Iant333

A friend is willing to sell me a cheap set of 4.10 gears out of his 27 spline 8.25, though the problem is is that my diff is a 29 spline, just wondering if they are compatible, since I think the only difference was the axle shaft size, correct? Just wondering, thanks.

nick_n_ii

You'd have to have them installed on your carrier..

That's the only difference is the carrier cause of the different spline count.

Iant333

So potentially I could buy them, and put them on without any extra parts then? Its just a ring and pinion gears set. Sorry if I seem uneducated, im not too familiar with advanced differential work.

winston427

You will need to have the gears set up for proper clearances. It would be wise to have new bearings and seals installed at the same time.

DEVILSTOY

they might not work at all , and i found out the hard way , depending what your stock gearing is . if you have 3:55 like most , they probly wont work with out getting a new carrier , theres a dividing point in gears usually 3:73 where if you jump to a taller gear you need a carrier made for those gears , the reason is ..... the pinion is smaller and theres not enough room to properly shim the carrier over to get proper mesh , the new carrier made for taller gears has the part where the ring gear bolts too is shifted over to compensate for the smaller pinion , so im gonna say your gonna need a new carrier wich should run around 80 bucks , i put detroits in mine that were set up for the taller gears

Iant333

Ok I guess ill need a new carrier. Thanks for the help.

DEVILSTOY

yea but you said the carrier was a differant spline , so it wouldnt work

Donnie_K

yep, the gears will work, just need a 29 spline carrier that will accept those gears.

PingPong

If you wanted to use just the gears and the carrier break was right you could use it. I would call around and find out how much the right carrier and spider gears are. You will not be able to use the spider gears either.

ktmracer419

there is no carrier break on an 8.25

and there arent specific 27-29 spline carriers



put simply: IT WILL WORK

DEVILSTOY

when i bought my detroit locker for my 8.25 they specifacly asked me my gear ratio

ktmracer419

probably just a generic question they ask seeing most axles do have a carrier break.

where did you buy it from?

DEVILSTOY

quadratec

djlarroc

That's EXACTLY what I was thinking. There is only a carrier break in the D30, not the 8.25. When I did all my research for changing gears and installing lockers, I only came accross needing a new carrier for the D30. 3:55 and down/3:73 and up (numerically).

DEVILSTOY

hmmm , but either way hes gonna have to gear the front to match , unless its 2wd