H9 axle code
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From: North Carolina
H9 axle code
Wanted to throw this out there and see what other's think. My code on the door panel for the axle reads H9. H9 code indicates the rear differential should be a 3.55 Limited Slip. Now, this is a 92 Ford F150, 4x4, E4OD, and 5.8 EFI engine. I really believe that the original rear differential may have been removed. This is why I think this. At 55mph, the rpms are 1600. I could be wrong, but I would've thought that 3.55's would turn more rpms at this speed. The wheels are 31's. Also, one back wheel will spin by itself in the back. Would not both wheels spin with limited slip? What do you guys think? Thanks.
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1600 rpm could be a result of the E4OD as it has a good OD gear. Also with the one wheel spin, if the truck has a lot of miles, the locker could be worn out and need of a rebuild. The way you can tell is on the back cover of the rear there should be a tag, if it still a 3.55 locker, it should say 3L55 and some other numbers. Take a look and see if its there, good luck!
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Originally Posted by BroncoChris88
There is something wrong with that man. it shouldn't be that high
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From: Waterford Michigan
Originally Posted by jsgoss02
Wanted to throw this out there and see what other's think. My code on the door panel for the axle reads H9. H9 code indicates the rear differential should be a 3.55 Limited Slip. Now, this is a 92 Ford F150, 4x4, E4OD, and 5.8 EFI engine. I really believe that the original rear differential may have been removed. This is why I think this. At 55mph, the rpms are 1600. I could be wrong, but I would've thought that 3.55's would turn more rpms at this speed. The wheels are 31's. Also, one back wheel will spin by itself in the back. Would not both wheels spin with limited slip? What do you guys think? Thanks.
now with my 5 speed I am running 2400 at 70 and 1500 at 45. 5th gear is a .84.
