swapping 2 bigger diffs

[Spartacus]

ive consulted a couple of people an businesses to seek info on
swapping to wider axles of a different make.

vehicle: 2.8L rocky LWB
(offset transfer to drivers side)

ive gone for either MQ, bundy

would the heavy weight of the MQ/bundy axles be balanced out
by higher gearing. Eg: 4.5/4.6

Mull

[Spartacus]

who has changed axles to something bigger?

[ZOOK60]

i put 60s diffs under the zook worked out good also has a offset tranfer.
i dont think the wieght really made much of a difference guess you could put a set of extractors on and it would probly make up for it.Also you need to work out how much width you want also and gearing needs

[Spartacus]

im after gearing around 4.3/4.5
and width around 1400/58"

[dumbdunce]

ive consulted a couple of people an businesses to seek info on
swapping to wider axles of a different make.

vehicle: 2.8L rocky LWB
(offset transfer to drivers side)

ive gone for either MQ, bundy

would the heavy weight of the MQ/bundy axles be balanced out
by higher gearing. Eg: 4.5/4.6

Mull

why not just trade your junk for a bundy or MQ?

if you insist on the swap, the bundy is the easier swap with bolt-on steering arms, and a great variety of arms available both factory and aftermarket for high steer etc, a greater variety of ratios available, high pinion front and no real difference in strength.

bundy axles aren't all that heavy either - ig you want to offroad it, more weight down low is good.

cheers

Brian

[Spartacus]

i believe lockers can take u further as well as change in stud pattern allows for greater variety for deeper dish wheels.
im aiming to mod the rocky into a half competitive rig to enter registerd classs events and due to its poor COG requires the swap for safety.

when changing diffs how do u remove the old mounts

atm im trying to get measurement for MDF templates so i can fully prep the placements of new mounts to make it quicker and easier.

thanx for the help so far

Mull

[dumbdunce]

i believe lockers can take u further as well as change in stud pattern allows for greater variety for deeper dish wheels.
im aiming to mod the rocky into a half competitive rig to enter registerd classs events and due to its poor COG requires the swap for safety.

if it's not a viable platform to start with, don't start there! you will end up spending far too much $$ to get a nearly capable rig. If you start with a GQ or 75 series or similar in the first place, you start with an already capable platform, and your $ takes it so much firther up the track. you already know the rocky gear is too weak, too tall, and too narrow, and changing the diffs won't cure it all.

when changing diffs how do u remove the old mounts

angle grinder, gas axe, hacksaw, file - getting the old bits off your axle and/or chassis is the easy bit - the trick is in gettting the new mounts all welded on in exactlythe right places.

atm im trying to get measurement for MDF templates so i can fully prep the placements of new mounts to make it quicker and easier.

thanx for the help so far

Mull

if you have never done something like this before, seriously, get the hands-on help of someone who has already done it. Double or triple your intended budget, and don't start until you've got that money in the bank, otherwise your rig will be off the trail for a long time and chances are it will become one of those "unfinished projects" we see so often in the trading post.

I'm not saying DON'T DO IT but think and plan before you start, and if you think it's not a worthy vehicle for a comp truck (and the number of rockys on the comp scene would tend to indicate to me that it probably isn't) then think about starting somewhere else.

cheers

Brian