Gear ratio

[jakeh937]

W/33's, and the 1:1 of your 4th gear, you could run 4:10 R&P without much issue.

I say the following, as someone who has setup R&P's for decades.

Watch someone doing this, before you decide or try it on your own.

R&P work, is one of the most precession and detailed jobs you can undertake in automotive work.

Among the tools you need, is a in/lb torque wrench, and a dial indicator that reads to .001". Along with a magnetic base for this indicator. You will also want a ft/lb t'wrench for the ring gear bolts, bearing cap bolts and pinion nut.

Hint: Stay away from 'crush-sleeves'. Make a solid spacer and use shims.



LG

Where could I get the shims and solid spacers if I decided to do that job?


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[Lumpy Grits]

Wish I knew about the AMC 232 i6 .
My AMC 258 i6 / 4.2l will run all day at 2600-2800 rpm and no issues. The AMC 258 i6 / 4.2l is RL'd at 4500rpm.
Shims come with most install kits. GOOGLE how to read a gear pattern while you're at it. You want the best pattern on the 'drive' side of the ring gear.
LG

 

[Torxhead]

What's your hi-way speed at 3K rpm?
Are you sure it really is 3K? Have you confirmed your tach is correct? My OEM tach reads 200-225 rpm high, at 3K rpm indicated.
THX,
LG

I use a multimeter Lumpy, and have tried various ones with the same results. The freeway tire pressure is around 28 lbs and the actual diameter is not a 33" so that changes the math from those calculated charts. I once got a deal on a brand new T-18 with a CJ adapter kit for a ridiculous price that I could not resist from Hicks in Pomona. This was way before those 4 to 1 kits came out. My 4:10s were pretty hard on the T5s that I had at the time.

 

[gert]

I use a multimeter Lumpy, and have tried various ones with the same results. The freeway tire pressure is around 28 lbs and the actual diameter is not a 33" so that changes the math from those calculated charts. I once got a deal on a brand new T-18 with a CJ adapter kit for a ridiculous price that I could not resist from Hicks in Pomona. This was way before those 4 to 1 kits came out. My 4:10s were pretty hard on the T5s that I had at the time.

I sure do hate how the tire manufacturers do not live up to their height claims, tires are cast into molds you would think you could get them more consistent


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[CJ]

AMC 232 i6 with comp cam and springs. Np435 mated to Dana 20


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~~~Among the tools you need, is a in/lb torque wrench, and a dial indicator that reads to .001". Along with a magnetic base for this indicator. You will also want a ft/lb t'wrench for the ring gear bolts, bearing cap bolts and pinion nut.
Hint: Stay away from 'crush-sleeves'. Make a solid spacer and use shims.

LG

Where could I get the shims and solid spacers if I decided to do that job?


Sent from my iPhone using Tapatalk

Your OK, CJ AMC 20s do not use crush sleeves.

But, building an axle is not for a new person (as stated).

See -->> Jeep CJ7 & CJ8 Scrambler Axle Parts |AMC Model 20 Rear Axle

 

[jakeh937]

Your OK, CJ AMC 20s do not use crush sleeves.



But, building an axle is not for a new person (as stated).



See -->> Jeep CJ7 & CJ8 Scrambler Axle Parts |AMC Model 20 Rear Axle

Do dana 30s use crush sleeves? I'm also thinking about adding some sort of locker, what's involved with installing something of that sort?


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[hagar]

Your OK, CJ AMC 20s do not use crush sleeves.

Yes they do.

 

[mtnwhlr]

I can't speak about a CJ but I had a '68 Charger running 3.91s and now have a '78 1ton dually that has 4.10s and at 60mph they are running 3300 to 3600 rpm.

 

[tarry99]

Do dana 30s use crush sleeves? I'm also thinking about adding some sort of locker, what's involved with installing something of that sort?
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Hunting , Mountains , Lockers & Gear Ratios?

I think you should reevaluate what direction you're going in..........Hunting , mountains, off road or pleasure on the freeway........because it's pretty hard to have it all...............I've hunted all over the Cally Coast and Nor-Cal and the Sierras and just about anywhere you're chasing deer or Pigs in California can be very challenging....3:53 to 3:73 gear ratios with a 2:1 Transfer Case and 33" tires will suck off road.....even if you have the 6.68 gear in your NP-435 which will only help in low gear.............Low gears in the axles and Overdrive in 4th or a lower gear in the Transfer Case , to capture both ends of the spectrum.

 

[jakeh937]

Hunting , Mountains , Lockers & Gear Ratios?



I think you should reevaluate what direction you're going in..........Hunting , mountains, off road or pleasure on the freeway........because it's pretty hard to have it all...............I've hunted all over the Cally Coast and Nor-Cal and the Sierras and just about anywhere you're chasing deer or Pigs in California can be very challenging....3:53 to 3:73 gear ratios with a 2:1 Transfer Case and 33" tires will suck off road.....even if you have the 6.68 gear in your NP-435 which will only help in low gear.............Low gears in the axles and Overdrive in 4th or a lower gear in the Transfer Case , to capture both ends of the spectrum.

What gears do you run? My experience has been quite different. We go deer hunting up north and our group has a stock 79 CJ5 and so far it's trucked everywhere we've ever wanted to go.


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[Lumpy Grits]

I use a multimeter Lumpy, and have tried various ones with the same results. The freeway tire pressure is around 28 lbs and the actual diameter is not a 33" so that changes the math from those calculated charts. I once got a deal on a brand new T-18 with a CJ adapter kit for a ridiculous price that I could not resist from Hicks in Pomona. This was way before those 4 to 1 kits came out. My 4:10s were pretty hard on the T5s that I had at the time.

What tires where you using? I run 33 BFG/AT on 8" wide wheels and I'm 'rite' at 33" at 26psi.
My T-5 and 4:88 R&P are very happy on the hi-way @ 65mph........
The AMC20 's do use crush sleeves. The 30 does not.........
LG