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Pics 89' 300GD 606 swap

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Pics 89' 300GD 606 swap

Post#1 » Sun Dec 15, 2019 9:16 am

Just wanted to post some pics of my ongoing 606 swap, this has been a tough one.

I'm very impressed with my mechanic's work on the 606 swap. I used factory 606 engine mounts to make the job easier, so only modification needed was trimming of the intake manifold. We had custom radiator/intercooler built, used an electric fan as space was pretty tight.

35" tires fit easier than I thought, we only had to trim the body mount behind the rear tires - looked like it would hit at full compression. Viking lift springs with bilstein shocks - didn't measure but around 3" lift. My mechanic built a custom drag link as the front axle was off center by about 1" after lift. We also made a custom drop pitman arm to help make the steering a little less scary.

The 606 with 400hp pump and HX35 is putting some serious power out! I've had a lot of trouble finding a clutch that will handle it. I tried the Larkspeed drivetorque stage 3 clutch from the UK that can be found on ebay and claims to fit a 711.116 transmission, but pressure plate was too large and bolt pattern didn't match flywheel - having a blast trying to get a refund. I ended up getting a new factory pressure plate and clutch. I even cryo treated the pressure plate and it's still wanting to drive through the clutch. I will be working on getting a clutch made for this but it's driveable for now.

Thanks for looking, any questions just ask. I'm not organized enough nor have the free time to post a full build thread with pics. I've built several vehicles and this has been by far the most difficult as far as finding parts, but totally worth it - this truck looks amazing and sounds insane. Hoping to make the 1,000s of 4 door wrangler drivers around here shit their pants!

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Re: Pics 89' 300GD 606 swap

Post#2 » Sun Dec 15, 2019 10:28 am

Nice looking

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Re: Pics 89' 300GD 606 swap

Post#3 » Sun Dec 15, 2019 11:13 am

Intriguing arrangement of the coolers.
I see super thick double pass radiator above a rather small intercooler (300-400hp diesels are using intercoolers larger than that radiator).
Do you have an EGT gauge?

Is there an oil cooler somewhere in there too?

What factory clutch/FW did you use? Factory for that iron box transmission?

That G definitely will make some of those Jeep folks wonder.
Congratulations on getting to finally drive it!

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Re: Pics 89' 300GD 606 swap

Post#4 » Sun Dec 15, 2019 11:47 am

It is my opinion that the top hose needs much more flex to deal with motor movement.

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Re: Pics 89' 300GD 606 swap

Post#5 » Mon Dec 16, 2019 7:15 am

I will recommend swapping your gear ratio to 4.11, with that amount of torque your rpms will be really high at higher speeds.


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Re: Pics 89' 300GD 606 swap

Post#6 » Tue Dec 17, 2019 8:16 am

Awesome looking G. Where are you located? 4 door wranglers are a dime a dozen in NC. And most only make it to the mall and you ask them about wheeling and they are like, I would never take this off road. Head shaker for sure.
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Re: Pics 89' 300GD 606 swap

Post#7 » Tue Dec 17, 2019 8:55 am

Nice! That's one big snail you got! What are you running for fresh air filter? Cone? Or are you planning a box of some sort?

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