the perfect differential gearing?

yeager_0339 · Sep 7, 2016

Okay guys so in the next few months I will be doing a complete chasis swap, Trans swap , and build up. But I am stuck as to what gearing to go with in my axles so I figured id reach out to yall and pick your brain. So my drive train will be as follows

ENGINE: LS1 5.7 (400 HP)

TRANSMISSION: TH350 (2400 STALL)

TRANSFER CASE: DANA 300 ( 4:1)

DANA 60 FRONT: CURRENTLY 456

14 BOLT REAR: CURRENTLY 456

Im not planning on doing any Bobby Tanner Hill shooting but would like to have the best set up for crawling and trail riding with a minor case of skinny pedal. so whats your thoughts?

smbroady82 · Sep 7, 2016

4 speed atlas :dblthumb:

We know you have deep pockets

muddinmetal · Sep 7, 2016

Honestly with a 60, 4.56 is as low as you want to go for maximum strength, especially a lp front. The pinion starts getting tiny after that. It and a 4 to 1 case are about perfect for crawling and the occasional mashing in the SE in my opinion

tonybolton · Sep 7, 2016

Re:

4.88s
LP 60 / 14 bolt
5.7 V8 250hp?
TF727 auto
Atlas 4.3
43s

I thought the 4.1 d300 I had before was nice....but once it junked the front output the 4.3 atlas gave me a great creeping 1st....powerful 2nd....Trail riding 3rd gear.

Very happy with the combo.

jeeppoor · Sep 7, 2016

5.38
60Lp/60
AW4 trans
4.0 inline
Dana 300 / 4-1
42 pitbulls
I like the setup so far.
I have even been able to hang with Tony the couple times we have wheeled with him. ;D

yeager_0339 · Sep 7, 2016

I guess I for got to include that I am running 43" tires.

yeager_0339 · Sep 7, 2016

smbroady82 said:
4 speed atlas

We know you have deep pockets!

Not as deep as yours!

tonybolton · Sep 7, 2016

Re: Re: the perfect differential gearing?

yeager_0339 said:
I guess I for got to include that I am running 43" tires.

Isn't everyone? 8)

Neal3000 · Sep 7, 2016

Poor little D300 :'(

yeager_0339 · Sep 7, 2016

SOO my understanding is that for the strongest stay with the 4.56 gears but 4.88 would be the perfect setup? I don't know that il change gears just to go to 4.88 ratio.

tonybolton · Sep 7, 2016

Re:

Your hp and 456s.....I'd say you're fine. That d300 would be my focus.

1tonrenegade · Sep 7, 2016

410s an an just mash yer motor.... Well that works for me!

smbroady82 · Sep 7, 2016

Re: Re: the perfect differential gearing?

tonybolton said:
Isn't everyone? 8)

Nah, not all of us need 43s to make climbs

smbroady82 · Sep 7, 2016

yeager_0339 said:
Not as deep as yours!

lol, you're in bad shape then my friend! all my toy money goes to tuition

yeager_0339 said:
SOO my understanding is that for the strongest stay with the 4.56 gears but 4.88 would be the perfect setup? I don't know that il change gears just to go to 4.88 ratio.

I wouldn't spend that kind of money to go from 4.56 to 4.88 either

wimpykid · Sep 7, 2016

I think the gearing is good.

I'm running 4.88 w/C6 and STAK 3spd with 44 TSLs. I run in 3.0:1 and it does good.

tonybolton · Sep 7, 2016

Re: Re: the perfect differential gearing?

wimpykid said:
I think the gearing is good.

I'm running 4.88 w/C6 and STAK 3spd with 44 TSLs. I run in 3.0:1 and it does good.

I was gonna ask you if you lost anything going from manual to C6. Whatcha think so far?

kmcminn · Sep 7, 2016

Yeager your jeep's gearing is real close to mine. I love the gearing in mine. I can crawl in first or stall it up in 2nd to get a little more wheel speed. For what a gear swap is going to cost you. You could probably sell your 300 and use the gearing money to nearly pay for new atlas. If you want to change you gearing.

39s
4.10
4.3 case
Th350 2500 rpm stall
V8