Interchangable items from 28 spline to 31 spline - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 05-17-2007
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Interchangable items from 28 spline to 31 spline

Here's the deal, my 28 spline is getting 4.56 gears along with the install kit in a few weeks. The guy doing it said he replaces all bearings and seals, etc.

BUT

Im getting a 31 spline with disk brakes later on this summer. So can the bearings/seals be transferred from the 28 to the 31 spline along with the 4.56 gears ok? Or am i going to have to buy a new install kit to swap the gears?

Thanks..
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Old 05-17-2007
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nope

have to get a new kit
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Old 05-17-2007
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i'd wait till you get the other axle mark

you could however get a short kit for know and put it in the 28 spline axle.
you'd need a inner pinion braring and race, crush washer, pinion seal, reuse the master shim and it should set-up ok.

i've done hundreds like this, thats how we did the state police cars at the place i last worked at.
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Old 05-17-2007
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pinion bearing will transfer, but that is about it. pinion seal as well.

but its new shims and other stuff like that.

Ive always used the same pinion nut and crush sleeve, and normally just reuse the bearings but i have spares for when/if we mess one up on the press.
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Old 05-17-2007
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I'll just have him put the 4.56s in the 28 spline so i can have them for the dunes.

31 spline will have to wait a while.
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Old 05-17-2007
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I'd go the other way. Don't waste the money gearing the 28 spline if you're going to be getting a 31 spline soon.
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Old 05-17-2007
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Yeah but i'd rather have the 4.56s for the Silver Lake Sand Dunes trip.

Its not that bad really, just a new install kit. I'll wait to do the 31 spline this fall.
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Old 05-18-2007
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i think im gonna need a new nickname here before to long... midwest diff guy or somthing.. lol
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Old 05-18-2007
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if the pinion bearing interchanges(i cant confirm, but beard says yes, and he has both), then id go ahead and set them up. 99% chance you wont hafta change anything when you swap them into the 31 spline housing.
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Old 05-18-2007
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Its my understanding that they will. They are both 8.8s

I will know 100% for sure this weekend as I'm installing the 31 spline.
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Old 05-18-2007
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Quote:
Originally Posted by Big04Ranger
i think im gonna need a new nickname here before to long... midwest diff guy or somthing.. lol
true that!
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Old 05-18-2007
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haha all the indy guys show up with the last 4 posts, nice!

Yeah if its not that big of deal i'll just have them in so i can sport the 4.56s for the dunes and swap the out later.

Thanks everyone.
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Old 05-18-2007
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Quote:
Originally Posted by 01xltranger4x4
haha all the indy guys show up with the last 4 posts, nice!

Yeah if its not that big of deal i'll just have them in so i can sport the 4.56s for the dunes and swap the out later.

Thanks everyone.
i would if i were you Mark....the 3.73's you got now are definately killing your tranny...i know with mine, my auto tranny saw temps of 250*+ on normal driving.....now imaging going up and over the dunes
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Old 05-18-2007
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he has 4.10s, i was there last year with 4.10s it was not horrible...
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Old 05-18-2007
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ahhh i just assumed he had 3.73's....
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Old 05-18-2007
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Nope 4.10s stock.

Idk i would try it if i had a trans temp guage so i could keep an eye on things.
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Old 05-18-2007
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then spend some of your rich's on 1

i think every auto tranny should have 1....
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Old 05-18-2007
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are the 4.56s gears transferable to the 31 spline axle? i didnt think they were...


so why spend the money on a 28spline when you are upgrading to a 31spline?
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Old 05-18-2007
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Quote:
Originally Posted by Gay-briel
are the 4.56s gears transferable to the 31 spline axle? i didnt think they were...


so why spend the money on a 28spline when you are upgrading to a 31spline?
the gear size doesn't matter......a 8.8 ring/pinion gear is the same, no matter the axle spline.....the axle spline only affects the carrier........

i could take my gears out of my 8.8 and put them in a '07 F-150 8.8.....they are all the same....
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Old 05-18-2007
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Quote:
Originally Posted by lifted97ranger
the gear size doesn't matter......a 8.8 ring/pinion gear is the same, no matter the axle spline.....the axle spline only affects the carrier........

i could take my gears out of my 8.8 and put them in a '07 F-150 8.8.....they are all the same....


yeah, i knew the carrier was different, just wasnt sure about the gears themselves
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Old 05-18-2007
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Quote:
Originally Posted by Gay-briel
yeah, i knew the carrier was different, just wasnt sure about the gears themselves
it is alright....that is a common misconseption...
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Old 05-18-2007
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Im probably going to get a trans temp guage before the dunes, but still go ahead with the 4.56s.

Zach said his trans with 4.10s/35s last year was running around 200.
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  #23  
Old 05-18-2007
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Quote:
Originally Posted by 01xltranger4x4
Im probably going to get a trans temp guage before the dunes, but still go ahead with the 4.56s.

Zach said his trans with 4.10s/35s last year was running around 200.
yea.....you should also get an external tranny cooler........i need to redo how mine goes from the tranny-->cooler-->radiator cooler to tranny-->radiator cooler-->cooler.....

i moved my tranny temp gauge sender unit to the little spot in the side of the tranny.....it reads more acurate temps there.....i haven't seen it above 150* since i did that...
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Old 05-18-2007
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Do these look right?

A-Pillar Mount

Trans Temp Guage

Now, i want the 2-guage mount pillar because i know i'll need another guage in the future (not saying which one Maurice shut up cause you know what it is, haha)

I need a 2 1/16 filler guage and could'nt find if on summits site or ebay, anyone help me out? I'd like it to match the trans temp guage if thats possible..
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  #25  
Old 05-18-2007
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they look right to me
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