FJ62 with H55F

[Front Range 4x4]

Hi Folks, I'd like to hear from people who have a 3FE and H55F regarding gearing and tire size performance.

I touched on this is my thread about my A440F biting the dust (https://forum.ih8mud.com/60-series-wagons/219832-a440f-bites-dust.html)

From what I've been able to find the stock gearing is fine with 33's which is my setup but it's always nice to hear and see what others are running.

In answer to the inevitable question: No, I'm not doing it myself for many reasons. A big reason is that my 62 is four hours away.

 

[NocalFJ60]

The stock 4.11's in your 62 and 33's work great. You should be about 2600-2700 rpms at 65 mph. Sorry to hear about your transmission.

 

[overhanger]

Just for comparison sake FJ62 w/ A440F and 4.88s and 33s 2500 rpm = 70 mph

 

[Front Range 4x4]

Hoping my FJ55 doesn't sell before I get the 62 back so I can swap the 4:88's into the 62.

 

[REKCUT]

I am a little fuzzy on the above quotes.

Norcalfj60 had 33's and 4:11 doing 65 at 2600 to 2700 rpms
Overhanger has 33's and 4:88 doing 70 at 2500 rpms.

I am either missing something in the equation or one of these two is off. I tend to lean to Norcalfj60's estimate.

As to a choice on gears I think it depends on what you want to do. With the 5spd your talking about you will have a granny first and could have a decent low with a good highway speed. If you want to play more and commute less then the 4:88 would fit in perfect.

 

[overhanger]

Thanks for the vote of confidence, homey! What's to not understand? Two different trannies with different final drive ratios and two different readings. My numbers are accurate as are NocalFJ60's numbers. 33s with stock 4.11s behind the 3FE/A440F is closer to 75 mph at 2500 rpm.

 

[RredFJ40]

I am a little fuzzy on the above quotes.

Norcalfj60 had 33's and 4:11 doing 65 at 2600 to 2700 rpms
Overhanger has 33's and 4:88 doing 70 at 2500 rpms.

I am either missing something in the equation or one of these two is off. I tend to lean to Norcalfj60's estimate.

As to a choice on gears I think it depends on what you want to do. With the 5spd your talking about you will have a granny first and could have a decent low with a good highway speed. If you want to play more and commute less then the 4:88 would fit in perfect.

I'm pretty sure that Norcal is basing his number on his 60 while Overhanger is basing his on a 62. The A440F has an OD on it resulting in lower RPMS

As for me, I'm doing 65 or so at 2500RPMS with 33s and 3.70s with an H42.

 

[REKCUT]

This is why I asked and didnt just jump in calling foul. Having always had a 60 i didnt realize that the 62 had that big of drop off in gear ratio. I run with a 62 who just put on 33's and I could swear that he was around that with his stock 4:11's but I have been wrong many times before. I also in the high 60's at around 25rpm's

 

[Front Range 4x4]

That's alright Rekut, I'm getting confused here too.

Are any of these posted 3FE's with H55F's?

Steve, I know your not and hope to be able to compare with your A440F+

 

[Aseif007]

I posted this in the other thread but here is goes again.

3FE/1.08:1 (%8 underdrive) transfer case high range ratio /3.7 diff gears/ and new 32X11.50s, I turn 2650 RPMs (reading taken from stock tack) doing 70 MPH (GPS verified). It will be a little lower with 33s. According to my calculations going from 3.7 to 4.11 is about an %11 change.

 

[NocalFJ60]

Are any of these posted 3FE's with H55F's?

The 3FE has about 15 more hp than a 2F if I remember right. So the added horsepower in your 3FE is the only difference. The rpm's will be the same on any engine with the same drivetrain. You live in Colorado so I would stay at close to stock gearing with all the hills. The H55F & 4.11's with 33's is basically very close to stock gearing. You could go to 4.56 to help out on the hills and offroad but your top speed will suffer. You are still going to be the slow traffic like your bumper sticker says.

 

[overhanger]

The '82 FJ60 transfer case output gear ratio is different from the '85 and newer 60 and 62 splitcase ratio. The FJ62 drivetrain with 4.88s and 33s is within a percentage point or two of stock 4.11s with the OEM 28" tire diameter. The two guys that I know of that have the setup you are asking about Chris are David Dunbar and Mitch Rowland if you want to search for some specific help. They both hang here and at the 3FE list.

 

[roscoFJ73]

The stock 4.11's in your 62 and 33's work great. You should be about 2600-2700 rpms at 65 mph. Sorry to hear about your transmission.

x2 but I thought mine revved lower than that at 65mph,more like 2500

 

[Yspen]

See this thread : https://forum.ih8mud.com/60-series-wagons/201134-4-56-ratios-who.html

There are some calculations we made . Nocalfj60 did most .
I did some real life test , but that is with 3F not 3FE and Africa spec cruiser .

In short : A quote from the post

I did some tests ( done at sea level )
I first put some 31" tyres on my car (4,11:1)
and found the speed/rpm data to correspond exactly with the data you published as 4,11:1 / 33" combo (????)
in short : rpm/kph
1500/65
2000/91
2500/113

Then I put my 33" tyres on a friend's car ( same car as mine , same year, engine etc but with 4,88:1 gearing - he normally runs on 35" tyres)
that data corresponded very well with the data you published for that combo (4,88:1;33";h55f) :
In short :rpm/kph
2000/75
2750/100
3000/110

Then I checked my car as is ( all tests done with GPS ) 4,11:1 , 33" tyres .
In short: rpm/kph
2000/100
2500/121

So in theory the 4,56 gearing would give me the correction I am looking for (?)
In theory :
2000rpm=85 kph
2500rpm= 108kph estimated



I decided to regear to 4,56 - and it is getting done next week .

 

[Front Range 4x4]

The 3FE has about 15 more hp than a 2F if I remember right. So the added horsepower in your 3FE is the only difference. The rpm's will be the same on any engine with the same drivetrain. You live in Colorado so I would stay at close to stock gearing with all the hills. The H55F & 4.11's with 33's is basically very close to stock gearing. You could go to 4.56 to help out on the hills and offroad but your top speed will suffer. You are still going to be the slow traffic like your bumper sticker says.

See this thread : https://forum.ih8mud.com/60-series-wagons/201134-4-56-ratios-who.html

There are some calculations we made . Nocalfj60 did most .
I did some real life test , but that is with 3F not 3FE and Africa spec cruiser .

Thanks everyone! Yspen, thanks for your info which I failed to find when I searched.

Kevin, special thanks for the great details in the referenced thread. Yes, I will always be "slower traffic" which is good, life's too short to race through it.

 

[NocalFJ60]

Kevin, special thanks for the great details in the referenced thread. Yes, I will always be "slower traffic" which is good, life's too short to race through it.

Those numbers should be close in the other thread but I got a lot of new numbers I measured with my new tires and am going to add them to my spreadsheet to make it more accurate. I am trying to post it up in a webpage format so everyone can try it out.

 

[Front Range 4x4]

Looking forward to it Kevin.

 

[RredFJ40]

The '82 FJ60 transfer case output gear ratio is different from the '85 and newer 60 and 62 splitcase ratio. The FJ62 drivetrain with 4.88s and 33s is within a percentage point or two of stock 4.11s with the OEM 28" tire diameter. The two guys that I know of that have the setup you are asking about Chris are David Dunbar and Mitch Rowland if you want to search for some specific help. They both hang here and at the 3FE list.

When I first read your post I went "oh yeah, duh" But then it hit me (quite a bit later) The out put ratio is only different in Low Gear - High gear is all 1:1 no matter the year.

 

[Yspen]

My 4,56 gears are in . ( 3F , H55F, 33" )

Unfortunately the speedo and odometers are way out .

But initial estimates driving in an convoy checking what the GPS speed is via radio )

2600 rpm = 105 kph
2800 rpm = 120 kph

( I will borrow a GPS and get the correct figures soon )

So going 33" is an slight overcorrection but off-road the car rocks .

 

[CardinalFJ60]

Apples to oranges comparison...

Hey man! you'll love that 5spd! and here's my apples to oranges comparison.

In my 60 that needs a carb-rebuild and has a cracked EGR flange, in 5th, 2500rpms, I'm doing 70. 1st is very nice off-road, and using 5th when I can keeps my MPGs at about 14-15...if I drive it nicely.