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Old 04-10-2019, 11:14 AM   #26 (permalink)
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So im tired of having to down shift at the slightest hill its time to regear looking for opinions on what to gear to. I have dana 60 front and 14b ff rear it has 4.10 now but its a big heavy mother it weighs between 7500 and 8000 when loaded for trips. On 37in tires stock 350 tbi 700r4 np241 t case . I was thinking either 4.88 or 5.13 but would like some opinions. It is street driven long distances to trails ect... but not daily driven looking for something that i can still drive 70+ without reving too crazy. Any recs appreciated. Also are yukon ring and pinnion and rebuild kits the way to go?

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i use this for any rpm vs mph questions but as for strength maybe someone else will chime in
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Old 04-10-2019, 11:40 AM   #27 (permalink)
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Rig looks good. Planning on being up at the park much this summer?
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Old 04-10-2019, 03:13 PM   #28 (permalink)
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Gear Ratio Calculator



i use this for any rpm vs mph questions but as for strength maybe someone else will chime in
Thanks ill check that out but im not sure what i want my crusing rpm to be

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Old 04-10-2019, 03:14 PM   #29 (permalink)
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Rig looks good. Planning on being up at the park much this summer?
Dont go there much ive wheeled all that my truck fits on a few times

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Old 04-10-2019, 04:36 PM   #30 (permalink)
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I would think 4.88 would be good if you plan to stick with the 350\700r4 and 37's combo, depending on true height of your 37's. I guess it really depends on how high rpm you feel ok with @70 really.

According to gear calculator @70MPH with a true 37" tire.
4.10=1824 rpm
4.88=2171 rpm
5.13=2283 rpm
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Old 04-10-2019, 08:59 PM   #31 (permalink)
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ORD makes a few heights of shackle flip. Measure the block height and see what kit you need.

For your desired use, my next purchase would be a winch. Then armor. Then lockers. I'd go selectable on a dual purpose vehicle.

Add fire extinguisher, first aid kit and peel out.
This right here.
I have a 93 v3500.
+1 on nice rig.
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Old 04-11-2019, 09:58 AM   #32 (permalink)
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This right here.

I have a 93 v3500.

+1 on nice rig.
Thanks and already did the ord shackel flip and got the fire extinguisher first aid kit and front and rear bumpers and winch ill have to updat my thred with some fresh pics when the weather gets better here.

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Old 04-11-2019, 09:59 AM   #33 (permalink)
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I would think 4.88 would be good if you plan to stick with the 350\700r4 and 37's combo, depending on true height of your 37's. I guess it really depends on how high rpm you feel ok with @70 really.

According to gear calculator @70MPH with a true 37" tire.
4.10=1824 rpm
4.88=2171 rpm
5.13=2283 rpm
Thats what ive been seeing on the calculators. Only prob is im not sure whats a good rpm at hwy speeds. I think im going to look up the factory gear ratios and tire size and run the calculations on that then use that as a guid line for whats a good hwy rpm

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Old 04-11-2019, 07:03 PM   #34 (permalink)
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With as clean as that truck is you might still have the sticker in glovebox that would have code for ratio. Since yours was originally a 1500 with 700r4 I would bet it had 3.42's in it or maybe the 3.73 if towing package.

Stock tires should be 235\75R15 ( I cant believe these ever looked normal under these trucks)

So stock 235's @70MPH would be
3.42's=1950 rpm
3.73's=2126 rpm
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Old 04-11-2019, 07:38 PM   #35 (permalink)
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Originally Posted by 350TacoZilla View Post
With as clean as that truck is you might still have the sticker in glovebox that would have code for ratio. Since yours was originally a 1500 with 700r4 I would bet it had 3.42's in it or maybe the 3.73 if towing package.

Stock tires should be 235\75R15 ( I cant believe these ever looked normal under these trucks)

So stock 235's @70MPH would be
3.42's=1950 rpm
3.73's=2126 rpm
I just did the same calculations i think i will go the 5.13 gears. It would only be a little higher cruising rpm and i think that higher cruising rpm is not too high and being a little closer to the peak tq rpm of my engine. Thanks for the help

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Old 04-11-2019, 07:47 PM   #36 (permalink)
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Glamor shot

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Old 04-11-2019, 09:07 PM   #37 (permalink)
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Originally Posted by mrgoodwrench1985 View Post
So im tired of having to down shift at the slightest hill its time to regear looking for opinions on what to gear to. I have dana 60 front and 14b ff rear it has 4.10 now but its a big heavy mother it weighs between 7500 and 8000 when loaded for trips. On 37in tires stock 350 tbi 700r4 np241 t case . I was thinking either 4.88 or 5.13 but would like some opinions. It is street driven long distances to trails ect... but not daily driven looking for something that i can still drive 70+ without reving too crazy. Any recs appreciated. Also are yukon ring and pinnion and rebuild kits the way to go?

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Old 04-29-2019, 08:22 PM   #38 (permalink)
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Looks good lots better than when you started
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Old 05-03-2019, 08:44 AM   #39 (permalink)
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That's a clean looking Suburban! We sell a ton of Yukon gears. Easy to set up too if you are doing it yourself. They also have a lifetime warranty if you add that upgrade. Give us a shout and we can figure out a package for you. 706-559-9609 (if you still need them. none of the other posts were showing when we responded!)
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Old 05-22-2019, 08:37 PM   #40 (permalink)
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Originally Posted by 350TacoZilla View Post
With as clean as that truck is you might still have the sticker in glovebox that would have code for ratio. Since yours was originally a 1500 with 700r4 I would bet it had 3.42's in it or maybe the 3.73 if towing package.

Stock tires should be 235\75R15 ( I cant believe these ever looked normal under these trucks)

So stock 235's @70MPH would be
3.42's=1950 rpm
3.73's=2126 rpm


They didnít look normal. I had a 2wd 83 suburban and it looked normal with 31ís.


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