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| | | | Joined: Sep 2008 Posts: 46 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2008 Posts: 46 | in taking off my wheel cylinder, 52 3800 series i have the same part # on all 4 wheel cylinders, all the parts cat and store say i should have different front from rear,the bore is 13/8 on all four, and they have the same brake size thread, the delco # is 5450072 so do i have 4 rears or 4 fronts anyhelp would b appreciated trying | | | | | Joined: Feb 2006 Posts: 428 'Bolter | | 'Bolter Joined: Feb 2006 Posts: 428 | I don't know about the larger trucks, but on my 52 1/2 ton the front and back are different. What does the shop manual say? It should be explict in the bore, and length of the cylinders. | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy trying, Napa numbers. fronts UP4358-$85.99, rears UP9325-$114.00, they both have 1 3/8" bores and are the same from 46 - 52, hope that helps | | | | | Joined: Mar 2004 Posts: 874 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 874 | trying,
I believe you've posted the casting number, (not the part number)
which which happens to be the same for the front and rear.
5451615 is the Chevrolet part number for the rear.
5450071 is the Chevrolet part number for the front.
The difference probably being in the adjusters.
I don't think the original part numbers would be of much use now unless you were verifying NOS parts.
| | | | | Joined: Sep 2008 Posts: 46 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2008 Posts: 46 | steve you r right it must be the adjusters if mine r ok could i not buy 4 fronts as would be cheaper?thanks for everyones input trying | | | | | Joined: Jun 2008 Posts: 238 Shop Shark | | Shop Shark Joined: Jun 2008 Posts: 238 | On the larger trucks the adjusters are different styles on the front and back axles - so you can't use fronts on the back - Sorry . Be Sure before you buy. ED H | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | Fronts and rears do have different adjusters on the Huck style brakes. The rears mate with an ajuster wheel and the fronts are adjusted with a tool through a slot in the backing plate. | | |
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