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Old 08-27-2013, 12:41 AM   #1
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Gearing question

I found a ford 8.8 with disc brakes and lsd on craigslist for $50, the problem is that it has a 4.11 gear ratio and my front has a 4.10. It seems like it's too small of a difference to matter so I'm going to do it but I want some advice anyway. I want to replace my rear 44 because it needs a new pinion bearing (PO had 6" lift and no S.Y.E.) and I don't want to pay that money to have that fixed right now and it only has the stock lsd anyway. My front has the ox locker so that I want to keep.
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Build Thread 1989 YJ, (Soon to come: TBI 350, 4l60) np231 sye/wide chain/6 pinion planetary, D30 ARB & Ford 8.8 ARB 4.56, 31" rollers for now, bds 3.5" springs, 1" Boom Shackles.
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Old 08-27-2013, 01:21 AM   #2
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Don't believe they ever came with 4:11s. Here are some 8.8 facts I used to carry when looking for an axle so I would get what I was looking for. The ID codes are on a tag on the diff cover and it is important to measure the width so it will fit your YJ.


Look at the diff plate:
Specs:
Code Capacity Ratio
43 Open 3200 3.08
41 Open 3200 3.27
42 Open 4.10
46 Open 3.73
45 Open 3200 3.55
D4 Limited Slip 3200 3.73
D2 Limited Slip 4.10
L73 Limited Slip 3.73
L - Limited Slip Differential
C - Conventional Differential

Measurement Dana 35 Ford 8.8"
Width between wheel mounting surfaces 60.5" 59.75"
Pinion offset to right of center 3/4" 2-3/16"
Pinion length, tube center to U-joint center 11.5" 11-5/8"
Pinion height, U-joint center below tube center 1-7/8" 1-7/8"
Diff cover distance behind tube center 4-3/8" 4-3/4"
Bottom of diff housing below tube center 5" 5-7/8"
Disc brake rotors N/A 11.25 x 7/16"
Drum brake shoes 9 x 2.5" 7.25 x 1.25" (e-brake)
Distance between spring perches (o/c) 40.5" 39-1/4"
Tube diameter 2.5" 3.25" (neck down to 2.75")
Axle shaft diameter 1.16" 27-spline 1.31" 31-spline
Clearance under diff w/33x9.50 BFG MT's 10.25" 9-3/8"
Shock eye below tube bottom 2.5" (center), 3.25" (bottom) flush
Shock length at rest 20.75" 20"
Remaining shock compression at rest 4.75" 4"
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Old 08-27-2013, 01:44 AM   #3
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So I guess I would need new drive shaft, shock/spring mounts, spring plates, U-bolts and quite a few other things. Guess I might just have my 44 fixed after all, or try to fix it myself.
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Old 08-27-2013, 01:38 PM   #4
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You will need an install kit for the 8.8 yes new spring perches, shock mounts, e-brake cables etc. The driveshaft I had still worked but need the flange adapter.

Then there is welding costs if you don't have one. Install kits are available from several places I got mine at East Coast Gear Supply all good except an issue with the e-brake cables. Waiting on a answer from tech support.
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Old 08-27-2013, 06:27 PM   #5
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Quote:
Originally Posted by jokerchief462 View Post
You will need an install kit for the 8.8 yes new spring perches, shock mounts, e-brake cables etc. The driveshaft I had still worked but need the flange adapter.

Then there is welding costs if you don't have one. Install kits are available from several places I got mine at East Coast Gear Supply all good except an issue with the e-brake cables. Waiting on a answer from tech support.
I'm pretty dang good with a welder, I got a quote to have the bearings replaced and seals replaced in my 44 for $400 with labor so I'm going to do that
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Old 08-27-2013, 06:35 PM   #6
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if the 8.8 is 4.10 and in good shape its worth the 50 bucks to buy it and sell it to off set some of your cost on the dana 44.
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Old 08-27-2013, 07:01 PM   #7
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Quote:
Originally Posted by 4Jeepn View Post
if the 8.8 is 4.10 and in good shape its worth the 50 bucks to buy it and sell it to off set some of your cost on the dana 44.

What he said. You could get easily 250-300 bucks for the 8.8. So lets say you get the $250. Then you are only out $200.00 on the repair to the D44
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Old 08-28-2013, 04:13 PM   #8
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Quote:
Originally Posted by 4Jeepn View Post
if the 8.8 is 4.10 and in good shape its worth the 50 bucks to buy it and sell it to off set some of your cost on the dana 44.
Quote:
Originally Posted by rykemc View Post
What he said. You could get easily 250-300 bucks for the 8.8. So lets say you get the $250. Then you are only out $200.00 on the repair to the D44
I did buy it. I might swap it in eventually, but I have to decide whether it's better to sell it or use it

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Build Thread 1989 YJ, (Soon to come: TBI 350, 4l60) np231 sye/wide chain/6 pinion planetary, D30 ARB & Ford 8.8 ARB 4.56, 31" rollers for now, bds 3.5" springs, 1" Boom Shackles.
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