange up through the late 80's.

What size rotor is on it? If it's not the 11" rotor then it a aftermarket assembly.

[kaycee]

Look them up and or replace from Rock Auto site helps a lot on researching some things .

[REDROCKER652002]

Originally Posted by Andy4639

71 C10 was the first year for 5 lug factory front disc brakes on 1/2 ton trucks.

71 disc brakes are just a little odd from the 72 up brakes. Most people use the 72 up disc brakes because of this. The brake lines for the 71 want work on the 72 up caliper.
72 up brakes all interchange up through the late 80's.

What size rotor is on it? If it's not the 11" rotor then it a aftermarket assembly.

Thanks for the info. According to the paperwork I have, the rotor is a stock 1972 C10 truck rotor. It fit perfectly on the spindle and the bearings and seal went on perfect. I am going to order a set of brake pads for a 1972 pickup and see if maybe that works. The next step is to order a 1972 caliper and see if the mounting holes line up on the spindle. I wish I would have just done the complete conversion kit, it would have been cheaper and I would know what I have, but that is the fun of these old trucks, right? LOL. I posted the numbers on the spindle, seems they are gm numbers as one has the GM in the number. My hope is that it is a 72 spindle and I can just drop in the 72 caliper and be done with it for now. Thanks to all who helped me out, More to come I am sure. LOL. Nest up after this, the rear brakes. I might convert them to disc now and avoid issues later. But cash is an issue as always.

[REDROCKER652002]

A final post to this thread, I think. We ended up having to get new calipers as the old ones were pretty bad and the cups were frozen. So, I thought it best to just buy all new. 72 pickup calipers fit right over the rotors, brake pads fit, mounting points on the spindle lined up perfect. So, now we just bleed the brakes and we are good to go. Thanks to all who helped me out, really appreciate your info.

[stsalvage]

Problems I see when people say they have Late 1970 with disc brakes on it. Since I've been told Modal years end in June or June 15 to be the latest then it turns in to 1971 modal that Why 1964 1/2 Mustang came out it was only in production for 6 months then went to 1965 modal year.

Now I hear you could get a special order of parts for that modal year But most guys I talk to about HP parts the 454 that came out in Late 1971 Most guys say it came out in 1972 But 1969 did not have disc brakes. Late 1970 which would have been Early 1971 But It depends on the plant that was pushing out trucks