NAPA says it carries both the slow and quick ratio.
Part Number: NSP 88278113 is the quick ratio. The one thing to watch is that the rebuild is in fact a fast ratio box. When you pick it up count the turns full right to left. it should be 2.5 turns. Because they are interchangeable I have seen them put either in the box. Also make sure the box is centered before installing.
Fred, I have never seen a re builder go through the trouble to change the gear to make it look like a fast ratio box, but I doubt the gears would mesh without binding. The stops are on the gears. You in theory could grind the stops of a fast ratio to make it look slow but the box would turn the wheels way too far. To me it's a non issue.
If you have done this please give me some hints. I have rebuilt boxes before but never heard of this actually being done.
can't speak from personal experience on the NAPA part, but I would suspect they are a very good alternative. It doesnt answer you question but when I installed my replacement box, I went to AdvanceAutoParts and ordered one from them. With the BIG35 Discount code I got it for less than $100 and have been happy with it.
Pretty sure the brand they carried at the time was Fenco, but now their site list something different. At the time they showed 2 units for a Caprice, 1 standard and the other for Police Vehicles (9C1) which was the quick ratio and the 1 I bought. But as others have said, be sure to check the amount of travel on the box to confirm what you got.
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