have you regeared?

[wanderer]

just got my jeep back from getting new tire recons37 -11.5 s with method wheels have reconfigured for this yet BUT wow the jeep doest see 7th or 8th unless i manually make it shift points are crazy like 3500 rpm i already have 456 gears so i was really bummed out by this hopefully when i reset everything with the tazer it will clear things up
i really dont want to regear but if it does substantially improve i will have to then the question becomes 513 or 488
iwas totally happy with the stock 456 and just wanted to get a couple of inches of extra space under it
it seems like everything i do to the jeep takes me down a rabbit hole and not in a good way

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[GabeBoyTheGreat]

Not yet, and may not ever. We will see. Currently on 35's at 4.10 in the manual. No issues on or off road. Going to 37s next week and going to see how it feels before deciding to regear. I'm told I probably won't need it but we will see how it feels. My initial thoughts...current tires are 75 lbs a piece and new tires will be 80 lbs a piece. Not a big jump. I may not feel it.

When you go to bigger tires, the tire diameter is an important variable to consider, regardless of weight.

When you go from 35 to 37, you are increasing the diameter by about 6%. That means in any gear for a any specific speed, your torque will be about 6% less just from the gearing. There will likely also be torque loss from the engine because you will be running about 6% lower RPMs.

 

[wanderer]

it should say does not see 7th or 8th

 

[wreck99]

When you go to bigger tires, the tire diameter is an important variable to consider, regardless of weight.

When you go from 35 to 37, you are increasing the diameter by about 6%. That means in any gear for a any specific speed, your torque will be about 6% less just from the gearing. There will likely also be torque loss from the engine because you will be running about 6% lower RPMs.

Thank you. That makes sense. As long as its drivable in all conditions I will wait and see how it feels first before deciding.

 

[3TV]

just got my jeep back from getting new tire recons37 -11.5 s with method wheels have reconfigured for this yet BUT wow the jeep doest see 7th or 8th unless i manually make it shift points are crazy like 3500 rpm i already have 456 gears so i was really bummed out by this hopefully when i reset everything with the tazer it will clear things up
i really dont want to regear but if it does substantially improve i will have to then the question becomes 513 or 488
iwas totally happy with the stock 456 and just wanted to get a couple of inches of extra space under it
it seems like everything i do to the jeep takes me down a rabbit hole and not in a good way

After you reset parameters with your Tazer keep in mind that it also takes a short time for your Jeep computer to relearn your driving habits and the new parameters. The Jeep will probably feel better after a day or two than it does right after using the Tazer.

 

[Ratbert]

We're bringing our wife's?
If I'm going out it's to get some peace and quiet.
The mall quips are getting old, like a record that keeps skipping and repeating itself...

Yep, some of us chose wives the we enjoy doing stuff with. Who woulda thought?

 

[zouch]

you need to get used to the idea that if you're going to change something, you're likely going to need to change something else, too. it's all inter-related.
doing it right isn't as cheap/easy as we might wish, but enough people have done it before you that you should be able to know what you're getting into. changing tires changes drive ratio; correct by changing dif gear ratio.
expect that there's going to be a high likelihood that you're going to need to do something to get that bigger larger spare to fit now too. (you *did* get a matching spare, right?)

regardless of how well you plan, embrace your new mantra:
Modify, and Correct.

just got my jeep back from getting new tire recons37 -11.5 s with method wheels have reconfigured for this yet BUT wow the jeep doest see 7th or 8th unless i manually make it shift points are crazy like 3500 rpm i already have 456 gears so i was really bummed out by this hopefully when i reset everything with the tazer it will clear things up
i really dont want to regear but if it does substantially improve i will have to then the question becomes 513 or 488
iwas totally happy with the stock 456 and just wanted to get a couple of inches of extra space under it
it seems like everything i do to the jeep takes me down a rabbit hole and not in a good way

 

[Ratbert]

just got my jeep back from getting new tire recons37 -11.5 s with method wheels have reconfigured for this yet BUT wow the jeep doest see 7th or 8th unless i manually make it shift points are crazy like 3500 rpm i already have 456 gears so i was really bummed out by this hopefully when i reset everything with the tazer it will clear things up

That's expected if you haven't told the computer about the new tire size.

Note that you're going faster than what the speedo says too.

 

[zouch]

my thought exactly.

Yep, some of us chose wives the we enjoy doing stuff with. Who woulda thought?

 

[wanderer]

yep its first on the list to do today tazer so I haven’t read the instructions yet cause I’ve only done the TPMS but what tire size do I enter or 37 do I do a chalk test or just enter diameter? and on another note what is the cost of regearing?
Is it better to do it at the dealer so that it’s warranty and if I end up buying an extended warranty that should be covered as well?
Or should I do it at a well qualified shop?

 

[jadmt]

yep its first on the list to do today tazer so I haven’t read the instructions yet cause I’ve only done the TPMS but what tire size do I enter or 37 do I do a chalk test or just enter diameter? and on another note what is the cost of regearing?
Is it better to do it at the dealer so that it’s warranty and if I end up buying an extended warranty that should be covered as well?
Or should I do it at a well qualified shop?

The inventor of the procal told me to get spot on measure from the center of the hub to the ground on flat level surface and times that by 2 and use that number.....not sure if taser is the same but worth a try and then either go up or down in small increments from there to get dialed in...use a stand alone gps or speedometer smart phone app.

 

[wanderer]

here is another really dumb question but I just don’t know the answer to it
What would happen if you programmed with a taser that you have 488 gears when you really have 456 gears?
It’s only like a 7% difference with the computer. Just read that horsepower and torque down a little bit or something entirely unforeseen happen?

 

[grimmjeeper]

yep its first on the list to do today tazer so I haven’t read the instructions yet cause I’ve only done the TPMS but what tire size do I enter or 37 do I do a chalk test or just enter diameter? and on another note what is the cost of regearing?
Is it better to do it at the dealer so that it’s warranty and if I end up buying an extended warranty that should be covered as well?
Or should I do it at a well qualified shop?

You need actual rolling diameter. Advertised size (i.e. 37") is too big. Even the OD measurement in the specs is usually too much. If they have a Revs Per Mile in the spec, use that

20,168 ÷ revs per mile = rolling diameter

Another good way is to get the tires inflated to the pressure that gets the best chalk test. Then measure from the center of the wheel to the ground. Multiply that by 2. Use that. Then double check it against a GPS. Adjust as needed.

 

[grimmjeeper]

here is another really dumb question but I just don’t know the answer to it
What would happen if you programmed with a taser that you have 488 gears when you really have 456 gears?
It’s only like a 7% difference with the computer. Just read that horsepower and torque down a little bit or something entirely unforeseen happen?

It will alter the shift points in the automatic transmission. Not a whole lot more.

 

[jadmt]

here is another really dumb question but I just don’t know the answer to it
What would happen if you programmed with a taser that you have 488 gears when you really have 456 gears?
It’s only like a 7% difference with the computer. Just read that horsepower and torque down a little bit or something entirely unforeseen happen?

no you do not want to do that....program it for what you have.

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