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Old 07-28-2015, 10:30 AM
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4BT swap 95 YJ

I'm wanting to do a 4BT swap into my 95 yj. Has anyone on here done one? If you have, what are the pros and cons you have experienced?

Thanks

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Old 07-28-2015, 11:09 AM   #2
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Originally Posted by zacprows View Post
I'm wanting to do a 4BT swap into my 95 yj. Has anyone on here done one? If you have, what are the pros and cons you have experienced?

Thanks
I finished mine up about a year ago. Biggest problems that will be fixed soon enough is my gearing is 4.56 with 33" tires. If you plan on running 33" tires a better gearing choice would be around a 3.73. The other Con that I have with it is the AX-15 trans, It holds up just fine but an auto trans would be a whole lot better on the trails. I love the extra torque given with the motor and would definitely do it again.

Do you already have the 4bt?
If not make sure you plan out what transmission you plan to use before buying.
They make different bellhousing adapters for the back of the 4bt, If using the AX-15 trans make sure to buy one with the ford bellhousing adapter.

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Old 07-29-2015, 12:58 AM
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I finished mine up about a year ago. Biggest problems that will be fixed soon enough is my gearing is 4.56 with 33" tires. If you plan on running 33" tires a better gearing choice would be around a 3.73. The other Con that I have with it is the AX-15 trans, It holds up just fine but an auto trans would be a whole lot better on the trails. I love the extra torque given with the motor and would definitely do it again. Do you already have the 4bt? If not make sure you plan out what transmission you plan to use before buying. They make different bellhousing adapters for the back of the 4bt, If using the AX-15 trans make sure to buy one with the ford bellhousing adapter.

I don't have the 4bt yet. I'm gathering info before I start buying all the stuff I need. I plan on going with 35 or 37s.

My total plan is to do 1 tons and then change from leaf to coil spring then do the 4bt when I have the axles.

I def want to stay with a manual, what hearing would you recommend?

Do you DD this? What is your gas mileage?

And about how much did this cost you?

Thanks
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Old 07-29-2015, 08:59 AM   #4
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Originally Posted by zacprows View Post
I don't have the 4bt yet. I'm gathering info before I start buying all the stuff I need. I plan on going with 35 or 37s.

My total plan is to do 1 tons and then change from leaf to coil spring then do the 4bt when I have the axles.

I def want to stay with a manual, what hearing would you recommend?

Do you DD this? What is your gas mileage?

And about how much did this cost you?

Thanks

My next jump with mine will be a dana 44 front axle and I plan to keep the 4.56 gears with 37" tires.

Right now with the 4.56 and 33" tires my top speeds at 55mph.

I DD it for the most part but I only have a 1 mile commute to work. I have put around 5000 miles on it since the swap and average around 20mpg with it.

It definitely wasn't cheap I would say I spent around 5k on the swap total.
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Old 07-30-2015, 06:05 PM
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My next jump with mine will be a dana 44 front axle and I plan to keep the 4.56 gears with 37" tires. Right now with the 4.56 and 33" tires my top speeds at 55mph. I DD it for the most part but I only have a 1 mile commute to work. I have put around 5000 miles on it since the swap and average around 20mpg with it. It definitely wasn't cheap I would say I spent around 5k on the swap total.
What axles are you running currently?
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Old 07-31-2015, 08:47 AM   #6
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Currently is the ford 8.8 rear and the Dana 30 front.


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Old 07-31-2015, 12:56 PM
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Currently is the ford 8.8 rear and the Dana 30 front. Sent from AutoGuide.com Free App
do they handle to the engine well?
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Old 07-31-2015, 12:57 PM
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Also do you pass emissions?
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Old 07-31-2015, 07:01 PM   #9
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I haven't had any problems with the axles YET. The 8.8 should have no problems holding up. And hopefully this winter I will be able to install my Dana 44 front and won't have to worry about the Dana 30 holding up.

My county doesn't require the emissions testing and I also run antique plates. If it had to pass I think it would if I installed a muffler, I'm running 3" straight pipe now.


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Old 08-02-2015, 10:53 PM   #10
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everywhere ive read you need atleast a 4" suspension lift, whys that and would i be able to get away with a 2.5" SOA? i feel like theres a technical reason, not just a height thing. haha
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Old 08-03-2015, 08:48 AM   #11
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It's required for the height. The motors roughly 3' tall. I have a 4.5" lift and a 1" body lift. You could easily get away with a 2.5" SOA lift.


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Old 08-03-2015, 04:12 PM   #12
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It's required for the height. The motors roughly 3' tall. I have a 4.5" lift and a 1" body lift. You could easily get away with a 2.5" SOA lift. Sent from AutoGuide.com Free App
good to know, thanks!

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