4.7 swap

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

tommudd

Moderator
Staff member
Moderator
Joined
Jul 14, 2005
Messages
22,456
Reaction score
3,642
Location
Southeastern Ohio
You can post more than one picture per page by the way
keep it from being 250 pages
 

Dunekj

New Member
Joined
Jul 8, 2017
Messages
16
Reaction score
0
Location
Michigan
You can post more than one picture per page by the way

keep it from being 250 pages



Yes just found this out ...sorry folks new to this stuff please bare with me.


Sent from my iPhone using Tapatalk
 

Myke

Full Access Member
Joined
Nov 13, 2016
Messages
563
Reaction score
5
Location
USA
I hope you get this figured out. Could see this in my future if you do.
 

Honduras

Full Access Member
Joined
Apr 13, 2012
Messages
190
Reaction score
6
Location
Honduras
I have faith! You have no alternative, so dive in!!!

Why did #Honduras sell it? Unsatisfied??

Sent from my LG-K210 using Tapatalk

I sold it because the V8 swap was supposed to compliment the SFA swap that I never received

Rock Lizard took tens of thousands of dollars of my money and ran off with it without delivering a single thing. His excuse was that he needed to pay for legal fees for a child custody case (which, according to Springfield public records, only came out to ~$3K) I sued him and won, but the guy is already so indebted that I'll never see a dime of it.

Live and learn, I suppose. The V8 Liberty is still running without any problems, albeit under a new owner.
 

libordemise

Full Access Member
Joined
Jun 20, 2017
Messages
132
Reaction score
0
Location
CA
Sorry to hear that, I almost paid him to ship me a front winch mount bumper... Glad I didn't do it now,

Sent from my LG-K210 using Tapatalk
 

libordemise

Full Access Member
Joined
Jun 20, 2017
Messages
132
Reaction score
0
Location
CA
In wondering... Even with the JBA steel front diff, would the 3.7L be enough to turn deeper gears like 4.88 and 5.13 etc? Would that Durango engine be better?

Sent from my LG-K210 using Tapatalk
 

tommudd

Moderator
Staff member
Moderator
Joined
Jul 14, 2005
Messages
22,456
Reaction score
3,642
Location
Southeastern Ohio
In wondering... Even with the JBA steel front diff, would the 3.7L be enough to turn deeper gears like 4.88 and 5.13 etc? Would that Durango engine be better?

Sent from my LG-K210 using Tapatalk

LOL yes its enough
check out Troys ( tjkj2002 ) build sometime
stock 3.7/ SFA'd/ 35s / 5.13s etc

With the right gearing a small motor can pull more than a large with the wrong gearing
Just like people running 32s and stock 3.73s and complaining no power and poor mileage
 

libordemise

Full Access Member
Joined
Jun 20, 2017
Messages
132
Reaction score
0
Location
CA
Yaaaa.. His is pretty awesome, partly inspired me to do my lift, still think about an SFA from time to time [emoji124]

Sent from my LG-K210 using Tapatalk
 

Honduras

Full Access Member
Joined
Apr 13, 2012
Messages
190
Reaction score
6
Location
Honduras
In wondering... Even with the JBA steel front diff, would the 3.7L be enough to turn deeper gears like 4.88 and 5.13 etc? Would that Durango engine be better?

Sent from my LG-K210 using Tapatalk

The JBA diff will support 4.88, but not 5.13.
 

libordemise

Full Access Member
Joined
Jun 20, 2017
Messages
132
Reaction score
0
Location
CA
LOL yes its enough
check out Troys ( tjkj2002 ) build sometime
stock 3.7/ SFA'd/ 35s / 5.13s etc

With the right gearing a small motor can pull more than a large with the wrong gearing
Just like people running 32s and stock 3.73s and complaining no power and poor mileage
That makes me wonder.. Is there a better rear axle that could bolt up in the rear to compensate for the steel diff+ bigger gears?





Sent from my LG-K210 using Tapatalk
 

tjkj2002

Full Access Member
Joined
Dec 17, 2006
Messages
10,612
Reaction score
39
Location
Somewhere between being sane and insane!
That makes me wonder.. Is there a better rear axle that could bolt up in the rear to compensate for the steel diff+ bigger gears?





Sent from my LG-K210 using Tapatalk

How much $$$ do you have?

I'm running a Ford HP44 up front and a Currie RockJock60 in the rear.

The issue is no rear diff is a direct bolt up besides the what is in there already and if you want to go above 4.56 gears(I would not recommend 4.88's in a 8.25,requires grinding some ring gear teeth) you will need to modify and then you will need to change the t-case for one that has a speedo port since the speedo is run off the rear diff via a AC signal generator(tone ring and sensor),then adpat a AC signal generator on the speedo port in the new t-case.
 

libordemise

Full Access Member
Joined
Jun 20, 2017
Messages
132
Reaction score
0
Location
CA
Oh! I hadn't expected to need a new t case, depending on what the replacement t case and potential axles would come off of I might be able to budget something like this, # since I can probably sell my current axles for a good price lmao

Oops. Re read your setup

So; what determines what axle and tcase I can use??

Sent from my LG-K210 using Tapatalk
 

libordemise

Full Access Member
Joined
Jun 20, 2017
Messages
132
Reaction score
0
Location
CA
Also, with gears like say 4.88 what's an expected top speed decrease? How about 5.13?? Can I even take mine on the hiway if I did this lol

Sent from my LG-K210 using Tapatalk
 

tjkj2002

Full Access Member
Joined
Dec 17, 2006
Messages
10,612
Reaction score
39
Location
Somewhere between being sane and insane!
Oh! I hadn't expected to need a new t case, depending on what the replacement t case and potential axles would come off of I might be able to budget something like this, # since I can probably sell my current axles for a good price lmao

Oops. Re read your setup

So; what determines what axle and tcase I can use??

Sent from my LG-K210 using Tapatalk

Also, with gears like say 4.88 what's an expected top speed decrease? How about 5.13?? Can I even take mine on the hiway if I did this lol

Sent from my LG-K210 using Tapatalk

The TJ Rubicon RockTrac t-case and a Atlas t-case are about your only choice that is an actual upgrade with no mods needed besides driveshafts.I have a Atlas 4.3 in my KJ.

If your sticking to IFS you will not need lower then 4.56's since 32"(extreme 33") tires can can only be fitted anyways,you'd have to jump up to 34"-35" tires before needing 4.88/5.13 gears which will require a SFA swap,which would make a V8 swap much easier.
 

libordemise

Full Access Member
Joined
Jun 20, 2017
Messages
132
Reaction score
0
Location
CA
What a taank that would be..

Sent from my LG-K210 using Tapatalk
 

libordemise

Full Access Member
Joined
Jun 20, 2017
Messages
132
Reaction score
0
Location
CA
The TJ Rubicon RockTrac t-case and a Atlas t-case are about your only choice that is an actual upgrade with no mods needed besides driveshafts.I have a Atlas 4.3 in my KJ.

If your sticking to IFS you will not need lower then 4.56's since 32"(extreme 33") tires can can only be fitted anyways,you'd have to jump up to 34"-35" tires before needing 4.88/5.13 gears which will require a SFA swap,which would make a V8 swap much easier.
So, to go lower than 4.56s you need a sfa?? Meaning the jba steel diff is only good to 4.56s?

Sent from my LG-K210 using Tapatalk
 

libordemise

Full Access Member
Joined
Jun 20, 2017
Messages
132
Reaction score
0
Location
CA
Because the tires wont fit I guess? Even with my 3.75" lift?

Sent from my LG-K210 using Tapatalk
 

Latest posts

Members online

Top