??Why do the GMT 900 trucks have drum rear brakes??
Feb 10, 2007 | 03:48 PM
#11
TECH Enthusiast
Joined: Dec 2004
Posts: 602
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From: Houston, Tx
GM dropped the ball. I don't have a problem with rear drums, but at least design them such that they will not go out of round automatically. It's not something that one should have to deal with on a new truck.
Feb 10, 2007 | 04:15 PM
#12
TECH Senior Member
Joined: Jul 2006
Posts: 7,023
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From: Somewhere around -199C
We worked on both disk/disk and disk/drum configurations... and the stopping numbers came back better in favor of the disk/drum configuration.
plus the rear disks had big contamination problems because of the enviroment they are exposed to.
there is really no practical reason to hav the disks on the rear.
yes there are ways to convert like through ssbc, and companies of taht sort
plus the rear disks had big contamination problems because of the enviroment they are exposed to.
there is really no practical reason to hav the disks on the rear.
yes there are ways to convert like through ssbc, and companies of taht sort
Feb 11, 2007 | 12:32 AM
#13
Originally Posted by GMJim
Yeah gimmy rear disc brakes. I miss the seized calipers and the pulsating rotor runout, not to mention the previously mentioned malfunctioning emergency brakes and the (if you pay somebody else to do the brakes) freekin expense to fix it all. Rear Disc brakes on a truck are useless. Rear brakes don't do a hell of a lot anyway and the drums do it just fine and have done so for a long time. The front discs aren't subjected to the back wash of road salt and all the other crap on the roads like the rears are. The rear discs live in a more hostile and dirty environment and drums back there are better suited by their design. Rear Discs on a Corvette or other performance cars are less trouble because the owners don't drive them in the bad weather. I used to work on heavy fire trucks in the 80's and the manufacturers switched to disc brakes because of the extra surface area they provide. They were so troublesome and expensive they switched back to drums and never looked back. IMO be careful what you wish for.......you know the rest.
BTW GM was getting huge repair numbers for warranty on these brakes.
BTW GM was getting huge repair numbers for warranty on these brakes.
Feb 11, 2007 | 02:01 AM
#14
Originally Posted by regency
so on the 05's you can run 16's up front????? i have the single cab and if so that is really gonna suck a big one!!!!
no 16's on the front but 15's will fit out back
Feb 11, 2007 | 02:26 AM
#15
Disc brakes really don't work well with the 8.6" 10-bolt and 9.5" 14-bolt axles because they are semi-floating and use c-clips to retain the axle shafts. The next time you have the rear end on stand and the wheels off the ground, grab ahold of either tire and push and pull it. You'll notice that there is some play in the axles. It's not possible to eliminate this entirely in a c-clip axle. The F-bodies have similar problems with the rear brakes too, but theirs are smaller than the trucks.
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