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So I was home leave last week, and while my family was having a pleasent dinner conversation about camping and off raoding with my 1976 jeep cj5. My dad brought up replacing my original 238 and putting a ford 300 straight six in it. The complications that we started to think about are... one motor mounts but that would be an easy fix...two and the biggest i dont want to replace my trans at all so my main reason for me posting this is to see if anyone knows the exact bolt pattern for the 300 ci engine and the t18 4 speed trans bell housing.... is there any mods i would need to do or will it work at all
The village idiot.
Joined: Feb 2010
Posts: 1,126
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From: Southern WV
So I was home leave last week, and while my family was having a pleasent dinner conversation about camping and off raoding with my 1976 jeep cj5. My dad brought up replacing my original 238 and putting a ford 300 straight six in it. The complications that we started to think about are... one motor mounts but that would be an easy fix...two and the biggest i dont want to replace my trans at all so my main reason for me posting this is to see if anyone knows the exact bolt pattern for the 300 ci engine and the t18 4 speed trans bell housing.... is there any mods i would need to do or will it work at all
If you want a 4.9 "just because", you may find a trans adapter at advance adapters, may even have engine mounts, but I've been in the Jeep crowd before and that swap I've never seen. Usually SB GM engines and the above mentioned Jeep 4.0 HO.
Posting Guru
Joined: Jan 2001
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From: S. Mississippi
So I was home leave last week, and while my family was having a pleasent dinner conversation about camping and off raoding with my 1976 jeep cj5. My dad brought up replacing my original 238 and putting a ford 300 straight six in it. The complications that we started to think about are... one motor mounts but that would be an easy fix...two and the biggest i dont want to replace my trans at all so my main reason for me posting this is to see if anyone knows the exact bolt pattern for the 300 ci engine and the t18 4 speed trans bell housing.... is there any mods i would need to do or will it work at all
And don't give into the bent-8 obsession, the 300 will do you just fine.
Cargo Master
Joined: Oct 2005
Posts: 2,298
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From: NJ
It's not significantly cheaper to build a 300 six, if anything I'd expect it to be more costly since parts are likely more expensive. For similar cost you have have a lot more torque from a small block and I'd expect a similar amount of work involved in the swap. Hell, if a 460 will fit easily in that engine compartment go that route, but I think that swap would likely make it more complex and expensive compared to a small block.
The village idiot.
Joined: Feb 2010
Posts: 1,126
Likes: 1
From: Southern WV
It's not significantly cheaper to build a 300 six, if anything I'd expect it to be more costly since parts are likely more expensive. For similar cost you have have a lot more torque from a small block and I'd expect a similar amount of work involved in the swap. Hell, if a 460 will fit easily in that engine compartment go that route, but I think that swap would likely make it more complex and expensive compared to a small block.
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From: Denver Metro Area, CO
The 300 I6 shares the same bell housing bolt pattern as the 302 & 351W (and several
others):
List of Ford bellhousing patterns - Wikipedia, the free encyclopedia
I've never done this swap but a quick Google shows different input shaft lengths as well
as bolt patterns between the Ford & Jeep T18s:
Borg Warner T-18 Transmission Diagrams and Information
Let me google that for you
others):
List of Ford bellhousing patterns - Wikipedia, the free encyclopedia
I've never done this swap but a quick Google shows different input shaft lengths as well
as bolt patterns between the Ford & Jeep T18s:
Borg Warner T-18 Transmission Diagrams and Information
The Ford version uses the standard Ford "butterfly" bolt pattern and a 1 1/16" 10 spline input shaft. The input shaft is around 6 1/2" long. The input shaft is about 1/2" shorter than the Jeep T-18 input shaft...
...Ford T-18s have a slightly different bolt pattern than most Jeep T-18s. The drivers side lower bolt is lower on the Ford version. The Ford pattern matches the T-150 and T-176.
...Ford T-18s have a slightly different bolt pattern than most Jeep T-18s. The drivers side lower bolt is lower on the Ford version. The Ford pattern matches the T-150 and T-176.
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