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  #51  
Old 04-13-2017, 11:04 PM
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aliastel aliastel is offline
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I have used this calculator for years. Best one I have come across:

http://www.grimmjeeper.com
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  #52  
Old 04-19-2017, 08:34 AM
bri bri is offline
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I have 235/85 and 4.10 on '98 D1., these are 32". Runs higher RPM, but in the hills around here not so much of a problem. Speedo seems about 20% off. Don't notice that much difference in gas mileage, but that does not really bother me.

I have a bigger problem with whining gears.

Years ago I ran D1 with 235/85R16 and 255/85R16 and stock gears. 235 frustrating in mountains. 255 VERY frustrating in mountains at speed. Off road, not much engine breaking going down and slightly under powered going up.

I am confident that I will like they better on and off road, with the exception of whine.
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  #53  
Old 04-20-2017, 10:44 AM
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Quote:
Originally Posted by bri View Post
I have 235/85 and 4.10 on '98 D1., these are 32". Runs higher RPM, but in the hills around here not so much of a problem. Speedo seems about 20% off. Don't notice that much difference in gas mileage, but that does not really bother me.

I have a bigger problem with whining gears.

Years ago I ran D1 with 235/85R16 and 255/85R16 and stock gears. 235 frustrating in mountains. 255 VERY frustrating in mountains at speed. Off road, not much engine breaking going down and slightly under powered going up.

I am confident that I will like they better on and off road, with the exception of whine.
Can you give us any rpm/mph ranges?
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  #54  
Old 04-20-2017, 11:41 AM
Shiftonthefly1 Shiftonthefly1 is online now
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Quote:
Originally Posted by Frank4 View Post
Can you give us any rpm/mph ranges?
It's not gonna be 3500 at 55 I can tell ya that.
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  #55  
Old 04-20-2017, 06:40 PM
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Quote:
Originally Posted by Shiftonthefly1 View Post
It's not gonna be 3500 at 55 I can tell ya that.
Sure as hell isn't going to be 1900.
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1989 RR 122k ----> SOLD!!!
Equipped:
4.6
OME Shocks
RTE 2" Coils
Wilderness rack
Crawlers Treadwright (33")
2000 DII 156K = The Antichrist
Equipped:
RTE 3" coils
BFG A/T's 33"
SD rack
ARB front bumper
AB rear bumper
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  #56  
Old 04-20-2017, 07:15 PM
Shiftonthefly1 Shiftonthefly1 is online now
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Quote:
Originally Posted by Frank4 View Post
Sure as hell isn't going to be 1900.


I never said it would be you're the one that came out of the box with retarded claims and insults
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  #57  
Old 04-22-2017, 12:10 AM
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Quote:
Originally Posted by Shiftonthefly1 View Post
I never said it would be you're the one that came out of the box with retarded claims and insults
Um, your calculator that you posted says it a little over 1900 rpms @ 50 mph. So yes, yes you did.
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"If it has tits or tires it is going to give you trouble."
1989 RR 122k ----> SOLD!!!
Equipped:
4.6
OME Shocks
RTE 2" Coils
Wilderness rack
Crawlers Treadwright (33")
2000 DII 156K = The Antichrist
Equipped:
RTE 3" coils
BFG A/T's 33"
SD rack
ARB front bumper
AB rear bumper
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  #58  
Old 04-22-2017, 12:24 AM
Shiftonthefly1 Shiftonthefly1 is online now
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Quote:
Originally Posted by Frank4 View Post
Um, your calculator that you posted says it a little over 1900 rpms @ 50 mph. So yes, yes you did.
Ashcrift did sir. Not me. But yes it does sound about right...in fourth gear...in OVERDRIVE. But I guess you know more than Ashccroft does on the subject. Thanks for the wisdom!!
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  #59  
Old 04-24-2017, 06:46 PM
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Quote:
Originally Posted by bri View Post

Years ago I ran D1 with 235/85R16 and 255/85R16 and stock gears. 235 frustrating in mountains. 255 VERY frustrating in mountains at speed. Off road, not much engine breaking going down and slightly under powered going up.
I remember that truck! Many good times.

The gearing question always makes me laugh. I've run stock gears on 35s for 11 years. And on 33s several years before that. Granted, I'm a bit lighter. But only by 800 lbs. I'm finally going 4.1 as I go to 37s but wouldn't go any further. Remember: the further you go, the weaker you get. My advice, and it's worth what you paid for it, is for a rig that's both street and trail, make your compromises on the street performance. The lessons learned on the trail are more painful and expensive than the inconveniences faced the street.
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This state is largely retarded.


1996 Disco I 33s, armor, etc (sold, now on 35s, nasty)
1999 Disco II, (now Son #1's, on 35s)
2001 Disco II, chopped & caged, 37s, locked (Molly)
2004 Disco II, (now Son #2's, on 32s)
2008 L322 (DD)
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  #60  
Old 04-28-2017, 11:28 AM
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Quote:
Originally Posted by Shiftonthefly1 View Post
Ashcrift did sir. Not me. But yes it does sound about right...in fourth gear...in OVERDRIVE. But I guess you know more than Ashccroft does on the subject. Thanks for the wisdom!!
You posted it man. Jesus, at least I am sticking to my guns here.
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"If it has tits or tires it is going to give you trouble."
1989 RR 122k ----> SOLD!!!
Equipped:
4.6
OME Shocks
RTE 2" Coils
Wilderness rack
Crawlers Treadwright (33")
2000 DII 156K = The Antichrist
Equipped:
RTE 3" coils
BFG A/T's 33"
SD rack
ARB front bumper
AB rear bumper
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  #61  
Old 04-28-2017, 02:26 PM
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If the Ashcroft calculator is off, like really off, its because something was entered incorrectly.
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'98 D1 Trail Rig. Lockers and whatnot. Retired
'96 D1 Daily Driver. OME lift, 235/85/16 Toyo AT's.
'95 D1 Project Truck.
'94 D1 Too good to pass up. OME lift, 265/75/16 BFG AT's, Detroit/TruTrac, etc

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  #62  
Old 04-28-2017, 03:26 PM
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Anyone running 4.37's and 35's?
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  #63  
Old 04-28-2017, 04:54 PM
Shiftonthefly1 Shiftonthefly1 is online now
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Quote:
Originally Posted by Frank4 View Post
You posted it man. Jesus, at least I am sticking to my guns here.


You came at me at with insults and sarcasm. I didn't say anything to you I didn't say anything derogatory to anybody for some reason you got this thing up your ass about this thread. Your initial statement was wrong. I've got facts to back up that it was wrong. Why don't you just drop it move on and quit being confrontational. I have enough bullshit at work and in real life I don't need it here in my hobby Life too.

Let's make nice and kiss and make-up.
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  #64  
Old 04-30-2017, 02:54 AM
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Yeah, drop the bitch fest already ladies
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  #65  
Old 05-02-2017, 02:23 PM
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Quote:
Originally Posted by Shiftonthefly1 View Post
You came at me at with insults and sarcasm. I didn't say anything to you I didn't say anything derogatory to anybody for some reason you got this thing up your ass about this thread. Your initial statement was wrong. I've got facts to back up that it was wrong. Why don't you just drop it move on and quit being confrontational. I have enough bullshit at work and in real life I don't need it here in my hobby Life too.

Let's make nice and kiss and make-up.
Calmer than you are, dude.
__________________
"If it has tits or tires it is going to give you trouble."
1989 RR 122k ----> SOLD!!!
Equipped:
4.6
OME Shocks
RTE 2" Coils
Wilderness rack
Crawlers Treadwright (33")
2000 DII 156K = The Antichrist
Equipped:
RTE 3" coils
BFG A/T's 33"
SD rack
ARB front bumper
AB rear bumper
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  #66  
Old 05-02-2017, 04:42 PM
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rovercanus rovercanus is offline
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With 4:12's on 33" tires I run at about 2250 going 55mph.
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  #67  
Old 05-02-2017, 04:56 PM
Shiftonthefly1 Shiftonthefly1 is online now
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Quote:
Originally Posted by rovercanus View Post
With 4:12's on 33" tires I run at about 2250 going 55mph.


Nice. Not bad at all. Thanks man. I appreciate the info.
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  #68  
Old 08-03-2017, 12:44 AM
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CORover CORover is online now
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I ran across this formula recently;
Desired tire size divided by stock tire size times stock gear ratio equals new gear ratio.
33/29*3.54=4.03 go to the nearest available, like 4.11

29/29=1.000000000*3.54= 3.54
30/29=1.034482759*3.54=3.662068966
31/29=1.068965517*3.54=3.784137931
32/29=1.103448276*3.54=3.906206897
33/29=1.137931034*3.54=4.028275862
34/29=1.172413793*3.54=4.150344828
35/29=1.206896552*3.54=4.272413793

Here is what GBR has for a reference;
3.54, 3.9, 4.11, 4.14, 4.43, 4.71
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  #69  
Old 08-13-2017, 06:57 PM
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Quote:
Originally Posted by Frank4 View Post
You posted it man. Jesus, at least I am sticking to my guns here.
No pun intended?
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  #70  
Old 08-13-2017, 07:02 PM
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Quote:
Originally Posted by CORover View Post
I ran across this formula recently;
Desired tire size divided by stock tire size times stock gear ratio equals new gear ratio.
33/29*3.54=4.03 go to the nearest available, like 4.11

29/29=1.000000000*3.54= 3.54
30/29=1.034482759*3.54=3.662068966
31/29=1.068965517*3.54=3.784137931
32/29=1.103448276*3.54=3.906206897
33/29=1.137931034*3.54=4.028275862
34/29=1.172413793*3.54=4.150344828
35/29=1.206896552*3.54=4.272413793

Here is what GBR has for a reference;
3.54, 3.9, 4.11, 4.14, 4.43, 4.71

I do like the GBR 4.43 with reverse rotation for 33 - 35 tires.
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