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MB T90 Transmission |
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46MB2A 
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Joined: 30 Mar. 2018 Location: Utah Status: Offline Points: 27 |
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 Topic: MB T90 TransmissionPosted: 20 Sep. 2018 at 4:03am |
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I am thinking of changing my T84 transmission with a T90. I have a question about fit. Will I need to make any body modifications? I know the T90 sits a little higher but dont know if it sits further back as well. Can I just make the modifications to the transmission cover that bolts to the body? Thanks for any help, Kyle
Edited by 46MB2A - 21 Sep. 2018 at 3:42am |
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Kyle Thomas
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Stev
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Sponsor Member Joined: 27 July 2016 Location: Cincinnati Status: Offline Points: 2391 |
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Posted: 20 Sep. 2018 at 1:19pm |
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Kyle,
The MB and CJ2A have different transmission cross members. You might just be able to change to a Cj2A transmission cross member and not have to modify the body. Stev
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Stev
1946 CJ2A Trail Jeep (The Saint), 1948 CJ2A Lefty Restored |
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TateC
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Joined: 23 Feb. 2018 Location: SLC, Utah Status: Offline Points: 510 |
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Posted: 20 Sep. 2018 at 4:10pm |
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This is quite the involved swap to do. It could involve trimming the floor and or changing cross members. I'm curious to hear you reasoning for changing from the T84 to the T90. I will say that I have a T90 in my MB and have no plans to remove it and change to a T84. Even thought G503 isn't my favorite, there are many threads about this and that could help you. Good Luck and keep us posted.
Edit: Where are you in the Great State of Utah? Edited by TateC - 20 Sep. 2018 at 4:12pm |
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Tate Christensen
1941 Ford GP #9687 1943 Willys MB #263100 1944 Ford GPW #234613 1945 Willys CJ2A #10226 |
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46MB2A
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Joined: 30 Mar. 2018 Location: Utah Status: Offline Points: 27 |
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Posted: 21 Sep. 2018 at 3:39am |
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TateC, I [f you have a T90 in your MB what did you do to make it fit? I already have a T90 crossmember. WIll I need to do anything else to the MB body to make it work? The T90 is a more robust transmission and have always heard it is much stronger. Thanks for the info so far. I am north of Ogden in Farr West. Kyle
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Kyle Thomas
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TateC
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Joined: 23 Feb. 2018 Location: SLC, Utah Status: Offline Points: 510 |
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Posted: 21 Sep. 2018 at 5:16am |
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I did not do the swap in my MB but I have spent a lot of time under that Jeep. Whoever did the swap used a MB crossmember and just drilled a new hole for the transfer case mount, they also lengthened the clutch rod. As for the body they hastily cut it so the transmission would fit. Overall I'd say my MB isn't exactly a poster boy for a swap done well but hey it works and I drive that Jeep everyday.
Also I really like the Farr West area. Edited by TateC - 21 Sep. 2018 at 5:18am |
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Tate Christensen
1941 Ford GP #9687 1943 Willys MB #263100 1944 Ford GPW #234613 1945 Willys CJ2A #10226 |
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smfulle
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Posted: 21 Sep. 2018 at 5:19am |
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Hey Kyle, Can’t help you with your t90 swap question, but I live about 100yards from Farr West in Plain City. Depending on when you go by you can see my rig, Grampa’s Jeep, parked in the Wahlquist Jr. High parking lot on good weather days during school. Get that thing rolling and we could hit some trails together.
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Unkamonkey
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Joined: 23 Mar. 2016 Location: Greeley CO Status: Offline Points: 2093 |
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Posted: 21 Sep. 2018 at 5:50am |
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You are a teacher? A few of my friends taught. She did several languages and he did the special needs kids. He would deal with any of them even if they were not in his program. He got a lot of kids through school. |
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uncamonkey
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Ol' Unreliable
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Joined: 25 Sep. 2016 Location: CO Springs CO Status: Offline Points: 4226 |
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Posted: 23 Sep. 2018 at 7:27am |
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The T-90 is longer and lower than the T-84. The floor needs to be cut. It's your jeep, only you can decide if it's worth it.
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There's a reason it's called Ol' Unreliable
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46MB2A
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Joined: 30 Mar. 2018 Location: Utah Status: Offline Points: 27 |
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Posted: 24 Sep. 2018 at 3:35am |
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THanks Ol' Unreliable! THat is what I was looking for. I appreciate your comments.
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Kyle Thomas
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Bill2A
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Joined: 01 Mar. 2018 Location: Fort Worth, Tex Status: Offline Points: 517 |
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Posted: 25 Sep. 2018 at 3:17am |
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The T90 is stronger and in the case of the T90C it even has a lower 1st gear.
Still, if you have to spend money, re design it and do surgery to make it fit, perhaps there is a better choice for all the effort. For instance, a T98 would require some of the same type of cutting and reworking. Much depends on what you hope to end up with and how much your a willing to do to get there.
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1946 CJ2A 14098
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Joe DeYoung
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Posted: 25 Sep. 2018 at 2:35pm |
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Included in with the other mods listed above, you will have to relocate the transmission cross member mounting bracket that is on the frame rails back towards the rear of the jeep 1". This is assuming you have an MB/GPW frame.
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Joe DeYoung
to many jeeps, parts, and accessories to list here, but apparently enough to keep me in trouble with my wife. |
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46MB2A wrote: