Ford 8.8 28 spline axle limit
11-29-2011, 10:29 PM
#1
Ford 8.8 28 spline axle limit I know this isn't the best place for this info but I'm not a Ford guy and just can't see myself lining up to join one of their forums so...
I just had an 8.8 completely gone through to install in my s10 and I'm wondering if the 28 spline axles will hold up. The truck has an LS1 with stock 243 heads, LS6 intake, 216/224 cam and will be backed with an SS4000 stall and 3.73 gears. I will have sticky tires and Cal-trak bars so it should hook pretty good. The deal is I'm going to have AI port my heads next year and move up to a bigger cam and probably a FAST intake. I'm shooting for 450-475 rwhp. Now what I want to know is will the stock 28 splines hold up for the power I'm making now and will a set of after market 28 splines take the power I will be making down the road? If the stockers won't hold up to what I have now and the aftermarkets will hold the future power I'll upgrade now. If I need to go up in size for the future power I'll wait and sell the whole rear end and have one built with 33 or 35 spline axles.
I just had an 8.8 completely gone through to install in my s10 and I'm wondering if the 28 spline axles will hold up. The truck has an LS1 with stock 243 heads, LS6 intake, 216/224 cam and will be backed with an SS4000 stall and 3.73 gears. I will have sticky tires and Cal-trak bars so it should hook pretty good. The deal is I'm going to have AI port my heads next year and move up to a bigger cam and probably a FAST intake. I'm shooting for 450-475 rwhp. Now what I want to know is will the stock 28 splines hold up for the power I'm making now and will a set of after market 28 splines take the power I will be making down the road? If the stockers won't hold up to what I have now and the aftermarkets will hold the future power I'll upgrade now. If I need to go up in size for the future power I'll wait and sell the whole rear end and have one built with 33 or 35 spline axles.
11-30-2011, 05:57 PM
#3
Crap! I didn't even think about changing out the spider gears. I was stressing thinking I had to get a new diff when I just had this one built with Carbon Fiber clutches and all new bearings. I'll just plan on moving up to 31 splines next year and keep this 8.8.
11-30-2011, 06:02 PM
#4
I have seen and personally broke Ford 8.8's with 225HP and a set of slicks.
Throw a set of 31 Spline axles and an Eaton diff in there and you will be goldin. My 10 second 01 Mustang uses those exact parts and has been launched at over 5 grand.........
Throw a set of 31 Spline axles and an Eaton diff in there and you will be goldin. My 10 second 01 Mustang uses those exact parts and has been launched at over 5 grand.........
11-30-2011, 06:19 PM
#5
Just talked to the guy that built my 8.8 and he said my posi won't work with the 31 spline spider gears so I would have to change that. You don't think a set of Currie or Strange 28 splines would hold up (I don't think Strange actually makes a 28spline though).
11-30-2011, 07:44 PM
#6
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If your 8.8 has the factory 28 spline posi, you car swap out the side gears from an Explorer or F150. They are exactly the same (except spline count.) The Ford 8.8 is very forgiving. I have swapped used gears from one car to another, miss matched parts.
Also, I have had several cars run mid 10s 130+ mph with the OEM stock 8.8, one car did 1.5 60 ft, on slicks, dumping the clutch on the rev limiter with a 9psi powerdyne AND spraying a 150 shot out of the hole! NEVER broke a diff,
It all depends on the condition of the diffs internals.
Also, I have had several cars run mid 10s 130+ mph with the OEM stock 8.8, one car did 1.5 60 ft, on slicks, dumping the clutch on the rev limiter with a 9psi powerdyne AND spraying a 150 shot out of the hole! NEVER broke a diff,
It all depends on the condition of the diffs internals.
11-30-2011, 08:02 PM
#7
If your 8.8 has the factory 28 spline posi, you car swap out the side gears from an Explorer or F150. They are exactly the same (except spline count.) The Ford 8.8 is very forgiving. I have swapped used gears from one car to another, miss matched parts.
Also, I have had several cars run mid 10s 130+ mph with the OEM stock 8.8, one car did 1.5 60 ft, on slicks, dumping the clutch on the rev limiter with a 9psi powerdyne AND spraying a 150 shot out of the hole! NEVER broke a diff,
It all depends on the condition of the diffs internals.
Also, I have had several cars run mid 10s 130+ mph with the OEM stock 8.8, one car did 1.5 60 ft, on slicks, dumping the clutch on the rev limiter with a 9psi powerdyne AND spraying a 150 shot out of the hole! NEVER broke a diff,
It all depends on the condition of the diffs internals.
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11-30-2011, 09:37 PM
#8
Ok, I did some research myself and found conflicting info on swapping 31-spline spiders for 28-spline. At the end of this thread the guy seems to know the answer (no).
11-30-2011, 09:59 PM
#9
Ok, I did some research myself and found conflicting info on swapping 31-spline spiders for 28-spline. At the end of this thread the guy seems to know the answer (no).
11-30-2011, 10:24 PM
#10
Your posi will be the first to go after you swap to moser axles. I got a quote of 650 in parts for a moser spool, 33 spline axles, and c clip eliminators for the 8.8 in my coupe. I havent decided if i wanna do a spool though. I kinda wanna see if i can get a few launches out of the stock axles and posi before i build it, but i also dont want an axle to break and have the wheel come rolling down past my car while im stopped thanks to the c clips.
