Has any one done 4.3s in 80

[mickdirt]

I know I can get a front one from a 100, but am told the rear from a 100 is a 9.5'' were as the 80 is a 9''.. any help would be tops...

[Red Rover]

What tyres are you running?

I run 285's on both 80's

I have 4.55 gears in a petrol auto - perfect

I had the 4.55's in the TD 80 5 speed - too low on the highway

Same thing as you, i wanted 4.3's but couldn't get them for the rear. As it turned out the 4.55's were good in the auto.

When I had the 35's on the diesel 80 it was good with the 4.55's though.

Hope it helps.

[dumbdunce]

they are available new in 4.3, 4.56, 4.875, 5.1 and probably 5.3.

transfer gears are a better option.

[mickdirt]

Running 35's now, but prob going back to 33's was going 4.56 but have been told they are hard to get for the front, and wit them in it's to low for hiway stuff, thats why I was looking at 4.3 from a 100..

[dumbdunce]

which engine do you have? in most 80's, the factory 4.1's are ideal with 35's on the highway, helps keep the revs reasonable.

[mickdirt]

A 1hz with axt turbo, and the gear gox out of a 1hdt with the higher 1st and 2nd gear.. I just wonted to drop it a bit. I see snake sell's 4.3's I just wona know if i gota grind the rear housing. or if it's a easy in stall..???

[mickdirt]

Just wondering about the transfer gears can ya get em to lower the high range to???[/quote]

[dumbdunce]

A 1hz with axt turbo, and the gear gox out of a 1hdt with the higher 1st and 2nd gear.. I just wonted to drop it a bit. I see snake sell's 4.3's I just wona know if i gota grind the rear housing. or if it's a easy in stall..???

they are "bolt in" in the sense that there's nothing to cut, but you need the skillz and tools to set up a diff or pay someone to do it.

as for transfer gears they only affect low range gearing, the 1HZ is happy with low revs, peak torque is around 2000rpm so keeping the high range gearing tall should make it happy. a turboed 1HZ should happily turn 35's with stock gearing at illegal speeds on most freeways

[mickdirt]

Dont get me worng she getts along well but was better with smaller tires, I got no probs building diffs just havent done cruser ones, we got all the tools, and got a full machine shop if it comes to that..
Thanks for the help!!

[simkell]

Just wondering about the transfer gears can ya get em to lower the high range to???

[/quote]

i'm sure terrain tamer did a high and low gear reduction for the cruiser t-case but was expensive compared to just low range reduction. doing the diffs worked out cheaper from memory.