Hey guys I found a 4x4 150 that I would believe is a 99 that has a 9:75 rear end, and I am considering the axle because its $300. Its coming off of a truck that was a cash for clunkers deal, and the truck appears to be in pretty good condition. I wrote down the VIN because I could not get a look at the axle code. I am really hoping that it has a 3:73 LS axle, but I could not get the VIN to go through to look at it.Does $300 sound reasonable?

All I have of the VIN is 1FTRX18LNA29956, but its supposed to be 17 long and I only have 15 letter/numbers.Do any of you guys think you can pull an axle code out of that?

 

The vin does not have the axle code in it. The vin can tell you the engine that was in it and 5.4 trucks get the 9.75 while the 4.6 get the 8.8, at least that is how the 04-08's are. Maybe someone who knows the 97-03's better will chime in and help you out.

 

id jump on that

BUT i believe youre gonna need a different driveshaft to go with the 9.75

next time check the door sticker. should have the axle code on it.

 

Couldnt I just pull the driveshaft too? I tried to look at the door sticker, but the guy couldnt get it open for me to see it. It was in a shipment of trucks that came in just today so if I am wanting to do this I gotta get at it pretty quick. I just got to hope for 3:73 LS because thats what I really want, but I can deal with the 3:55 LS because I may regear it to 4:56's anyways. The truck is complete, and has not been touched so I can pull anything I want to off of it as of now. I need to know what I need. I really wanted the motor but Obama locked it up Supposedly its a 5.4 with 135k.

 

Thanks man.. did know that. I was really hoping that I could figure something about the truck if anything but the VIN. So far all that I know is that it says C4C on the windshield, and it says 5.4v8 in the top right corner. It is a XLT off road package, but I dont know the differences between 98-99 or vice versa.

 

The stock gears with the ORP are 3.55 LS if I'm not mistaken.

 

I ran my VIN at my dealer and they told me it came from the factory with 3:73 ratio and 9.75 rearend.
So I guess than your VIN will show if read at the dealer?

 

The dealer probably has more resources than we do - we can't get that info out of the VIN with the decoders that we have available to us. Maybe they can look up the original buildsheet or something. We can get the ratio off the door jamb sticker, and both the ratio and size off the axle tag.

 

Thanks for the replies guys. I just went back to check it out, and it was sad seeing such a nice truck with a locked motor so I was initially sad. Then I got the axle code which is H9. I believe this is 3:55 LS which is not really what I wanted. Another issue.. The lug bolts are actually alot thicker on this 9:75 axle than the bolts on mine, and it has disk brakes. I have drum brakes and 16" wheels, and this axle has 17" wheels with disk brakes. So I dont think that the whole 9:75 rear end idea is going to work out. I also have no clue about the driveshaft, because blackedoutv6 is talking about a different driveshaft and then I talked to the guy at the yard, and he looked at me like I had 5 heads or something. So... I have no idea where to go at this point.

 

what color is the interior? if its in great shape i might get you to nab some stuff for me

 

It has a prairie tan interior. The seats, carpet, center console,dash.. EVERYTHING on that truck was in really good condition. The only bad thing is that the interior was sold on it as the guys were taking it off the truck. Some guy came while it was being taken off the truck, and said that he wanted every bit of the interior. So it was completely off limits, except to look at.

 

the studs should be the same

you can easily make the discs work on yours

wheel size doesnt matter

if the truck is 4wd and yours is 2wd then the driveshaft would not work

 

I don't think that it having 17" OEM wheels means the 16" ones won't fit? The 17's were just an option and I don't think they made the brakes any different either way?

Now, you would also need to get the master cylinder to go along with the rear disks if you have drum. Different valving between the two.

The lugs would be different, but all you would have to do is keep the lug bolts together as a set. The wheels on these trucks are HUB CENTRIC, and the hub sizes are the same for the 97-03 trucks. They simply went to larger dia lugs around 2001 or something...

I've got 16" OEM wheels off of an F150 that had the larger lugs, but my 'little' ones work just fine.

The difference in the drive shaft lengths is due to the different in sizes of an 8.8 compared to the 9.75. You need a 'shorter' drive shaft with the 9.75 because it puts the rear yoke closer to the transmission... (assuming the same trans/drivetrain in both rigs)

If you are going to get new gears anway, why not get it, even if it has 3.55's? Well, I guess if you were planning on just swapping it in because you already have 3.73's, then that's a good reason!

Mitch

 

Thanks ALOT!! I had no idea about how the difference in lugs would be as far as my truck between that one. I have 3:55's and its a locking diff. I have no idea what the difference between the two(3:55 LS and locking). I am only going to be running 35's on this new axle so I figured I could get away with 3:73's for awhile. I run 33's on 3:55's with no issues at all so I figured the bigger LS axle would make up for the extra weight of the 35's.

Only issue now is that I have aftermarket wheels that OEM lugs wont fit on.

 

your wheel will fit on there fine man

if you have the correct lugs for the wheels you have you should be good