Why does this happen, Please read and help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

roughedup72 · 01-15-2011, 09:08 PM

I have a 3:73 posi rearend. When I try to roll the truck backwards i can hardly move it. If I roll it forwards it rolls fine. Is this typical of a posi unit or am I about to be rebuilding my rearend. I notice it feels a little more slugish also. It even does it if it's in reverse. It feels like something is binding or as if the brakes were on.

**67sss** · 01-15-2011, 09:22 PM

parking brake stuck?

roughedup72 · 01-15-2011, 10:45 PM

It releases and the drums arent hot after driving it. That was my initial thought also so I checked it to see. As a matter ofact I remember when I put new brakes on the bake I had both drums off with the truck jacked up an tried to turn the axle and couldn't hardly rotate it backwards, no problem forward though.

**67sss** · 01-15-2011, 11:02 PM

if you put new brakes on, I'd make sure you didn't put em on backwards. I think(not 100%) the larger of the brake pads goes toward the rear of truck, cause it does the majority of the stopping.

bajaracing · 01-15-2011, 11:22 PM

I'd pull the cover off and take a lil peek.. Maybe even drop the driveshaft to reassure the issue is in the back end. Good luck!
Posted via Mobile Device

dixietruck71 · 01-16-2011, 12:58 AM

a buddy of mine had this problem shortly after doing a brake job. turned out that he had the shoes backwards. the larger shoe gos on the back, it is the e brake shoe. the smaller shoe gos on the front side of the backing plate.

*Kokomoooo* · 01-16-2011, 01:09 AM

I had that problem once. I would back up and it would barely move, then something would pop loose and it would roll freely. Turned out to be dirt or some other debris in the line. I removed the line from the proportioning valve and blew it out, re-bled, and the problem went away.

roughedup72 · 01-16-2011, 11:34 AM

The reason I redid the brakes was because they were on backwards,lol. That was causing all kinds of problems.When I changed them around to the way they are supposed to be is when I noticed it. I had both drums off and would try to rotate the axles by hand, could hardly move it in reverse and move it freely forward. I am going to drop the driveshaft today and see if that makes a difference.

usmcchevy · 01-16-2011, 12:23 PM

I have the same problem right now(can go backward) Pretty sure mine is the parking brake cable not returning all the way.

dadsworktruck · 01-16-2011, 01:42 PM

Check out this lil pdf, when you said twice you removed the drums and it does same thing i just can't see it being a brake problem, but stranger things have happened, it might not be your problem but wouldnt hurt to try....good luck........http://www2.dana.com/pdf/5315-3.pdf

01-15-2011, 09:08 PM	#1
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Why does this happen, Please read and help I have a 3:73 posi rearend. When I try to roll the truck backwards i can hardly move it. If I roll it forwards it rolls fine. Is this typical of a posi unit or am I about to be rebuilding my rearend. I notice it feels a little more slugish also. It even does it if it's in reverse. It feels like something is binding or as if the brakes were on. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

01-15-2011, 09:22 PM	#2
67sss Registered User Join Date: Nov 2002 Location: Mt. Vernon, WA.. Posts: 2,324	Re: Why does this happen, Please read and help parking brake stuck?

01-15-2011, 10:45 PM	#3
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: Why does this happen, Please read and help It releases and the drums arent hot after driving it. That was my initial thought also so I checked it to see. As a matter ofact I remember when I put new brakes on the bake I had both drums off with the truck jacked up an tried to turn the axle and couldn't hardly rotate it backwards, no problem forward though. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

01-15-2011, 11:02 PM	#4
67sss Registered User Join Date: Nov 2002 Location: Mt. Vernon, WA.. Posts: 2,324	Re: Why does this happen, Please read and help if you put new brakes on, I'd make sure you didn't put em on backwards. I think(not 100%) the larger of the brake pads goes toward the rear of truck, cause it does the majority of the stopping.

01-15-2011, 11:22 PM	#5
bajaracing Registered User Join Date: Dec 2009 Location: SoCAL Posts: 121	Re: Why does this happen, Please read and help I'd pull the cover off and take a lil peek.. Maybe even drop the driveshaft to reassure the issue is in the back end. Good luck! Posted via Mobile Device

01-16-2011, 12:58 AM	#6
dixietruck71 Registered User Join Date: Dec 2010 Location: ravensdale washington Posts: 111	Re: Why does this happen, Please read and help a buddy of mine had this problem shortly after doing a brake job. turned out that he had the shoes backwards. the larger shoe gos on the back, it is the e brake shoe. the smaller shoe gos on the front side of the backing plate. __________________ 71 gme Sierra Grande lwb. 68 Rambler American 2 door 75 jeep cj5

01-16-2011, 01:09 AM	#7
Kokomoooo Account Suspended Join Date: Jan 2011 Location: Kokomo Indiana Posts: 56	Re: Why does this happen, Please read and help I had that problem once. I would back up and it would barely move, then something would pop loose and it would roll freely. Turned out to be dirt or some other debris in the line. I removed the line from the proportioning valve and blew it out, re-bled, and the problem went away.

01-16-2011, 11:34 AM	#8
roughedup72 Senior Member Join Date: Oct 2005 Location: south carolina Posts: 658	Re: Why does this happen, Please read and help The reason I redid the brakes was because they were on backwards,lol. That was causing all kinds of problems.When I changed them around to the way they are supposed to be is when I noticed it. I had both drums off and would try to rotate the axles by hand, could hardly move it in reverse and move it freely forward. I am going to drop the driveshaft today and see if that makes a difference. __________________ 1972 chevy cheyenne 10,nothing special at the moment,Its a work in progress, Working on the engine, paint and body,engine, paint and body,now its the suspenion, ahh hell I'm about tired of working on it. Maybe it will be a rat rod.

01-16-2011, 12:23 PM	#9
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: Why does this happen, Please read and help I have the same problem right now(can go backward) Pretty sure mine is the parking brake cable not returning all the way. __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index

01-16-2011, 01:42 PM	#10
dadsworktruck Registered User Join Date: Jul 2009 Location: blacksburg,s.c. Posts: 155	Re: Why does this happen, Please read and help Check out this lil pdf, when you said twice you removed the drums and it does same thing i just can't see it being a brake problem, but stranger things have happened, it might not be your problem but wouldnt hurt to try....good luck........http://www2.dana.com/pdf/5315-3.pdf



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