Rear end compatibility
CF Veteran
Joined: May 2011
Posts: 1,578
Likes: 302
From: Central Iowa
The first step is to verify the gear ratio.
In the glove box of each truck is the RPO sticker. Compare the codes that start with G - one defines the gear ratio and the other defines if it’s limited slip.
If the gear ratio codes match, a swap is possible.
You’ll then want to compare the following measurements:
Axle mounts center to center - determines if the axle will bolt in place.
Axle flange (wheel hub flange) face to face - determines if the wheels will have the same spacing or be inboard/outboard relative to the original axle.
Driveshaft comparison - easiest by removing both and lying them side by side. Look at overall length, slip yoke size, and u-joint dimensions. Depending on the differences you may have to have to a driveshaft shop modify one to fit.
In the glove box of each truck is the RPO sticker. Compare the codes that start with G - one defines the gear ratio and the other defines if it’s limited slip.
If the gear ratio codes match, a swap is possible.
You’ll then want to compare the following measurements:
Axle mounts center to center - determines if the axle will bolt in place.
Axle flange (wheel hub flange) face to face - determines if the wheels will have the same spacing or be inboard/outboard relative to the original axle.
Driveshaft comparison - easiest by removing both and lying them side by side. Look at overall length, slip yoke size, and u-joint dimensions. Depending on the differences you may have to have to a driveshaft shop modify one to fit.
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CF Beginner
Joined: Nov 2022
Posts: 3
Likes: 0
The first step is to verify the gear ratio.
In the glove box of each truck is the RPO sticker. Compare the codes that start with G - one defines the gear ratio and the other defines if it’s limited slip.
If the gear ratio codes match, a swap is possible.
You’ll then want to compare the following measurements:
Axle mounts center to center - determines if the axle will bolt in place.
Axle flange (wheel hub flange) face to face - determines if the wheels will have the same spacing or be inboard/outboard relative to the original axle.
Driveshaft comparison - easiest by removing both and lying them side by side. Look at overall length, slip yoke size, and u-joint dimensions. Depending on the differences you may have to have to a driveshaft shop modify one to fit.
In the glove box of each truck is the RPO sticker. Compare the codes that start with G - one defines the gear ratio and the other defines if it’s limited slip.
If the gear ratio codes match, a swap is possible.
You’ll then want to compare the following measurements:
Axle mounts center to center - determines if the axle will bolt in place.
Axle flange (wheel hub flange) face to face - determines if the wheels will have the same spacing or be inboard/outboard relative to the original axle.
Driveshaft comparison - easiest by removing both and lying them side by side. Look at overall length, slip yoke size, and u-joint dimensions. Depending on the differences you may have to have to a driveshaft shop modify one to fit.
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