BabySpinach Posted October 18, 2016 Share Posted October 18, 2016 Hello,I just finished swapping a 1999 Chrysler 8.25 from an XJ into my Comanche rear. I cut off the shock mounts and perches. Welded the perches in exactly the same spacing as the Dana 35 that was removed (6.25 in eye-to-eye). The driveline is centered, but when checking the spacing on either side of the vehicle, the tire sticks out 1 inch further past the frame on the drivers side. Everything is torqued to spec.. Not sure what to do?Can I run a 1 inch spacer on the passenger side?Is this a common issue?I've read about some Cherokees having this issue from the factory. Link to comment Share on other sites More sharing options...
BabySpinach Posted October 18, 2016 Author Share Posted October 18, 2016 Here are pics of the driver's side and passengers side:Driver's Side looking back: Passenger's Side looking back: Link to comment Share on other sites More sharing options...
Pete M Posted October 18, 2016 Share Posted October 18, 2016 eye to eye? Link to comment Share on other sites More sharing options...
BabySpinach Posted October 18, 2016 Author Share Posted October 18, 2016 eye to eye? Measured perch mounts from the center spring retaining hole eye to the backplate for the brakes on the axle. Link to comment Share on other sites More sharing options...
Pete M Posted October 18, 2016 Share Posted October 18, 2016 are they 42" center pin to center pin from each other? Link to comment Share on other sites More sharing options...
BabySpinach Posted October 18, 2016 Author Share Posted October 18, 2016 are they 42" center pin to center pin from each other? They are 6.25 inches from the base plate to the perch eye. Exactly the same spacing as the D35. Link to comment Share on other sites More sharing options...
Pete M Posted October 18, 2016 Share Posted October 18, 2016 but that's a completely different axle. that particular spacing might be different. if the perches aren't 42" apart center-to-center, then the leafs will be out of alignment and it'll pull the axle to one side or the other. Link to comment Share on other sites More sharing options...
BabySpinach Posted October 18, 2016 Author Share Posted October 18, 2016 but that's a completely different axle. that particular spacing might be different. if the perches aren't 42" apart center-to-center, then the leafs will be out of alignment and it'll pull the axle to one side or the other. Everything I saw showed the swap was identical. I'll go measure when I get a min. They're already welded in and completely bolted up. :( Link to comment Share on other sites More sharing options...
Eagle Posted October 18, 2016 Share Posted October 18, 2016 are they 42" center pin to center pin from each other? They are 6.25 inches from the base plate to the perch eye. Exactly the same spacing as the D35. The Dana 35 uses 1-3/4" brakes, the Chryco 8-1/4 uses 2-1/2" brakes ... but the wheel-mating-surface to wheel-mating-surface dimension is the same. That means the 8-1/4" backing plates are farther inboard than those on the D35. If you measure the center-to-center distance of your perches, I'll bet it isn't the same on the "new" axle as on the old D35. Link to comment Share on other sites More sharing options...
BabySpinach Posted October 18, 2016 Author Share Posted October 18, 2016 are they 42" center pin to center pin from each other? They are 6.25 inches from the base plate to the perch eye. Exactly the same spacing as the D35. The Dana 35 uses 1-3/4" brakes, the Chryco 8-1/4 uses 2-1/2" brakes ... but the wheel-mating-surface to wheel-mating-surface dimension is the same. That means the 8-1/4" backing plates are farther inboard than those on the D35. If you measure the center-to-center distance of your perches, I'll bet it isn't the same on the "new" axle as on the old D35. Just took measurements. Dana 35 is exactly 42" spacings. 21" to center on each side from perch mount eye. Chrysler 8.25 is exactly 42". 21" to center on each side from perch mount eye. My measurements are identical.. I'd have to guess if I put the D35 back in, it would also be off by an inch. Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 19, 2016 Share Posted October 19, 2016 I can't tell by your pics that it's off. What's the measurement from the inner backplate face to the outboard edge of the perch on the L and R sides? Link to comment Share on other sites More sharing options...
BabySpinach Posted October 19, 2016 Author Share Posted October 19, 2016 I can't tell by your pics that it's off. What's the measurement from the inner backplate face to the outboard edge of the perch on the L and R sides? The measurement from the center of the perch (the eye) to the backplate face on the axle (not the disk brake shield [i did a disk brake conversion]) is 6.25 inches on the left side and 6.25 inches on the right side. Link to comment Share on other sites More sharing options...
Rockfrog Posted October 21, 2016 Share Posted October 21, 2016 I have this exact same issue when I swapped an 8.8 in, everything is lined up perfectly, but the tires stick out an inch more on the driver side. Still haven't found a solution. May just use a set of mismatched spacers to correct it, if I let it bother me too much. I'm at the point where I almost think the stock D35 was the same but being so tucked in it wasn't really noticeable. I went so far as to swap springs and shackles thinking something was twisted. No change. It has settled to about a 3/4" difference now though. Sent from my SGH-I337M using Tapatalk Link to comment Share on other sites More sharing options...
Zebvance Posted October 21, 2016 Share Posted October 21, 2016 I have this exact same issue when I swapped an 8.8 in, everything is lined up perfectly, but the tires stick out an inch more on the driver side. Still haven't found a solution. May just use a set of mismatched spacers to correct it, if I let it bother me too much. I'm at the point where I almost think the stock D35 was the same but being so tucked in it wasn't really noticeable. I went so far as to swap springs and shackles thinking something was twisted. No change. It has settled to about a 3/4" difference now though. Sent from my SGH-I337M using Tapatalk are you sure when you ,measured for placement of perches you did measure from the center of the dif? the diff is offsent on a 8.8 by a inch. Link to comment Share on other sites More sharing options...
yxmj Posted October 21, 2016 Share Posted October 21, 2016 The 8.8 diff is off set by about 3" One axle tube is 20" the other 17" It is about 7/8 " narrower overall than the 35 Link to comment Share on other sites More sharing options...
Rockfrog Posted October 22, 2016 Share Posted October 22, 2016 Yeah I measured correctly, several times ... From backing plates and wheel flanges to perches. Having been a former Ford guy I don't rely on the differential or pinion as a center point. Sent from my SGH-I337M using Tapatalk Link to comment Share on other sites More sharing options...
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