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post #1 of 13 Old 07-26-2021, 04:48 PM Thread Starter
Jeepscot
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T18 pics

Does anyone have pics of a factory Jeep T18 mounted in a 4.2 liter 76-79 CJ? I am swapping a T18 into my 1985 and even have a 79 skid plate but nothing lines up. What would be different?

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post #2 of 13 Old 07-26-2021, 10:18 PM
HAZCAT
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Whatever you are taking out is a different size so it won't fit in the same which is why you got the other skidplate and mount. The 85 frame is a little different and holes probably wont line up...for the 79 mount but can drill those. The 300 transfercase may need some adjusting.

Also make sure it is a Jeep t18 not the Ford t18 and that you have the correct polit bearing/bushing for that t18 and your 4.2

Your drive shafts may need shortened or lengthened as well.

'84 CJ7, 44, 14 bolt, twin stick 300, 109"whl base, 4 linked
'93 XJ
'70 CJ6 Dauntless v6
'04 WJ
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post #3 of 13 Old 07-27-2021, 01:41 AM
mudbfun
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Lots of great trans swap info here. https://www.novak-adapt.com/knowledg...anual/t18-t19/
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post #4 of 13 Old 07-27-2021, 06:26 AM
exheep
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The Jeep T18 was never mated to a D300 to my knowledge only the D20.
The T18/D20 in my cj5 was swapped in with just moving the skid plate back to the further bolt holes.
I believe the D300 is why things arenít lining up and you are in fabrication territory.
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post #5 of 13 Old 07-27-2021, 06:39 AM
Matt1981CJ7
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My '81 factory skid plate had all the necessary frame bolt and trans mount holes to swap in a T-19.

The only modification necessary was I cut a small notch in the skid for the T-19 drain plug.

The swap did require an adapter to mate the T-19 to the D300. The adapted length of the T-19 was almost identical to the length of the original SR4, so I didn't even have to change the driveshafts.

Matt
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post #6 of 13 Old 07-27-2021, 08:32 AM Thread Starter
Jeepscot
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I have a Scout dana300 with the Texas pattern. I think the issuse is that I have no adapters. T18 direct to the bell housing and Scout dana 300 direct to the T18. My mounts are at the very rear of the T18. I believe an original 1979 example had an adapter between the T18 and the Dana20 and the mounts bolted to that.
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post #7 of 13 Old 07-27-2021, 01:09 PM
HAZCAT
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Quote:
Originally Posted by Jeepscot View Post
I have a Scout dana300 with the Texas pattern. I think the issuse is that I have no adapters. T18 direct to the bell housing and Scout dana 300 direct to the T18. My mounts are at the very rear of the T18. I believe an original 1979 example had an adapter between the T18 and the Dana20 and the mounts bolted to that.
If you got the 300 from a Scout that could be why you can bolt direct to the t18. Unless you have the 300 clocked to a different position from Jeep specs. Sometimes the issue with mating a Jeep tranny to a 300 is its position so the adapter is a clocking ring to allow rotation.

The mount points for the cross member may be different if the t18 is Scout as well.

The t18 should go straight to the bellhousing and that is where it goes. Everything after that adapts to it.
So if you have it connected at the bellhousing to the motor and it bolts directly to the 300, what exactly is not lining up?
If the 300 is hitting the tub when connected to the t18, you have to pound a dent...or like me, body lift to clear it.
If drive shafts dont fit now....thats part of what you have to change. Depends on what you have and what it came out of all the way around.
If the 79 cross member doesnt line up...so what? Make one. And my t4 and t5 trannys in my 82-86 CJs I have owned have tbe mount at the rear of the tranny for the cross member skid plate.

Really depends on what is not lining up as to what the issue might be.

'84 CJ7, 44, 14 bolt, twin stick 300, 109"whl base, 4 linked
'93 XJ
'70 CJ6 Dauntless v6
'04 WJ
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post #8 of 13 Old 07-27-2021, 05:35 PM
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Quote:
Originally Posted by Jeepscot View Post
I have a Scout dana300 with the Texas pattern. I think the issuse is that I have no adapters. T18 direct to the bell housing and Scout dana 300 direct to the T18. My mounts are at the very rear of the T18. I believe an original 1979 example had an adapter between the T18 and the Dana20 and the mounts bolted to that.

Your Scout D300 uses the same 1" thick adapter that the Jeep D20 used. It may look like it bolts directly to the rear of the trans, but there is an adapter there.
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post #9 of 13 Old 07-28-2021, 07:56 AM
exheep
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T18 pics

This is my T18/D20 mounts
I donít recall an adapter between the 2 but it looks like there may be. (Canít see in this pic)
I did separate them for installation but that was quite a few damaged brain cells ago
The mounts are just on the transmission nothing on transfer case
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post #10 of 13 Old 07-28-2021, 02:20 PM Thread Starter
Jeepscot
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That looks similar to what I have mocked up now with the 79 skid plate. I just have to mount it to the frame with new holes way behind the original existing ones.
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post #11 of 13 Old 07-28-2021, 02:21 PM Thread Starter
Jeepscot
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Interesting torque arm set up. Do you have a bushing on top? I see two underneath
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post #12 of 13 Old 07-28-2021, 02:22 PM Thread Starter
Jeepscot
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Thanks for all the input. I will post pics soon of my progress
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post #13 of 13 Old 07-29-2021, 01:12 PM
exheep
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Quote:
Originally Posted by Jeepscot View Post
Interesting torque arm set up. Do you have a bushing on top? I see two underneath

I think thereís a thinner one on top.
I just replaced it the same as it was on my T150.
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